Carrier 69NT40--541--200 TO 299 Service manual

Container Refrigeration
r
OPERATION AND SERVICE
for
69NT40--541--200 TO 299
Container Refrigeration Units
T--317 Rev A
OPERATION AND SERVICE MANUAL
CONTAINER REFRIGERATION UNIT
Models
69NT40--541--200 to 299
SAFETY SUMMARY
GENERAL SAFETY NOTICES
The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this
manual. They are recommended precautions that must be understood and applied during operation and maintenance
of the equipment covered herein. The general safety notices are presented in the following three sections labeled:
First Aid, Operating Precautions and Maintenance Precautions. A listing of the specific warnings and cautions
appearing elsewhere in the manual follows the general safety notices.
FIRST AID
An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immediately.
OPERATING PRECAUTIONS
Always wear safety glasses.
Keep hands, clothing and tools clear of the evaporator and condenser fans.
No work should be performed on the unit until all circuit breakers, start-stop switches are turned off, and power supply
is disconnected.
Always work in pairs. Never work on the equipment alone.
In case of severe vibration or unusual noise, stop the unit and investigate.
MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the evaporator and condenser fans. Do not open the condenser fan grille or
evaporator access panels before turning power off, disconnecting and securing the power plug.
Be sure power is turned off before working on motors, controllers, solenoid valves and electrical control switches. Tag
circuit breaker and power supply to prevent accidental energizing of circuit.
Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires. Problems with
the system should be diagnosed, and any necessary repairs performed, by qualified service personnel.
When performing any arc welding on the unit or container, disconnect all wire harness connectors from the modules in
both control boxes. Do not remove wire harness from the modules unless you are grounded to the unit frame with a
static safe wrist strap.
In case of electrical fire, open circuit switch and extinguish with CO2 (never use water).
UNIT LABEL IDENTIFICATION
To help identify the label hazards on the unit and explain the level of awareness each one carries, an explanation is
given with the appropriate consequences:
DANGER -- means an immediate hazard which WILL result in severe personal injury or death.
WARNING -- means to warn against hazards or unsafe conditions which COULD result in severe personal injury or
death.
CAUTION -- means to warn against potential hazard or unsafe practice which could result in minor personal injury,
product or property damage.
SPECIFIC WARNING AND CAUTION STATEMENTS
The statements listed below are applicable to the refrigeration unit and appear elsewhere in this manual. These
recommended precautions must be understood and applied during operation and maintenance of the equipment
covered herein.
WARNING
WARNING
Beware of unannounced starting of the
evaporator and condenser fans. The unit
may cycle the fans and compressor unexpectedly as control requirements dictate.
Do not attempt to remove power plug(s) before turning OFF start-stop switch (ST), unit
circuit breaker(s) and external power
source.
WARNING
Make sure the power plugs are clean and
dry before connecting to any power receptacle.
Safety-1
T-317
SPECIFIC WARNING AND CAUTION STATEMENTS -- Continued
WARNING
WARNING
Make sure that the unit circuit breaker(s)
(CB-1 & CB-2) and the START-STOP switch
(ST) are in the “O” (OFF) position before
connecting to any electrical power source.
Wear rubber gloves and wash the solution
from the skin immediately if accidental contact occurs. Do not allow the solution to
splash onto concrete.
WARNING
WARNING
Never use air or gases containing oxygen
for leak testing or operating refrigerant
compressors. Pressurized mixtures of air
or gases containing oxygen can lead to explosion.
Always turn OFF the unit circuit breakers
(CB-1 & CB-2) and disconnect main power
supply before working on moving parts.
WARNING
WARNING
Make sure power to the unit is OFF and
power plug disconnected before removing
capacitor(s).
Make sure power to the unit is OFF and
power plug disconnected before replacing
the compressor.
WARNING
WARNING
With power OFF discharge the capacitor
before disconnecting the circuit wiring.
Before disassembly of any external compressor component make sure to relieve
possible internal pressure by loosening the
bolts and tapping the component with a
soft hammer to break the seal.
WARNING
The unit power plug must be disconnected
to remove power from circuit breaker CB1
WARNING
CAUTION
Do not use a nitrogen cylinder without a
pressure regulator. Do not use oxygen in or
near a refrigeration system as an explosion
may occur.
Do not remove wire harnesses from controller unless you are grounded to the unit
frame with a static safe wrist strap.
WARNING
CAUTION
Do not open the condenser fan grille before
turning power OFF and disconnecting
power plug.
Unplug all controller wire harness connectors before performing arc welding on any
part of the container.
WARNING
CAUTION
Oakite No. 32 is an acid. Be sure that the
acid is slowly added to the water. DO NOT
PUT WATER INTO THE ACID -- this will
cause spattering and excessive heat.
T-317
Pre-trip inspection should not be performed with critical temperature cargoes in
the container.
Safety-2
SPECIFIC WARNING AND CAUTION STATEMENTS -- Continued
CAUTION
CAUTION
When Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated.
At the completion of Pre-Trip activity, dehumidification and bulb mode must be reactivated.
To prevent trapping liquid refrigerant in the
manifold gauge set be sure set is brought to
suction pressure before disconnecting.
CAUTION
CAUTION
Removing the compressor motor press-fit
stator in the field is not recommended. The
rotor and stator are a matched pair and
should not be separated.
When condenser water flow is below 11 lpm
(3 gpm) or when water-cooled operation is
not in use, the CFS switch MUST be set to
position ”1” or the unit will not operate
properly.
CAUTION
CAUTION
The copper tube which connects to the oil
suction strainer extends out the bottom
with the bottom plate removed. Take precautions to avoid bending or breaking it
while changing crankcase positions.
When a failure occurs during automatic
testing the unit will suspend operation
awaiting operator intervention.
CAUTION
CAUTION
When Pre--Trip test Auto 2 runs to completion without being interrupted, the unit will
terminate pre-trip and display “Auto 2”
“end.” The unit will suspend operation until
the user depresses the ENTER key!
Ensure that thrust washer does not fall off
dowel pins while installing oil pump.
CAUTION
CAUTION
The set screw on the crankshaft must be
removed for this type of oil pump.
The unit will remain in the full cooling mode
as long as the emergency bypass switch is
in the BYPASS position. If the cargo may be
damaged by low temperatures, the operator
must monitor container temperature and
manually cycle operation as required to
maintain temperature within required limits.
CAUTION
Use only Carrier Transicold approved
Polyol Ester Oil (POE) -- Mobil ST32 compressor oil with R-134a. Buy in quantities of
one quart or smaller. When using this
hygroscopic oil, immediately reseal. Do not
leave container of oil open or contamination will occur.
CAUTION
The unit will remain in the DEFROST mode
as long as the emergency defrost switch is
in the DEFROST position. To prevent cargo
damage, the operator must monitor container temperature and manually cycle operation as required to maintain temperature
within required limits.
CAUTION
Take necessary steps (place plywood over
coil or use sling on motor) to prevent motor
from falling into condenser coil.
Safety-3
T-317
SPECIFIC WARNING AND CAUTION STATEMENTS -- Continued
CAUTION
CAUTION
Do not allow moisture to enter wire splice
area as this may affect the sensor resistance.
If the thermostatic expansion valve is found
to be in need of replacement, then the
power head and cage assembly are to
replaced as a pair. They are a matched pair
and replacing one without the other will
affect the superheat setting.
CAUTION
Do not allow the recorder stylus to snap
back down. The stylus arm base is spring
loaded, and damage may occur to the chart,
or the stylus force may be altered.
CAUTION
CAUTION
DO NOT disassemble piston from NEW suction modulating valve powerhead assembly. Doing so may result in damage to piston.
The inside mechanism of the recorder,
particularly the inside of the element
housing should never be oiled, however,
control mechanisms should be sprayed
periodically (every 60 days) with corrosion
inhibiting CRC 3-36a or 6-66 or LPS no. 2.
CAUTION
CAUTION
Recorder element capillary tubing may be
bent, but never sharper than 1/2” radius;
extra care should be taken when bending
adjacent to welds. The bulb should never
be bent, as this will affect calibration.
The unit must be OFF whenever a programming card is inserted or removed from the
controller programming port.
T-317
Safety-4
TABLE OF CONTENTS
PARAGRAPH NUMBER
Page
GENERAL SAFETY NOTICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1
FIRST AID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1
OPERATING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1
MAINTENANCE PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1
UNIT LABEL IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1
SPECIFIC WARNING AND CAUTION STATEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.2 CONFIGURATION IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3 OPTION DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.1 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.2 Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.3 Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.4 Temperature Readout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.5 Pressure Readout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.6 USDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.7 Interrogator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.8 Remote Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.9 Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.10 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.3.11 Condenser Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.12 Autotransformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.13 Temperature Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.14 Gutters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.15 Handles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.16 Thermometer Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.17 Water Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.18 Back Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.19 460 Volt Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.20 230 Volt Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.21 Cable Restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.22 Upper Air (Fresh Air Make Up) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.23 Lower Air (Fresh Air Make Up) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.24 Arctic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.25 Power Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.26 Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.27 Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.28 Plate Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.29 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1.3.30 Condenser Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
i
T-317
TABLE OF CONTENTS - Continued
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 Refrigeration Unit -- Front Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.2 Fresh Air Makeup Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.3 Evaporator Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.4 Compressor Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.5 Air Cooled Condenser Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.6 Water-Cooled Condenser Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.7 Control Box Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.8 Communications Interface Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 REFRIGERATION SYSTEM DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 SAFETY AND PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 REFRIGERATION CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MICROPROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 TEMPERATURE CONTROL MICROPROCESSOR SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.1 Key Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.2 Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.3 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 CONTROLLER SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.1 Configuration Software (Configuration Variables) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.2 Operational Software (Function Codes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 MODES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 Temperature Control -- Perishable Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 Evaporator Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.3 Defrost Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.4 Failure Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.5 Generator Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.6 Condenser Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.7 Arctic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.8 Perishable Mode -- Conventional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.9 Perishable Mode -- Economy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.10 Perishable Mode -- Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.11 Perishable, Dehumidification -- Bulb Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.12 Temperature Control -- Frozen Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.13 Frozen Mode -- Conventional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.14 Frozen Mode -- Economy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 CONTROLLER ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5. UNIT PRE-TRIP DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T-317
ii
2-1
2-1
2-1
2-1
2-2
2-3
2-4
2-5
2-6
2-6
2-7
2-8
2-9
2-10
3-1
3-1
3-2
3-2
3-3
3-3
3-3
3-3
3-4
3-4
3-4
3-4
3-4
3-4
3-4
3-4
3-5
3-5
3-5
3-5
3-6
3-6
3-6
3-6
3-7
TABLE OF CONTENTS - Continued
3.6
DataCORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.2 DataCORDER Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.3 Sensor Configuration (dCF02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.4 Logging Interval (dCF03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.5 Thermistor Format (dCF04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.6 Sampling Type (dCF05 & dCF06) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.7 Alarm Configuration (dCF07 -- dCF10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.8 DataCORDER Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.9 Pre-Trip Data Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.10 DataCORDER Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.11 USDA Cold Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.12 USDA Cold Treatment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.13 DataCORDER Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 INSPECTION (Before Starting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 CONNECT POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1 Connection To 380/460 vac Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2 Connection to190/230 vac Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 ADJUST FRESH AIR MAKEUP VENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 Upper Fresh Air Makeup Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Lower Fresh Air Makeup Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3 Fresh Air Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 CONNECT WATER-COOLED CONDENSER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 Water--Cooled Condenser with Water Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2 Water-Cooled Condenser with Condenser Fan Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 CONNECT REMOTE MONITORING
RECEPTACLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 STARTING AND STOPPING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.1 Starting the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.2 Stopping the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7 START--UP INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.1 Physical Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.2 Check Controller Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.3 Start Temperature Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.4 Complete Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8 PRE-TRIP DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9 OBSERVE UNIT OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.1 Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.2 Probe Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10 SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.1 Sequence Of operation -- Perishable Mode Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.2 Sequence Of Operation -Perishable Mode Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.3 Sequence Of operation -- Frozen Mode Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.4 Sequence Of Operation -- Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii
3-7
3-7
3-7
3-8
3-10
3-10
3-10
3-10
3-10
3-10
3-10
3-11
3-12
3-12
4-1
4-1
4-1
4-1
4-1
4-1
4-2
4-2
4-2
4-2
4-2
4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-3
4-4
4-4
4-5
4-5
4-6
4-7
4-7
4-7
T-317
TABLE OF CONTENTS - Continued
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
5.1
UNIT WILL NOT START OR STARTS THEN STOPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
5.2
UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
5.3
UNIT RUNS BUT HAS INSUFFICIENT COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2
5.4
UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2
5.5
UNIT WILL NOT TERMINATE HEATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2
5.6
UNIT WILL NOT DEFROST PROPERLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2
5.7
ABNORMAL PRESSURES (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3
5.8
ABNORMAL NOISE OR VIBRATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3
5.9
CONTROLLER MALFUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3
5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-4
5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-4
5.12 AUTOTRANSFORMER MALFUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-4
5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH . . . . . . . . . . . . . . . . . . . . . . . .
5-4
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
6.1
REPAIRING THE REFRIGERATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
6.2
PIERCING VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
6.3
MANIFOLD GAUGE SET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
6.4
REFRIGERANT RECOVERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2
6.5
REFRIGERANT LEAK CHECKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3
6.6
6.7
6.8
EVACUATION AND DEHYDRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3
6.6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3
6.6.2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3
6.6.3 Procedure - Complete system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3
REFRIGERANT CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4
6.7.1 Checking the Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4
6.7.2 Adding Refrigerant to System (Full Charge) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4
6.7.3 Adding Refrigerant to System (Partial Charge) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4
6.7.4 Emergency Shipboard Refrigerant Charging Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4
COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-6
6.8.1 Removal and Replacement of Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-6
6.8.2 Compressor Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-7
6.8.3 Compressor Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-9
6.8.4 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-9
6.8.5 Installing the Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-9
6.8.6 Compressor Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-10
HIGH PRESSURE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-11
6.9.1 Replacing High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-11
6.9.2 Checking High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-11
6.10 CONDENSER COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-11
6.9
6.11 CONDENSER FAN AND MOTOR ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-11
6.12 WATER COOLED CONDENSER CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-12
6.13 FILTER-DRIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-13
T-317
iv
TABLE OF CONTENTS - Continued
6.14 THERMOSTATIC EXPANSION VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-14
6.14.1 Checking Superheat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-14
6.14.2 Hermetic Valve Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-15
6.14.3 Semi--Hermetic Valve Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-15
6.15 EVAPORATOR COIL AND HEATER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-15
6.15.1 Evaporator Coil Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-15
6.15.2 Evaporator Heater Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-15
6.16 EVAPORATOR FAN AND MOTOR ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-16
6.16.1 Replacing The Evaporator Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-16
6.16.2 Disassemble The Evaporator Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-16
6.16.3 Assemble The Evaporator Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-16
6.17 EVAPORATOR FAN MOTOR CAPACITORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-16
6.17.1 When To Check For A Defective Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-16
6.17.2 Removing The Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-17
6.17.3 Checking The Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-17
6.18 SUCTION MODULATION VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-17
6.18.1 Precheck Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-17
6.18.2 Checking The Stepper valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-18
6.18.3 Checking The Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-18
6.19 AUTOTRANSFORMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-18
6.20 POWER FACTOR CORRECTOR CAPACITORS (PFC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-19
6.21 CONTROLLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-19
6.21.1 Handling Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-19
6.21.2 Controller Trouble-Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-20
6.21.3 Controller Programming Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-20
6.21.4 Removing and Installing the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-21
6.21.5 Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-21
6.22 VENT POSITION SENSOR SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-21
6.23 TEMPERATURE SENSOR SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-21
6.23.1 Sensor Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-21
6.23.2 Sensor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-22
6.23.3 Sensor Re--Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-23
6.24 ELECTRONIC PARTLOW TEMPERATURE RECORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-23
6.25 MAINTENANCE OF PAINTED SURFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-25
6.26 COMPOSITE CONTROL BOX REPAIRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-25
6.26.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-25
6.26.2 Cracks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-25
6.26.3 Chips And Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-25
6.26.4 Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-26
6.26.5 Door Hinge Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-26
6.27 COMMUNICATIONS INTERFACE MODULE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-29
ELECTRICAL WIRING SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-1
7.1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
v
7-1
T-317
LIST OF ILLUSTRATIONS
FIGURE NUMBER
Figure 2-1 Refrigeration Unit -- Front Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-2 Evaporator Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-3 Compressor Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-4 Condenser Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-5 Water-Cooled Condenser Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-6 Control Box Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-7 Refrigeration Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3- 1 Temperature Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3- 2 Key Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3- 3 Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3- 4 Micro-Link 3 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3- 5 Standard Configuration Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3- 6 Data Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3- 7 DataBank Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-1 Autotransformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-2 Make Up Air Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-3 Controller Operation -- Perishable Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-4 Controller Operation -- Frozen Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-5 Perishable Mode Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-6 Perishable Mode Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-7 Frozen Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-8 Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-1. Piercing Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-2. Manifold Gauge Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-3. Manifold Gauge Set Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-4. Vacuum Pump Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-5 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-6 Exploded View of Valve Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-7 Bottom Plate Removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-8 Oil Pump and Bearing Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-9 Low Profile Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-10 Motor End Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-11 Equalizing Tube and Lock Screw Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-12 Crankshaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-13 Suction Valve & Positioning Springs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-14 Piston Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-15 High Pressure Switch Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-16 Water-Cooled Condenser Cleaning -- Forced Circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-17 Water Cooled Condenser Cleaning - Gravity Circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-18 Thermostatic Expansion Valve Bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-19 Hermetic Thermostatic Expansion Valve Brazing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-20. Evaporator Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-21 Suction Modulation Valve (SMV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-22 Controller Section of the Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-23 Sensor Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T-317
vi
Page
2-1
2-2
2-3
2-4
2-5
2-6
2-11
3-1
3-2
3-2
3-3
3-9
3-10
3-11
4-1
4-2
4-5
4-6
4-6
4-7
4-7
4-8
6-1
6-2
6-2
6-5
6-6
6-7
6-7
6-8
6-8
6-8
6-9
6-9
6-9
6-9
6-11
6-13
6-13
6-14
6-14
6-16
6-17
6-20
6-22
LIST OF ILLUSTRATIONS - Continued
FIGURE NUMBER
Figure 6-24 Sensor and Cable Splice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-25 Supply Sensor Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-26 Return Sensor Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-27. Electronic Partlow Temperature Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-28 Door Hinge Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-29. Insert Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-30. Communications Interface Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-31 R-134a Compressor Pressure and Motor Current Curves Versus Ambient Temperature . . . . .
Figure 6-31 R-134a Compressor Pressure and Motor Current Curves Versus Ambient Temperature . . . . .
Figure 7-1 LEGEND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7-2 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7-3 SCHEMATIC DIAGRAM -- TransFRESH and Vent Position Sensors (VPS) . . . . . . . . . . . . . . . .
Figure 7-4 SCHEMATIC DIAGRAM, WIRING DIAGRAM-- Electronic Partlow Recorder . . . . . . . . . . . . . . . .
Figure 7-5 UNIT WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page
6-23
6-23
6-23
6-24
6-26
6-28
6-29
6-33
6-34
7-2
7-3
7-4
7-5
7-6
LIST OF TABLES
TABLE NUMBER
Page
Table 2-1 Safety and Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-9
Table 3-1 Key Pad Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2
Table 3-2 DataCORDER Configuration Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-8
Table 3-3 DataCORDER Standard Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-8
Table 3-4 Controller Configuration Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Table 3-5 Controller Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-14
Table 3-6 Controller Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Table 3-7 Controller Pre-Trip Test Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Table 3-7 Controller Pre-Trip Test Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Table 3-8 DataCORDER Function Code Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Table 3-9 DataCORDER Pre-Trip Result Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Table 3-10 DataCORDER Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
Table 6-1 Sensor Temperature/Resistance Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
Table 6-2 Crack, Chip & Hole Repair Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
Table 6-3 Insert Repair Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
Table 6-4 Drill Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
Table 6-5 Recommended Bolt Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29
Table 6-6 Wear Limits For Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30
Table 6-7 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30
Table 6-8 Compressor Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31
Table 6-9 R-134a Temperature - Pressure Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32
vii
T-317
SECTION 1
INTRODUCTION
1.1 INTRODUCTION
1.3.1 Battery
The refrigeration controller may be fitted with standard
replaceable batteries or a rechargeable battery pack.
1.3.2 Dehumidification
The unit may be fitted with a humidity sensor. This
sensor allows setting of a humidity set point in the
controller. In the dehumidification mode the controller
will operate to reduce internal container moisture level.
1.3.3 Control Box
The control box is composite material may be fitted with
a lockable door.
1.3.4 Temperature Readout
The unit may be fitted with suction and discharge
temperature sensors. The sensor readings may be
viewed on the controller display.
1.3.5 Pressure Readout
The unit may be fitted with suction and discharge
pressure gauges or suction and discharge transducers
or no pressure readout. The transducer readings may
be viewed on the controller display.
1.3.6 USDA
The unit may be supplied with fittings for additional
temperature probes which allow recording of USDA
Cold Treatment data by the integral DataCORDER
function of the Micro--Link refrigeration controller.
1.3.7 Interrogator
Units that use the DataCORDER function are fitted with
interrogator receptacles for connection of equipment to
download the recorded data. Two receptacles may be
fitted, one accessible from the front of the container and
the other mounted inside the container (with the USDA
receptacles).
1.3.8 Remote Monitoring
The unit may be fitted with a remote monitoring
receptacle. This item allows connection of remote
indicators for COOL, DEFROST and IN RANGE.
Unless otherwise indicated, the receptacle is mounted
at the control box location
1.3.9 Communications.
The unit may be fitted with a communications interface
module. The communications interface module is a
slave module which allows communication with a
master central monitoring station. The module will
respond to communication and return information over
the main power line. Refer to the ship master system
technical manual for further information.
1.3.10 Compressor
The unit is fitted with a single speed reciprocating
compressor.
The Carrier Transicold model 69NT40--541--200/299
series units are of lightweight aluminum frame
construction, designed to fit in the front of a container
and serve as the container’s front wall.
They are one piece, self-contained, all electric units
which includes cooling and heating systems to provide
precise temperature control.
The units are suppled with a complete charge of
refrigerant R-134a and compressor lubricating oil and
are ready for operation upon installation. Forklift
pockets are provided for unit installation and removal.
The base unit operates on nominal 380/460 volt, 3
phase, 50/60 hertz power. An optional autotransformer
may be fitted to allow operation on nominal 190/230 , 3
phase, 50/60 hertz power. Power for the control system
is provided by a transformer which steps the supply
power down to 18 and 24 volts, single phase.
The controller is a Carrier Transicold Micro-Link 3
microprocessor.
The
controller
will
operate
automatically to select cooling, holding or heating as
required to maintain the desired set point temperature
within very close limits. The unit may also be equipped
with a mechanical or electronic temperature recorder.
The controller has a keypad and display for viewing or
changing operating parameters. The display is also
equipped with lights to indicate various modes of
operation.
1.2 CONFIGURATION IDENTIFICATION
Unit identification information is provided on a plate
located near the compressor. The plate provides the
unit model number, the unit serial number and the unit
parts identification number (PID). The model number
identifies the overall unit configuration while the PID
provides information on specific optional equipment,
factory provision to allow for field installation of optional
equipment and differences in detailed parts.
Configuration identification for the models covered
herein are provided in the Carrier Transicold Container
Identification Matrix at the Carrier Web site,
www.container.carrier.com.
1.3 OPTION DESCRIPTION
Various options may be factory or field equipped to the
base unit. These options are listed in the tables and
described in the following subparagraphs.
1-1
T-317
1.3.11 Condenser Coil
The unit is fitted with a 3 row coil using 7mm tubing.
1.3.12 Autotransformer
An autotransformer may be provided to allow operation
on 190/230, 3phase, 50/60 hertz power. The
autotransformer raises the supply voltage to the
nominal 380/460 volt power required by the base unit.
The autotransformer may also be fitted with an
individual circuit breaker for the 230 volt power.
If the unit is equipped with an autoransformer and
communications module, the autotransformer will be
fitter with at transformer bridge unit (TBU) to assist in
communications.
1.3.13 Temperature Recorder
1.3.22 Upper Air (Fresh Air Make Up)
The unit may be fitted with an upper fresh air makeup
assembly. The fresh air makeup assembly is available
with a Vent Positioning Sensor (VPS) and may also be
fitted with screens.
1.3.23 Lower Air (Fresh Air Make Up)
The unit may be fitted with a lower fresh air makeup
assembly. The fresh air makeup assembly is available
with a Vent Positioning Sensor (VPS) and may also be
fitted with screens.
1.3.24 Arctic Mode
To improve operation in cold ambients, the unit may be
fitted with a crankcase heater. The crankcase heater is
operated, before start--up, to warm the compressor oil
and boil off any liquid refrigerant that may be present in
the crankcase.
1.3.25 Power Correction
The unit may be fitted with a set of power factor
correction capacitors to assist in correction of
imbalance in current draw by the compressor.
1.3.26 Evaporator
Evaporator section options include a semi--hermetic
thermal expansion valve, a hermetic thermal expansion
valve and two sizes of heat exchangers. The unit is
equipped with 6 heaters.
1.3.27 Labels
Operating Instruction and Function Code listing labels
will differ depending on the options installed. For
example, additional operating instructions are required
to describe start--up of a unit equipped with an
autotransformer. Where the labels are available with
additional languages, they are listed in the parts list.
1.3.28 Plate Set
Each unit is equipped with a tethered set of wiring
schematic and wiring diagram plates. The plate sets are
ordered using a seven digit base part number and a two
digit dash number.
1.3.29 Controller
Two different controllers are available:
1. Remanufactured -- Controller is the equivalent of a
new OEM controller and is supplied with a 12 month
warranty.
2. Repaired -- Controller has had previous faults
repaired and is upgraded with the latest software.
Note: Repaired controllers are NOT to be used for
warranty repairs only full OEM Remanufactured
controllers are to be used.
Controllers will be factory equipped with the latest
version of operational software. Controllers will NOT be
configured for a specific model number and will need to
be configured, at the time of installation or sale.
1.3.30 Condenser Grille
Two styles of condenser grilles are available, direct
bolted grilles and hinged grilles.
An electronic recorder manufactured by Partlow
Corporation may be fitted to the unit.
1.3.14 Gutters
Rain gutters may be fitted over the control box and
recorder section to divert rain away form the controls.
The different gutters include standard length bolted
gutters, extended length gutters and riveted gutters.
1.3.15 Handles
The unit may be equipped with handles to facilitate
access to stacked containers. These handles may
include fixed handles (located at the sides of the unit)
and/or a hinged handle at the center (attached to the
condenser coil cover).
1.3.16 Thermometer Port
The unit may be fitted with ports in the front of the frame
for insertion of a thermometer to measure supply and/or
return air temperature. If fitted, the port(s) will require a
cap and chain.
1.3.17 Water Cooling
The refrigeration system may be fitted with a water
cooled condenser. The condenser is constructed using
copper--nickel tube for sea water applications. The
water cooled condenser is in series with the air cooled
condenser and replaces the standard unit receiver.
When operating on the water cooled condenser, the
condenser fan is deactivated by either a water pressure
switch or condenser fan switch.
1.3.18 Back Panels
Back panel designs that may be fitted include panels of
aluminum and stainless steel. Panels may have access
doors and/or hinge mounting.
1.3.19 460 Volt Cable
Various power cable and plug designs are available for
the main 460 volt supply. The plug options tailor the
cables to each customers requirements.
1.3.20 230 Volt Cable
Units equipped with an autotransformer require an
additional power cable for connection to the 230 volt
source. Various power cable and plug designs are
available. The plug options tailor the cables to each
customers requirements.
1.3.21 Cable Restraint
Various designs are available for storage of the power
cables. These options are variations of the compressor
section front cover.
T-317
1-2
SECTION 2
DESCRIPTION
evaporator coil heaters. The unit model number, serial
number and parts identification number can be found on
the serial plate to the left of the compressor.
2.1 GENERAL DESCRIPTION
2.1.1 Refrigeration Unit -- Front Section
The unit is designed so that the majority of the
components are accessible from the front, see
Figure 2-1. The upper access panels allow entry into the
evaporator section, and the center access panel allows
access to the thermostatic expansion valve and
2.1.2 Fresh Air Makeup Vent
The function of the upper or lower makeup air vent is to
provide ventilation for commodities that require fresh air
circulation.
14
1
13
12
2
11
3
10
4
9
8
7
6
5
1.
2.
3.
4.
5.
6.
7.
8.
Access Panel (Evap. Fan #1)
Access Panel (Heater & Thermostatic
Expansion Valve)
Fork Lift Pockets
Control Box
Compressor
Unit Serial Number, Model Number and
Parts Identification Number (PID) Plate
Condenser Fan
TransFRESH Communications Connector
9.
10.
11.
12.
13.
14.
Interrogator Connector (Front right)
Temperature Recorder
Lower Fresh Air Makeup Vent Location
(Blank Cover Shown)
TIR (Transports Internationaux Routiers)
Sealing Provisions - Typical All Panels
Upper Fresh Air Makeup Vent
Access Panel (Evap. Fan #2)
Figure 2-1 Refrigeration Unit -- Front Section
2-1
T-317
The evaporator fans circulate air through the container
by pulling it in the top of the unit, directing it through the
evaporator coil, where it is heated or cooled, and
discharging it at the bottom.
2.1.3 Evaporator Section
The evaporator section (Figure 2-2) contains the
temperature recorder bulb or return recorder sensor,
return temperature sensor, thermostatic expansion
valve, dual-speed evaporator fans (EM1 and EM2),
evaporator coil and heater, drain pan heater, defrost
heaters, defrost temperature sensor, heat termination
thermostat, and heat exchanger.
3
The evaporator components are accessible by
removing the upper rear panel (as shown in the
illustration) or by removing the front access panels.
4
7
6
5
2
1
8
HTT Alternate Location
19
9
18
17
16
15
14
10
12
11
13
ALTERNATE USDA
LOCATION
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Evaporator Fan Motor #1
Return Recorder Sensor
Return Temperature Sensor
Humidity Sensor
Mechanical Recorder Bulb
Evaporator Fan Motor #2
Defrost Temperature Sensor
Heater Termination Thermostat
Evaporator Coil
Drain Pan Heater
Hermetic Thermostatic Expansion Valve
Semi--Hermetic Thermostatic Expansion Valve
Heat Exchanger
Interrogator Connector (Rear)
USDA Probe Receptacle PR2
USDA Probe Receptacle PR1
USDA Probe Receptacle PR3
Cargo Probe Receptacle PR4
Evaporator Coil Heaters
Figure 2-2 Evaporator Section
T-317
2-2
discharge
pressure
regulator
valve
discharge/suction pressure transducers.
2.1.4 Compressor Section
The compressor section includes the compressor (with
high pressure switch), power cable storage
compartment, and autotransformer.
This section also contains the suction modulating valve,
and
The supply temperature sensor, supply recorder sensor
and ambient sensor are located at the right side of the
compressor.
1
5
6
2
3
8
7
15
4
14
9
13
10
12
11
1.
2.
3.
4.
5.
6.
7.
8.
Power Autotransformer (TRANS)
Power Cables and Plug
Compressor Sight Glass View Port
Compressor Guard
Supply Temperature Sensor (STS)
Ambient Sensor (AMBS)
Discharge Pressure Regulator Valve
Suction Line Process Tube
9.
10.
11.
12.
13.
14.
15.
Quench Expansion Valve
Stepper Motor Suction Modulation Valve (SMV)
Suction Flange
Compressor Sight Glass
Compressor Motor (CP)
Discharge Flange
High Pressure Switch (HPS)
Figure 2-3 Compressor Section
2-3
T-317
line valve and filter-drier.
The condenser fan pulls air in the bottom of the coil and it
is discharged horizontally out through the condenser fan
grille.
2.1.5 Air Cooled Condenser Section
The air cooled condenser section (Figure 2-4) consists
of the condenser fan, condenser coil, receiver with sight
glass/moisture indicator, quench valve, manual liquid
6
7
5
2
3
4
1
8
11
9
10
1.
2.
3.
4.
5.
6.
Grille and Venturi Assembly
Condenser Fan
Key
Condenser Fan Motor
Condenser Coil Cover
Condenser Coil
7.
8.
9.
10.
11.
Condenser Motor Mounting Bracket
Receiver
Sight Glass/Moisture Indicator
Filter-Drier
Quench Valve
Figure 2-4 Condenser Section
T-317
2-4
quench expansion valve, rupture disc, condenser
pressure transducer, filter-drier, water couplings and
water pressure switch. The water cooled condenser
replaces the standard unit receiver.
2.1.6 Water-Cooled Condenser Section
The water-cooled condenser section (Figure 2-5)
consists of a water-cooled condenser, sight glass,
1
2
4
3
9
1.
2.
3.
4.
5.
Water-Cooled Condenser
Rupture Disc
Condenser Pressure Transducer (CPT)
Filter-Drier
Moisture Liquid Indicator/Sight Glass
8
6.
7.
8.
9.
7
6
5
Coupling (Water In)
Self Draining Coupling (Water Out)
Liquid Line Process Tube
Water Pressure Switch (WP)
Figure 2-5 Water-Cooled Condenser Section
2-5
T-317
2.1.7 Control Box Section
The control box (Figure 2-6) includes the manual
operation switches; circuit breaker (CB-1); compressor,
fan and heater contactors; control power transformer;
fuses; key pad; display module; current sensor module;
controller module and the communications interface
module.
1
2
18
1.
2.
3.
4.
5.
6.
7.
8.
9.
2.1.8 Communications Interface Module
The communications interface module is a slave
module which allow communication with a master
central monitoring station. The module will respond to
communication and return information over the main
power line. Refer to the master system technical manual
for further information.
3
17
16
15
14
4
13
12
5
11
6
10
9
Compressor Phase A Contactor
10. Interrogator Connector (Box Location)
Compressor Phase B Contactor
11. Fan Mode Switch
Heater Contactor
12. Emergency Bypass Switch
Display Module
13. Control Transformer
Communications Interface Module
14. Evaporator Fan Contactor - High
Controller/DataCORDER Module (Controller)
15. Evaporator Fan Contactor - Low
Key Pad
16. Condenser Fan Contactor
Remote Monitoring Receptacle
17. Circuit Breaker -- 460V
Controller Battery Pack
18. Current Sensor Module
Figure 2-6 Control Box Section
T-317
2-6
7
8
2.2 REFRIGERATION SYSTEM DATA
a. Compressor/Motor
Assembly
Number of Cylinders
Model
CFM
Weight (Dry)
Approved Oil
Oil Charge
Oil Sight Glass
Verify at --18 _C
(0 _F) container box
temperature
Opens
c. Heater Termination Thermostat
Closes
Cutout
d. High Pressure Switch
Cut-In
b. Expansion Valve Superheat
Unit Configuration
e. Refrigerant Charge
Water-Cooled
Condenser
Receiver
6
06DR
41
118 kg (260 lb)
Castrol Icematic SW--20
3.6 liters (7.6 U.S. pints)
The oil level range, with the compressor off,
should be between the bottom and one-eighth
level of the sight glass.
4.5 to 6.7 _C (8 to 12 _F)
54 (¦ 3) _C = 130 (¦ 5) _F
38 (¦ 4) _C = 100 (¦ 7) _F
25 (¦ 1.0) kg/cm@ = 350 (¦ 10) psig
18 (¦ 0.7) kg/cm@ = 250 (¦ 10) psig
Charge Requirements -- R-134a
3 row condenser
4.9 kg
(10.75 lbs)
4.0 kg
(8.8 lbs)
NOTE
When replacing the following components (f.), (g.) and (h.) , refer to the installation instructions included with
the replacement part for additional information.
Melting point
99 _C = (210 _F)
f. Fusible Plug*
Torque*
6.2 to 6.9 mkg (45 to 50 ft-lbs)
g. Sight Glass/Moisture Indicator Torque
8.9 to 9.7 mkg (65 to 70 ft-lbs)
Bursts at
35 ¦ 5% kg/cm@ = (500 ¦ 5% psig)
h. Rupture Disc
Torque
1.4 to 2 mkg (10 to 15 ft-lbs)
(P/N 14-00215-03)
The condenser fan will start if the condenser
pressure is greater than 14.06 kg/cm@ (200
Condenser Fan Starts psig) OR the condenser fan is OFF for more
than 60 seconds.
i. Condenser Pressure
Transducer
The condenser fan will stop if the condenser
pressure is less than 9.14 kg/cm@ (130 psig)
Condenser Fan Stops AND the condenser fan remains ON for at least
30 seconds.
j. Unit Weight
k. Water Pressure Switch
l. Discharge Pressure Regulator
Cut-In
Cutout
Factory Setting
Refer to unit model number plate.
0.5 ¦ 0.2 kg/cm@ (7 ¦ 3 psig)
1.6 ¦ 0.4 kg/cm@ (22 ¦ 5 psig)
32.7 ¦ 2.5 kg/cm@ (72¦ 5.5 psig)
* Rupture Disc, part number 14--00215--04 may be installed as an alternate for the receiver mounted fusible plug.
2-7
T-317
2.3 ELECTRICAL DATA
CB-1 Trips at
CB-2 (50 amp) Trips at
a. Circuit Breaker
CB-2 (70 amp) Trips at
b. Compressor
Full Load Amps (FLA)
Motor
Full Load Amps
Horsepower
Rotations Per Minute
Voltage and Frequency
Bearing Lubrication
Rotation
Number of Heaters
Rating
d. Drain Pan Heaters
Resistance (cold)
Type
Number of Heaters
Rating
e. Evaporator Coil
Heaters
Resistance (cold)
Type
c. Condenser Fan
Motor
f. Evaporator Fan
Motor(s)
g. Fuses
Full Load Amps
High Speed
Full Load Amps
Low Speed
Nominal Horsepower
High Speed
Nominal Horsepower
Low Speed
Rotations Per Minute
High Speed
Rotations Per Minute
Low Speed
Voltage and Frequency
Voltage & Frequency using power autotransformer
Bearing Lubrication
Rotation
Control Circuit
Controller/DataCORDER
Emergency Defrost
Drain Line Heater
Humidity Power
Transformer
29 amps
62.5 amps
87.5 amps
17.6 amps @ 460 vac
(with current limiting set at 21 amps)
380 vac, Single Phase,
460 vac, Single Phase,
50 hz
60 hz
1.3 amps
1.6 amps
0.43 hp
0.75 hp
1425 rpm
1725 rpm
360 -- 460 vac ¦ 2.5 hz
400 -- 500 vac ¦ 2.5 hz
Factory lubricated, additional grease not required.
Counter-clockwise when viewed from shaft end.
0 or 1
750 watts +5 /--10 % @ 460 vac
285 ¦ 7.5% ohms @ 20 _C (68 _F)
Sheath
6
750 watts +5/--10% each @ 230 vac
66.8 to 77.2 ohms @ 20 _C (68 _F)
Sheath
380 vac/50 hz
460 vac/60 hz
1.6
2.0
0.8
1.0
0.70
0.84
0.09
0.11
2850 rpm
3450 rpm
1425 rpm
1750 rpm
360 -- 460 vac ± 1.25 hz
400 -- 500 vac ± 1.5 hz
180 -- 230 vac ± 1.25hz
200 -- 250 vac ± 1.5 hz
Factory lubricated, additional grease not required
CW when viewed from shaft end
7.5 amps (F3A, F3B)
5 amps (F1 & F2)
5 amps (FED)
5 amps (FDH)
5 amps (FH)
h. Compressor Crankcase Heater
T-317
180 watts @ 460 vac
2-8
i. Humidity Sensor
Orange wire
Power
Red wire
Output
Brown wire
Ground
Input voltage
5 vdc
Output voltage
0 to 3.3 vdc
Output voltage readings verses relative humidity (RH) percentage:
30%
0.99 V
50%
1.65 V
70%
2.31 V
90%
2.97 V
j. Controller
Setpoint Range
--30 to +30 _C (--22 to +86 _F)
Open safety switch contacts on either or both of devices
IP-CP or HPS will shut down the compressor.
2.4 SAFETY AND PROTECTIVE DEVICES
Unit components are protected from damage by safety
and protective devices listed in the following table.
These devices monitor the unit operating conditions and
open a set of electrical contacts when an unsafe
condition occurs.
Open safety switch contacts on device IP-CM will shut
down the condenser fan motor.
The entire refrigeration unit will shut down if one of the
following safety devices open: (a) Circuit Breaker(s); (b)
Fuse (F3A&F3B/7.5A); or (c) Evaporator Fan Motor
Internal Protector(s) -- (IP-EM).
Table 2-1 Safety and Protective Devices
UNSAFE CONDITION
Excessive current draw
Excessive current draw in the
control circuit
SAFETY DEVICE
DEVICE SETTING
Circuit Breaker (CB-1) -- Manual Reset
Trips at 29 amps (460 vac)
Circuit Breaker (CB-2, 50 amp) --Manual Reset
Trips at 62.5 amps (230 vac)
Circuit Breaker (CB-2, 70 amp) --Manual Reset
Trips at 87.5 amps (230 vac)
Fuse (F3A & F3B)
7.5 amp rating
Excessive current draw by the
Fuse (F1 & F2)
controller
5 amp rating
Excessive current draw by the
Fuse (FED)
emergency defrost circuit
5 amp rating
Excessive condenser fan motor winding temperature
Internal Protector (IP-CM) -- Automatic Reset
N/A
Excessive compressor motor
winding temperature
Internal Protector (IP-CP) -- Automatic Reset
N/A
Excessive evaporator fan motor(s) winding temperature
Internal Protector(s) (IP-EM) -- Automatic Reset
N/A
Abnormal pressures/temperatures in the high refrigerant
side
Abnormally high discharge
pressure
Fusible Plug -- Used on the Receiver
99 _C = (210 _F)
Rupture Disc -- Used on the Water-Cooled Condenser
35 kg/cm@ = (500 psig)
High Pressure Switch (HPS)
Opens at 25 kg/cm@
(350 psig)
2-9
T-317
outlet. The valve maintains a constant superheat at the
coil outlet regardless of load conditions.
During periods of low load, the suction modulating valve
decreases flow of refrigerant to the compressor. This
action balances the compressor capacity with the load
and prevents operation with low coil temperatures. In
this mode of operation, the quench valve will open as
required to provide sufficient liquid refrigerant flow into
the suction line for cooling of the compressor motor. The
quench valve senses refrigerant condition entering the
compressor and modulates the flow to prevent entrance
of liquid into the compressor.
The refrigeration system is also fitted with a condenser
pressure transducer which feeds information to the
controller. When operating on the air cooled condenser,
the controller programming will operate the condenser
fan so as to attempt to maintain discharge pressures
above 130 psig in low ambients. At ambients below
27_C (80_F), the condenser fan will cycle on and off
depending on condenser pressure and operating times.
1 The condenser fan will start if the condenser pressure is greater than 200 psig OR the condenser fan
has been OFF for more than 60 seconds.
2 The condenser fan will stop if the condenser pressure is less than 130 psig AND the condenser fan
has been running for at least 30 seconds.
At ambients above 27_C (80_F), condenser pressure
control is disabled and the condenser fan runs
continuously.
On systems fitted with a water pressure switch, the
condenser fan will be off when there is sufficient
pressure to open the switch. If water pressure drops
below the switch cut out setting, the condenser fan will
be automatically started. When operating a system
fitted with a condenser fan switch, the condenser fan will
be off when the switch is placed in the “O” position. The
condenser fan will be on when the switch is placed in the
“I” position.
2.5 REFRIGERATION CIRCUIT
Starting at the compressor, (see Figure 2-7, upper
schematic) the suction gas is compressed to a higher
pressure and temperature.
The gas flows through the discharge service valve into
the pressure regulator valve. During periods of low
ambient operation, the pressure regulator valve
modulates the flow of refrigerant to maintain a pre set
minimum discharge pressure. Refrigerant gas then
moves into the air-cooled condenser. When operating
with the air-cooled condenser active, air flowing across
the coil fins and tubes cools the gas to saturation
temperature. By removing latent heat, the gas
condenses to a high pressure/high temperature liquid
and flows to the receiver which stores the additional
charge necessary for low temperature operation.
When operating with the water cooled condenser active
(see Figure 2-7, lower schematic), the refrigerant gas
passes through the air cooled condenser and enters the
water cooled condenser shell. The water flowing inside
the tubing cools the gas to saturation temperature in the
same manner as the air passing over the air cooled
condenser. The refrigerant condenses on the outside of
the tubes and exits as a high temperature liquid. The
water cooled condenser also acts as a receiver, storing
excess refrigerant.
The liquid refrigerant continues through the liquid line
service valve, the filter-drier (which keeps refrigerant
clean and dry), and a heat exchanger (that increases
subcooling of the liquid) to the thermostatic expansion
valve. As the liquid refrigerant passes through the
variable orifice of the expansion valve, some of it
vaporizes into a gas (flash gas). Heat is absorbed from
the return air by the balance of the liquid, causing it to
vaporize in the evaporator coil. The vapor then flows
through the suction modulating valve to the compressor.
The thermostatic expansion valve is activated by the
bulb strapped to the suction line near the evaporator
T-317
2-10
5
7
6
4
8
2
3
1
15
16
10
12
17
9
14
17
Circuit with Receiver
5
7
1.High Pressure Switch
2.Discharge Pressure
Regulator Valve
3.Air-Cooled Condenser
4.Evaporator
5. Thermostatic
Expansion Valve
6. External Equalizer Line
7. Hermetic Thermostatic
Expansion Valve Bulb
8.Heat Exchanger
9. Rupture Disc
10. Moisture-Liquid Indicator
11. Condenser Pressure
Transducer (CPT)
12. Filter-Drier
13. Water-Cooled Condenser
14. Receiver
15. Suction Modulation Valve
(SMV)
16. Quench Expansion Valve
17. Process Tube
6
4
8
9
3
2
11
15
1
10
13
12
17
17
16
Circuit with Water Cooled Condenser
Figure 2-7 Refrigeration Circuit Schematic
2-11
T-317
SECTION 3
MICROPROCESSOR
and cargo temperature parameters for future retrieval.
Coverage of the temperature control software begins
with paragraph 3.2. Coverage of the DataCORDER
software is provided in paragraph 3.6.
3.1 TEMPERATURE CONTROL MICROPROCESSOR SYSTEM
The temperature control Micro-Link 3 microprocessor
system (see Figure 3- 1) consists of a key pad, display
module, control module (controller) and interconnecting
wiring. The controller houses the temperature control
software and the DataCORDER Software. The
temperature control software functions to operate the
unit components as required to provide the desired
cargo temperature and humidity. The DataCORDER
software functions to record unit operating parameters
The key pad and display module serve to provide user
access and readouts for both of the controller functions,
temperature control and DataCORDER. The functions
are accessed by key pad selections and viewed on the
display module. The components are designed to
permit ease of installation and removal.
CONTROL MODULE
DISPLAY MODULE
TEMPERATURE CONTROL SOFTWARE
KEY PAD
CONFIGURATION
SOFTWARE
CONFIGURATION
VARIABLE
(CnF##)
OPERATIONAL
SOFTWARE
FUNCTION
CODE (Cd)
ALARMS
(AL<70)
PRE--TRIP
INTERROGATION
CONNECTOR
TO
DISPLAY
DATAREADER
DataCORDER SOFTWARE
CONFIGURATION
SOFTWARE
OPERATIONAL
SOFTWARE
CONFIGURATION
VARIABLE
(dCF## read only)
FUNCTION
CODE (dC)
DATA
STORAGE
MEMORY
ALARMS
(AL>69)
Computer Device
With DataLine
Software
TO
DISPLAY
(Scrollback)
TO
DISPLAY
Figure 3- 1 Temperature Control System
3-1
T-317
Table 3-1 Key Pad Function
3.1.1 Key Pad
The key pad (Figure 3- 2) is mounted on the right-hand
side of the control box. The key pad consists of eleven
push button switches that act as the user’s interface
with the controller. Descriptions of the switch functions
are provided in Table 3-1.
KEY
Code Select Accesses function codes.
Pre-Trip
Alarm List
CODE
SELECT
PRE
TRIP
ALARM
LIST
MANUAL
DEFROST/
INTERVAL
FUNCTION
Manual
Defrost/
Defrost
Interval
Enter
Arrow Up
ENTER
Displays the pre-trip selection menu.
Discontinues pre-trip in progress.
Displays alarm list and clears the
alarm queue .
Displays selected defrost mode. Depressing and holding the Defrost interval key for five (5) seconds will initiate defrost using the same logic as
if the optional manual defrost switch
was toggled on.
Confirms a selection or saves a
selection to the controller
Change or scroll a selection upward
Pre-trip advance or test interruption.
Change or scroll a selection downArrow Down ward. Pre-trip repeat backward
Return/
Supply
RETURN
SUPPLY
_C
_F
BATTERY
POWER
ALT.
MODE
Figure 3- 2 Key Pad
COOL
HEAT DEFROST IN RANGE ALARM
SETPOINT/Code
Battery
Power
Initiate battery backup mode to allow
set point and function code selection
if AC power is not connected.
ALT. Mode
This key is pressed to switch the
functions from the temperature software to the DataCORDER Software.
The remaining keys function the
same as described above except the
readings or changes are made to the
DataCORDER programming.
NOTE
The controlling probe in the perishable range
will be the SUPPLY air probe and the controlling
probe in the frozen range will be the RETURN
air probe.
Figure 3- 3 Display Module
3.1.2 Display Module
5. Supply -- Yellow LED: Energized when the supply air
probe is used for control. When this LED is illuminated,
the temperature displayed in the AIR TEMPERATURE
display is the reading at the supply air probe. This LED
will flash if dehumidification or humidification is enabled.
The display module (Figure 3- 3) consists of five digit
displays and seven indicator lights. The indicator lights
include:
1. Cool -- White LED: Energized when the refrigerant
compressor is energized.
6. Return -- Yellow LED: Energized when the return air
probe is used for control. When this LED is illuminated,
the temperature displayed in the AIR TEMPERATURE
display is the reading at the return air probe. This LED
will flash if dehumidification or humidification is enabled.
2. Heat -- Orange LED: Energized to indicate heater operation in the heat or defrost mode.
3. Defrost -- Orange LED: Energized when the unit is in
the defrost mode.
4. In-Range -- Green LED: Energized when the controlled temperature probe is within specified tolerance
of set point.
T-317
_C/_F
Displays alternate English/Metric
scale (momentary display). When set
to _F, pressure is displayed in psig
and vacuum in “/hg. “P” appears after
the value to indicate psig and “i” appears for inches of mercury.
When set to _C. pressure readings
are in bars. “b” appears after the value to indicate bars.
SUPPLY RETURN
AIR TEMPERATURE/Data
Displays non-controlling probe temperature (momentary display).
7. Alarm -- Red LED: Energized when there is an active
or an inactive shutdown alarm in the alarm queue.
3-2
1
1.
2.
2
3
3
4
5
Mounting Screw
Micro-Link 3
Controller
Connectors
Test Points
3
6
7
3
8
3
5.
6.
Fuses
Control Circuit Power Connection
(Location: In back of controller)
3.
7. Software Programming Port
4.
8. Battery Pack
Figure 3- 4 Micro-Link 3 Controller
3.1.3 Controller
clear build up of frost and ice from the coil to ensure
continuous conditioned air delivery to the load.
b. Provide default independent readouts of set point and
supply or return air temperatures.
CAUTION
c. Provide ability to read and (if applicable) modify the
Do not remove wire harnesses from conConfiguration Software Variables, Operating Software Function Codes and Alarm Code Indications.
troller unless you are grounded to the unit
frame with a static safe wrist strap.
d. Provide a Pre-Trip step-by-step checkout of refrigeration unit performance including: proper component
operation, electronic and refrigeration control operation, heater operation, probe calibration, pressure
CAUTION
limiting and current limiting settings.
e. Provide battery powered ability to access or change
Unplug all controller wire harness connecselected codes and set point without AC power contors before performing arc welding on any
nected
part of the container.
f. Provide the ability to reprogram the software through
the use of a memory card.
NOTE
3.2.1 Configuration Software (Configuration VariDo not attempt to service the controller. Breakables)
ing the seal will void the warranty.
The Configuration Software is a variable listing of the
components available for use by the Operational
Software. This software is factory installed in
accordance with the equipment fitted and options listed
CAUTION
on the original purchase order. Changes to the
Configuration Software are required only when the
Do not attempt to use an ML2i PC card in an
original software has been lost or a physical change has
ML3 equipped unit. The PC cards are physically
been made to the unit such as the addition or removal of
different and will result in damage to the controlan option. A Configuration Variable list is provided in
ler.
Table 3-4 (page 3-13). Change to the factory installed
Configuration Software is achieved via a configuration
The Micro--Link 3 controller is a single module
card.
microprocessor as shown in Figure 3- 4. It is fitted with
3.2.2 Operational Software (Function Codes)
test points, harness connectors and a software card
programming port.
The Operational Software is the actual operation
programming of the controller which activates or
deactivates components in accordance with current unit
3.2 CONTROLLER SOFTWARE
operation conditions and operator selected modes of
The controller software is a custom designed program
operation.
that is subdivided into the Configuration Software and
The programming is divided into function codes. Some
the Operational Software. The controller software
of the codes are read only while the remaining codes
performs the following functions:
may be user configured. The value of the user
a. Control supply or return air temperature to required
configurable codes can be assigned in accordance with
limits, provide modulated refrigeration control, elecuser desired mode of operation. A list of the function
tric heat control and defrost. Defrost is performed to
codes is provided in Table 3-5 (page 3-14)
3-3
T-317
below the frozen setpoint and then adjust to 24 hours
thereafter.
All defrost interval times reflect the number of
compressor runtime hours since the last defrost de--ice
cycle.
The minimum defrost interval under the
automatic setting is 3 hours while the maximum is 24. In
frozen mode the amount of wall--clock time necessary to
accumulate a given amount of defrost interval time will
exceed the defrost interval time by a factor of two to
three depending on the compressor duty--cycle.
Defrost interval time is not accumulated in any mode
until the defrost termination sensor reads less than
10_C (50_F).
3.3.4 Failure Action
Function code Cd29 may be operator set to allow
continued operation in the event the control sensors are
reading out of range. The factory default is full system
shutdown. (Refer to Table 3-5, page 3-14).
3.3.5 Generator Protection
Function codes Cd31 and Cd32 may be operator set to
control start up sequence of multiple units and operating
current draw. The factory default allows on demand
starting of units and full current draw. (Refer to
Table 3-5, page 3-14).
3.3.6 Condenser Pressure Control
When configuration variable CnF14 is set to “In” the
condenser pressure control logic is activated to
maintain discharge pressures above 130 psig in low
temperature ambients. The logic turns the condenser
fan on or off in accordance with the condenser pressure
transducer reading. (Refer to Table 3-4, page 3-13.)
The function is enabled when the following conditions
are met:
1. The ambient sensor reading is less than or equal to
27_C (80_F)
2. Voltage/Frequency ratio is less than or equal to 8.38
When the above conditions are met, either pressures or
timers may dictate a change of state from OFF to ON, or
ON to OFF. If the condenser fan is OFF, it will be
energized if saturated condensing pressure is greater
than 200 psig OR if the condenser fan has been OFF for
a variable time period of up to sixty seconds depending
on the ambient temperature. As the ambient
temperature increases, the amount of time that the
condenser fan is energized will correspondingly
increase towards the maximum
If the condenser fan is ON, it will de-energize only if the
saturated condensing pressure is less than 130 psig
and the condenser fan has been running for a minimum
of thirty seconds depending on the ambient
temperature.
3.3.7 Arctic Mode
With arctic mode enabled, (configuration variable
CnF29 set to “In”) there will be a 30 minute time delay at
startup if the ambient is colder than --10.0_C. (14 °F)
When the START/STOP switch is placed in the “I” (ON)
position the controller will energize the compressor
crankcase heater . Operation of the heater will warm the
oil and boil off any liquid refrigerant that may be present
in the crankcase.
If Pre-Trip is initiated during the 30 minute time period,
Pre-Trip will be allowed to run normally. Once Pre-Trip is
over, the controller will revert to its normal control mode
logic. Refer to Table 3-4, page 3-13.
To access the function codes, perform the following:
a. Press the CODE SELECT key, then press an arrow
key until the left window displays the desired code
number.
b. The right window will display the value of this item for
five seconds before returning to the normal display
mode.
c. If a longer time is desired, press the ENTER key to
extend the time to 30 seconds.
3.3 MODES OF OPERATION
The Operational Software responds to various inputs.
These inputs come from the temperature and pressure
sensors, the temperature set point, the settings of the
the configuration variables and the function code
assignments. The action taken by the Operational
Software will change if any one of the inputs changes.
Overall interaction of the inputs is described as a “mode”
of operation. The modes of operation include,
perishable (chill) mode and frozen mode. Descriptions
of the controller interaction and modes of operation are
provided in the following sub paragraphs.
3.3.1 Temperature Control -- Perishable Mode
With configuration variable CnF26 (Heat Lockout
Temperature) set to --10_C the perishable mode of
operation is active with set points above --10_C (+14_F).
With the variable set to --5_C, the perishable mode is
active above --5_C (+23_F). Refer to Table 3-4, page
3-13.
When in the perishable mode the controller maintains
the supply air temperature at set point, the SUPPLY
indicator light will be illuminated on the display module
and the default reading on the display window will be the
supply temperature sensor reading.
When the supply air temperature enters the in-range
temperature tolerance (as selected at function code
Cd30), the in-range light will energize.
3.3.2 Evaporator Fan Operation
Opening of an evaporator fan internal protector will shut
down a unit with Normal Evaporator Fan Operation.
(CnF32 set to 2EFO). On units equipped with Single
Evaporator Fan Capability (CnF32 set to 1EFO)
additional relays are installed to allow the unit to
continue to operate on a single fan. (Refer to Table 3-4,
page 3-13).
3.3.3 Defrost Interval
Controller function code Cd27 sets two modes for
defrost initiation, either user--selected timed intervals or
automatic control. The user--selected values are 3, 6, 9,
12, or 24 hours and the factory default for the timed
interval is 12 hours (some units may be configured to
allow defrost to be disabled altogether; in this case a
user--selected value of OFF will be available). Refer to
Table 3-5.
In perishable mode, perishable--pulldown mode, or
frozen--pulldown mode, automatic defrost starts with an
initial defrost set to 3 hours and then adjusts the interval
to the next defrost based on the accumulation of ice on
the evaporator coil. In this way, defrosts are scheduled
to occur only when necessary.
Once setpoint has been reached in frozen operation, the
automatic selection will set the time interval to 12 hours
for the first two defrosts once the return probe is reading
T-317
3-4
1. The humidity sensor reading is above the set point.
2. The Supply air temperature is less than 0.25_C
above set point.
3. The heater debounce timer (three minutes) has
timed out.
4. Heater termination thermostat (HTT) is closed.
If the above conditions remain true for at least one hour
the evaporator fans will switch from high to low speed
operation. The evaporator fan speed will switch every
hour thereafter as long as all conditions are met (see
Bulb Mode section for different evaporator fan speed
options). If any condition except for item (1) becomes
false OR if the relative humidity sensed is 2% below the
dehumidification set point, the high speed evaporator
fans will be energized.
In the dehumidification mode power is applied to the
defrost and drain pan heaters. This added heat load
causes the controller to open the suction modulating
valve to match the increased heat load while still holding
the supply air temperature very close to the set point.
Opening the modulating valve reduces the temperature
of the evaporator coil surface, which increases the rate
at which water is condensed from the passing air.
Removing water from the air reduces the relative
humidity. When the relative humidity sensed is 2%
below the set point , the controller de-energizes the heat
relay. The controller will continue to cycle heating to
maintain relative humidity below the selected set point.
If the mode is terminated by a condition other than the
humidity sensor, e.g., an out-of-range or compressor
shutdown condition, the heat relay is de-energized
immediately.
Two timers are activated in the dehumidification mode
to prevent rapid cycling and consequent contactor wear.
They are:
1. Heater debounce timer (three minutes).
2. Out-of-range timer (five minutes).
The heater debounce timer is started whenever the
heater contactor status is changed. The heat contactor
remains energized (or de-energized) for at least three
minutes even if the set point criteria are satisfied.
The out-of-range timer is started to maintain heater
operation during a temporary out-of-range condition. If
the supply air temperature remains outside of the user
selected in-range setting for more than five minutes, the
heaters will be de-energized to allow the system to
recover. The out-of-range timer starts as soon as the
temperature exceeds the in-range tolerance value set
by function code Cd30.
3.3.11 Perishable, Dehumidification -- Bulb Mode
Bulb mode is an extension of the dehumidification mode
which allows changes to the evaporator fan speed
and/or defrost termination set points.
Bulb mode is active when configuration code Cd35 is set
to “Bulb”. Once the bulb mode is activated, the user may
then change the dehumidification mode evaporator fan
operation from the default (speed alternates from low to
high each hour) to constant low or constant high speed.
This is done by toggling function code Cd36 from its
default of “alt” to “Lo” or “Hi” as desired. If low speed
evaporator fan operation is selected, this gives the user
the additional capability of selecting dehumidification
set points from 60 to 95% (instead of the normal 65 to
95%).
3.3.8 Perishable Mode -- Conventional
The unit is capable of maintaining supply air
temperature to within ¦0.25_C (¦0.5_F) of set point.
Supply air temperature is controlled by positioning of the
suction modulation valve (SMV), cycling of the
compressor and cycling of the heaters.
When pulling down from a temperature that is more than
5_C (9_F) above set point, the SMV will open to reduce
the pulldown time. However, pressure and current limit
functions may restrict the valve, if either exceeds the
preset value.
The Operational Software is designed so the SMV will
begin to close as the set point is reached. The SMV will
continue to close and restrict refrigerant flow until the
capacity of the unit and the load are balanced.
If the temperature drops below the set point, the
compressor will remain running for a few minutes. This
is to accommodate any initial undershoot which might
occur. After this time has expired and the temperature is
0.2_C (0.4_F) or greater below the set point, the
compressor will be turned OFF.
If the temperature drops to 0.5_C (0.9_F) below set
point, the heaters will be energized . The heaters will
de-energize when the temperature rises to 0.2_C
(0.4_F) below the set point. The compressor will not
restart until the temperature rises to 0.2_C (0.4_F)
above the set point and three minutes have elapsed
since the last compressor turn off.
3.3.9 Perishable Mode -- Economy
The economy mode is an extension of the conventional
mode and is applicable to units with two speed
evaporator fan motors. The mode is activated when the
setting of function code Cd34 is “ON”. Economy mode is
provided for power saving purposes. Economy mode
could be utilized in the transportation of temperature
tolerant cargo or non-respiration items which do not
require high airflow for removing respiration heat. There
is no active display indicator that economy mode has
been activated. To check for economy mode, perform a
manual display of code Cd34.
In order to achieve economy mode, a perishable set
point must be selected prior to activation. When
economy mode is active, the evaporator fans will be
controlled as follows:
At the start of each cooling or heating cycle, the
evaporator fans will be run in high speed for three
minutes. They will then be switched to low speed any
time the supply air temperature is within ¦ 0.25_C
(0.45_F) of the set point and the return air temperature
is less than or equal to the supply air temperature + 3_C
(5.4_F). The fans will continue to run in low speed for
one hour. At the end of the hour, the evaporator fans will
switch back to high speed and the cycle will be repeated.
3.3.10 Perishable Mode -- Dehumidification
The dehumidification mode is provided to reduce the
humidity levels inside the container. The mode is
activated when a humidity value is set at at function
code Cd33. The display module SUPPLY led will flash
ON and OFF every second to indicate that the
dehumidification mode is active. Once the Mode is
active and the following conditions are satisfied, the
controller will activate the heat relay to begin
dehumidification.
3-5
T-317
compressor will restart. Under a condition of rapidly
changing return air temperature, the time delay may
allow the return air temperature to rise slightly above set
point temperature before the compressor can restart.
3.3.14 Frozen Mode -- Economy
In order to activate economy frozen mode operation, a
frozen set point temperature must be selected. The
economy mode is active when function code Cd34 is set
to “ON”. When economy mode frozen is active, the
system will perform normal frozen mode operations
except that the entire refrigeration system, excluding
the controller, will be turned off when the control
temperature is less than or equal to the set point -- 2_C.
After an off-cycle period of 60 minutes, the unit will turn
on high speed evaporator fans for three minutes, and
then check the control temperature. If the control
temperature is greater than or equal to the set point +
0.2_C., the unit will restart the refrigeration system and
continue to cool until the previously mentioned off-cycle
temperature criteria are met. If the control temperature
is less than the set point + 0.2_C, the unit will turn off the
evaporator fans and restart another 60 minute off-cycle.
In addition, if bulb mode is active, function code Cd37
may be set to override the previous defrost termination
thermostat settings. (Refer to paragraph 4.10.4) The
temperature at which the defrost termination thermostat
will be considered “open” may be changed [in 0.1_C
(0.2_F) increments] to any value between 25.6_C
(78_F) and 4_C (39.2_F). The temperature at which the
defrost termination thermostat is considered closed for
interval timer start or demand defrost is 10_C (50_F) for
“open values from 25.6_C down to a 10_C setting. For
“open” values lower than 10_C, the “closed” values will
decrease to the same value as the “open” setting.
Bulb mode is terminated when:
1. Bulb mode code Cd35 is set to “Nor.”
2. Dehumidification code Cd33 is set to “Off.”
3. The user changes the set point to one
that is in the frozen range.
When bulb mode is disabled by any of the above, the
evaporator fan operation for dehumidification reverts to
“alt” and the DTS termination setting resets to the value
determined by controller configuration variable CnF41.
3.4 CONTROLLER ALARMS
Alarm display is an independent controller software
function. If an operating parameter is outside of
expected range or a components does not return the
correct signals back to the controller an alarm is
generated. A listing of the alarms is provided in
Table 3-6, page 3-18.
The alarm philosophy balances the protection of the
refrigeration unit and that of the refrigerated cargo. The
action taken when an error is detected always considers
the survival of the cargo. Rechecks are made to confirm
that an error actually exists.
Some alarms requiring compressor shutdown have
time delays before and after to try to keep the
compressor on line. An example is alarm code “LO”,
(low main voltage), when a voltage drop of over 25%
occurs, an indication is given on the display, but the unit
will continue to run.
An alarm is indicated by flashing an alarm code on the
display panel, and for some alarms, by the alarm light
illuminating.
When an Alarm Occurs:
a. The red alarm light will illuminate for “20 series”
alarms.
b. If a detectable problem is found to exist, its alarm
code will be alternately displayed with the set point on
the left display.
c. The user should scroll through the alarm list to determine what alarms exist or have existed. Alarms must
be diagnosed and corrected before the Alarm List can
be cleared.
To Display Alarm Codes :
a. While in the Default Display mode, press the ALARM
LIST key. This accesses the Alarm List Display Mode,
which displays any alarms archived in the Alarm
Queue.
b. The alarm queue stores up to 16 alarms in the sequence in which they occurred. The user may scroll
through the list by depressing an ARROW key.
c. The left display will show “AL##,” where ## is the
alarm number sequentially in the queue.
3.3.12 Temperature Control -- Frozen Mode
With configuration variable CnF26 set to --10_C the
frozen mode of operation is active with set points at or
below --10_C (+14_F). With the variable set to --5_C, the
frozen mode is active at or below --5_C (+23_F).
When in the frozen mode the controller maintains the
return air temperature at set point, the RETURN
indicator light will be illuminated on the display module
and the default reading on the display window will be the
return air probe reading.
When the return air temperature enters the in-range
temperature tolerance as selected at function code
Cd30, the in-range light will energize.
3.3.13 Frozen Mode -- Conventional
Frozen range cargos are not sensitive to minor
temperature changes. The method of temperature
control employed in this range takes advantage of this
fact to greatly improve the energy efficiency of the unit.
Temperature control in the frozen range is
accomplished by cycling the compressor on and off as
the load demand requires. The unit will operate in the
conventional frozen mode when the controller set point
is at or below the frozen range and function code CD34
is set to “OFF”
If the return air temperature in the container drops 0.2_C
(0.4_F) below the set point, the compressor is cycled
off. When the temperature is greater than 0.2_C (0.4_F)
above the set point and the three minute time delay has
been met, the compressor will restart. The unit will
always operate at full capacity, and the suction
modulation valve will open as allowed by current and
pressure limiting.
NOTE
On start up of the unit, SMV will reset to a known
open position. This is accomplished by assuming the valve was fully open, driving it fully
closed, resetting the percentage open to zero,
then opening to a known 21% staging position.
To prevent rapid cycling of the compressor, a three
minute compressor off time must be satisfied before the
T-317
3-6
d. The right display will show the actual alarm code.
“AA##” will display for an active alarm, where “##” is
the alarm code. Or “IA##” will display for an inactive
alarm, See Table 3-6, page 3-18,
Transicold Data Reader to down load data. A personal
computer with Carrier Transicold Data View software
may also be used to download data and configure
settings. The DataCORDER consists of:
Configuration Software
Operational Software
Data Storage Memory
Real Time Clock (with internal battery backup)
Six thermistor inputs
Interrogation Connections
Power supply (battery pack).
e. “END” is displayed to indicate the end of the alarm list
if any alarms are active.
f. “CLEAr” is displayed if all alarms are inactive. The
alarm queue may than be cleared by pressing the ENTER key. The alarm list will clear and “-- -- -- -- -- ” will
be displayed.
NOTE
AL26 is active when all of the sensors are not
responding. Check the connector at the back of
the controller, if it is loose or unplugged, reconnect it. Then run a pretrip test (P5) to clear
AL26.
The DataCORDER performs the following functions:
a. Logs data at 15, 30, 60 or 120 minute intervals and
stores two years’ of data (based on one hour interval).
b. Records and displays alarms on the display module.
c. Records results of pre--trip testing.
d. Records DataCORDER and temperature control
software generated data and events as follows:
Container ID Change
Software Upgrades
Alarm Activity
Battery Low (Battery Pack)
Data Retrieval
Defrost Start and End
Dehumidification Start and End
Power Loss (w/wo battery pack)
Power Up (w/wo battery pack)
Remote Probe Temperatures in the Container
(USDA Cold treatment and Cargo probe recording)
Return Air Temperature
Set Point Change
Supply Air Temperature
Real Time Clock Battery (Internal Battery) Replacement
Real Time Clock Modification
Trip Start
ISO Trip Header (When entered via Interrogation
program)
Economy Mode Start and End
“Auto 2” Pre-Trip Start and End
Bulb Mode Start
Bulb Mode changes
Bulb Mode End
USDA Trip Comment
Humidification Start and End
USDA Probe Calibration
3.6.2 DataCORDER Software
The DataCORDER Software is subdivided into the
Configuration Software, Operational Software and the
Data Memory.
a. Operational Software
The Operational Software reads and interprets inputs
for use by the Configuration Software. The inputs are
labeled Function Codes. There are 35 functions (see
Table 3-8, page 3-25) which the operator may access to
examine the current input data or stored data. To access
these codes, do the following:
1 Press the ALT. MODE & CODE SELECT keys.
2 Press an arrow key until the left window displays the
desired code number. The right window will display
the value of this item for five seconds before returning
to the normal display mode.
3 If a longer time is desired, press the ENTER key to
extend the time to 30 seconds.
3.5. UNIT PRE-TRIP DIAGNOSTICS
Pre--Trip Diagnostics is an independent controller
function which will suspend normal refrigeration
controller activities and provide preprogrammed test
routines. The test routines include Auto Mode testing,
which automatically preforms a pre programmed
sequenced of tests, or Manual Mode testing, which
allows the operator to select and run any of the
individual tests.
CAUTION
Pre-trip inspection should not be performed with critical temperature cargoes in
the container.
CAUTION
When Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated.
At the completion of Pre-Trip activity, dehumidification and bulb mode must be reactivated.
Testing may be initiated by use of the Key Pad or via
communication, but when initiated by communication
the controller will execute the entire battery of tests
(auto mode).
At the end of a pre-trip test, the message “P,” “rSLts”
(pretest results) will be displayed. Pressing the ENTER
key will allow the user to see the results for all subtests.
The results will be displayed as “PASS” or “FAIL” for all
the tests run to completion.
A detailed description of the pre-trip tests and test codes
is provided in Table 3-7, page 3-21. detailed operating
instructions are provided in paragraph 4.8.
3.6 DataCORDER
3.6.1 Description
The Carrier Transicold “DataCORDER,” software is
integrated into the controller and serves to eliminate the
temperature recorder and paper chart. The
DataCORDER functions may be accessed by key pad
selections and viewed on the display module. The unit is
also fitted with interrogation connections (see
Figure 3- 1) which may be used with the Carrier
3-7
T-317
Table 3-2 DataCORDER Configuration Variables
CONFIGURATION NO.
dCF01
dCF02
dCF03
dCF04
dCF05
dCF06
dCF07
dCF08
dCF09
dCF10
TITLE
(Future Use)
Sensor Configuration
Logging Interval (Minutes)
Thermistor Format
Thermistor Sampling Type
Controlled Atmosphere/Humidity Sampling Type
Alarm Configuration USDA Sensor 1
Alarm Configuration USDA Sensor 2
Alarm Configuration USDA Sensor 3
Alarm Configuration Cargo Sensor
5.
6.
7.
8.
9.
10.
b. Configuration Software
The configuration software controls the recording and
alarm functions of the DataCORDER. Reprogramming
to the factory installed configuration is achieved via the
same configuration card as the unit control module
software. Changes to the software may be made made
using the Data View integration device. A listing of the
configuration variables is provided in Table 3-2.
Descriptions of DataCORDER operation for each
variable setting are provided in the following
paragraphs.
11.
12.
13.
14.
15.
16.
17
18.
19.
20.
3.6.3 Sensor Configuration (dCF02)
Two modes of operation may be configured, the
Standard Mode and the Generic Mode.
a. Standard Mode
In the standard mode, the user may configure the
DataCORDER to record data using one of seven
standard configurations. The seven standard
configuration variables, with their descriptions, are
listed in Table 3-3.
The six thermistor inputs (supply, return, USDA #1, #2,
#3 and cargo probe) and the humidity sensor input will
be generated by the DataCORDER. An example of a
report using a standard configuration is shown in
Figure 3- 5.
OPTION
---2,5,6,9,54,64,94
15,30,60,120
Low, Normal
A,b,C
A,b
Auto, On, Off
Auto, On, Off
Auto, On, Off
Auto, On, Off
Phase A current
Phase B current
Phase C current
Main voltage
Suction modulation valve percentage
Discrete outputs (Bit mapped -- require special
handling if used)
Discrete inputs (Bit mapped -- require special
handling if used)
Ambient sensor
Compressor suction sensor
Compressor discharge sensor
Return temperature sensor
Supply temperature sensor
Defrost temperature sensor
Discharge pressure transducer
Suction pressure transducer
Condenser pressure transducer
Table 3-3 DataCORDER Standard Configurations
Standard
Config.
2 sensors
(dCF02=2)
5 sensors
(dCF02=5)
NOTE
The DataCORDER software uses the supply
and return recorder sensors. The temperature
control software uses the supply and return
temperature sensors.
Description
2 thermistor inputs(supply & return)
2 thermistor inputs(supply & return)
3 USDA thermistor inputs
6 sensors
(dCF02=6)
2 thermistor inputs(supply & return)
3 USDA thermistor inputs
1 humidity input
9 sensors
(dCF02=9)
Not Applicable
6 sensors 2 thermistor inputs(supply & return)
(dCF02=54) 3 USDA thermistor inputs
1 cargo probe (thermistor input)
2 thermistor inputs(supply & return)
7 sensors 3 USDA thermistor inputs
(dCF02=64) 1 humidity input
1 cargo probe (thermistor input)
b. Generic Mode
The generic recording mode allows user selection of the
network data points to be recorded. The user may select
up to a total of eight data points for recording. A list of the
data points available for recording follows. Changing the
configuration to generic and selecting which data points
to record may be done using the Carrier Transicold Data
Retrieval Program.
1. Control mode
2. Control temperature
3. Frequency
4. Humidity
T-317
DEFAULT
---2
60
Short
A
A
A
A
A
A
2 thermistor inputs(supply & return)
10 sensors 3 USDA thermistor inputs
(dCF02=94) 1 humidity input
1 cargo probe (thermistor input)
3 C.A. inputs (NOT APPLICABLE)
3-8
Raw Data Report for ABC1234567
May 31, 2001 to Jun 04, 2001
System Configuration at the Time of Interrogation:
Interrogated On Sept 05, 2001
Extracted by DataLine Rev 1.0.0
Controller Software: 5120
Controller Serial #: 04163552
Bill of Lading #: 1
Origin:
Origin Date:
Destination:
Discharge Date:
Comment: DataLine Tool
Probe Calibration Readings: USDA1: 0.0 USDA2: 0.0 USDA3: 0.0 Cargo: 0.0
Temperature Units: Centigrade
________________________________________________________________________________________
May 31, 2001
Setpoint: 1.66, Container :
Serial : 04189552
9 Sensors Logged at 15 Minute Interval
Sensor
Format
Resolution
Figure 3- 5 Standard Configuration Report
3-9
T-317
3.6.4 Logging Interval (dCF03)
not present, the DataCORDER will power up when the
real time clock indicates that a data recording should
take place. When the DataCORDER is finished
recording, it will power down.
The user may configure four time intervals between
data recordings. Data is logged at exact intervals in
accordance with the real time clock. The clock is factory
set at Greenwich Mean Time.
During DataCORDER power-up, while using
battery-pack power, the controller will perform a
hardware voltage check on the battery. If the hardware
check passes, the Controller will energize and perform a
software battery voltage check before DataCORDER
logging. If either test fails, the real time clock battery
power-up will be disabled until the next AC power cycle.
Further DataCORDER temperature logging will be
prohibited until that time.
3.6.5 Thermistor Format (dCF04)
The user may configure the format in which the
thermistor readings are recorded. The low resolution is
a 1 byte format and the normal resolution is a 2 byte
format. The low requires less memory and records
temperature in 0.25°C (0.45°F) steps when in the
perishable mode or 0.5°C (0.9°F) steps when in the
frozen mode. The normal records temperature in
0.01°C (0.02°F) steps for the entire range.
An alarm will be generated when the battery voltage
transitions from good to bad indicating that the battery
pack needs recharging. If the alarm condition persists
for more than 24 hours on continuous AC power, the
battery pack needs replacement.
3.6.6 Sampling Type (dCF05 & dCF06)
Three types of data sampling are available, average,
snapshot and USDA. When configured to average, the
average of readings taken every minute over the
recording period is recorded. When configured to
snapshot, the sensor reading at the log intervale time is
recorded. When USDA is configured the supply and
return temperature readings are averaged and the 3
USDA probe readings are snapshot.
3.6.9 Pre-Trip Data Recording
The DataCORDER will record the initiation of a pre-trip
test (refer to paragraph 3.5) and the results of each of
the tests included in pre--trip. The data is time-stamped
and may be extracted via the Data Retrieval program.
Refer to Table 3-9 for a description of the data stored in
the DataCORDER for each corresponding Pre-Trip test.
3.6.7 Alarm Configuration (dCF07 -- dCF10)
The USDA and cargo probe alarms may be configured
to OFF, ON or AUTO.
3.6.10 DataCORDER Communications
If a probe alarm is configured to OFF, then the alarm for
this probe is always disabled.
Data retrieval from the DataCORDER can be
accomplished by using one of the following;
DataReader, DataLine/DataView or a communications
interface module.
If a probe alarm is configured to ON, then the associated
alarm is always enabled.
If the probes are configured to AUTO, they act as a
group. This function is designed to assist users who
keep their DataCORDER configured for USDA
recording, but do not install the probes for every trip. If all
the probes are disconnected, no alarms are activated.
As soon as one of the probes is installed , then all of the
alarms are enabled and the remaining probes that are
not installed will give active alarm indications.
The DataCORDER will record the initiation of a pre-trip
test (refer to paragraph 3.5) and the results of each of
the tests included in pre--trip. The data is time-stamped
and may be extracted via the Data Retrieval program.
Refer to Table 3-9, page 3-26 for a description of the
data stored in the DataCORDER for each
corresponding Pre-Trip test.
3.6.8
a. DataReader
The Carrier Transicold Data Reader (see Figure 3- 6) is
a simple to operate hand held device designed to extract
data from the DataCORDER and then upload it to a
personal computer. The Data Reader has the ability to
store multiple data files. Refer to Data Retrieval manual
62-10629 for a more detailed explanation of the
DataReader.
DataCORDER Power-Up
DataReader
The DataCORDER may be powered up in any one of
four ways:
1. Normal AC power: The DataCORDER is powered
up when the unit is turned on via the stop-start switch.
2. Controller DC battery pack power: If a battery pack
is installed, the DataCORDER will power up for
communication when an interrogation cable is plugged
into an interrogation receptacle.
3. External DC battery pack power: A 12 volt battery
pack may also be plugged into the back of the
interrogation cable, which is then plugged into an
interrogation port. No controller battery pack is required
with this method.
4. Real Time Clock demand: If the DataCORDER is
equipped with a charged battery pack and AC power is
T-317
Figure 3- 6 Data Reader
3-10
6. Upon completion, the display will show ”dnLd done”,
and the unit should be shut off down before the card is
removed. If battery power was used, the controller
will go to back to sleep a few seconds after completing the download, then remove card.
b. DataLine
The DataLINE software for a personal computer is
supplied on both floppy disks and CD. This software
allows interrogation, configuration variable assignment,
screen view of the data, hard copy report generation,
cold treatment probe calibration and file management.
Refer to Data Retrieval manual 62-10629 for a more
detailed explanation of the DataLINE interrogation
software. The DataLine manual may be found on the net
at www.contaner.carrier.com
Files downloaded to the DataBANK card will be in
Carrier ’dcx’ format. File name will be of the form:
XXXXNNNNNNN_YYMMDDHHMM.dcx,
where
XXXXNNNNNNNN is the container number and
YYMMDDHHMM is the year, month, day, hour, and
minute of the last event record or sensor data record
contained in the transfer.
c. DataBank
The DataBank, card interfaces with the controller
through the programming slot and can download the
data at much faster pace when compared to a PC or
DataReader. If the DataBANK card contains a dcx file
from the same controller that is less than twenty four
hours old, the older file will be replaced by the more
current data once the transfer is initiated.
Note
If the unit does not have a valid container number DataBank will subsitute the container number with “CTDExxxxxxx” where the last seven
digits will correspond to the last seven digits in
the controller part number.
The MicroLink 3 controller can take up to 30
seconds to complete the power up sequence
after removal of the DataBank card. During this
period the status LED on the MicroLink 3 controller will blink, but the display will not power up.
During this period the ”boot loader” software is
being updated.
Data transfers are completed fully or not at all. If not
enough space is available to complete the transfer then
the transfer will not be initiated and “CArd _FuLL” will be
displayed.
write protect switch
If a download/transfer cannot be completed the
application will attempt to erase any partial transfer and
”bAd CaRd” will be displayed.
Figure 3- 7 DataBank Card
d. Communications Interface Module
Note
The DataBank file format is: READ05xx.ML3
where ”xx” is the version number. This file
should be the only file other than saved downloads (dcx files) inside the card memory. Any
other files may result in card corruption.
The communications interface module is a slave
module which allows communication with a master
central monitoring station. The module will respond to
communication and return information over the main
power line.
With a remote monitoring unit installed, all functions and
selectable features that are accessible at the unit may
be performed at the master station. Retrieval of all
DataCORDER reports may also be performed. Refer to
the master system technical manual for further
information.
1.The unit trip data can be downloaded with the DataBank card if the battery pack has sufficient charge or
the unit can be plugged into power.
2. Turn off unit.
3.6.11 USDA Cold Treatment
3. Insert DataBank card in the controller programming
slot.
Sustained cold temperature has been employed as an
effective postharvest method for the control of
Mediterranean and certain other tropical fruit flies.
Exposing infested fruit to temperatures of 2.2 degrees
Celsius (36_F) or below for specific periods results in
the mortality of the various stages of this group of
insects.
4. Turn on unit, (battery power can be used if unit is not
plugged in). The display module will show the available card memory space and the user can make the
choice of downloading by trip, last 30, 60 or 90 days,
or ALL Data download via the arrow keys on the keypad.
In response to the demand to replace fumigation with
this environmentally sound process, Carrier has
integrated Cold Treatment capability into its
microprocessor system. These units have the ability to
maintain supply air temperature within one-quarter
degree Celsius of setpoint and record minute changes
in product temperature within the DataCORDER
memory, thus meeting USDA criteria. Information on
USDA is provided in the following subparagraphs
Note
If the card is write protected then “CHECK
CARd” will be displayed (inspect card for the
correct switch position).See Figure 3- 7.
5. Press the enter key at the chosen selection to execute download.
3-11
T-317
e. To initiate USDA Recording, connect the personal
computer and perform the configuration as follows:
a. USDA Recording
A special type of recording is used for USDA cold
treatment purposes. Cold treatment recording requires
three remote temperature probes be placed at
prescribed locations in the cargo. Provision is made to
connect these probes to the DataCORDER via
receptacles located at the rear left-hand side of the unit.
Four or five receptacles are provided. The four three-pin
receptacles are for the probes and fifth, five pin,
receptacle is the rear connection for the the Interrogator.
The probe receptacles are sized to accept plugs with
tricam coupling locking devices. A label on the back
panel of the unit shows which receptacle is used for
each probe.
The standard DataCORDER report displays the supply
and return air temperatures. The cold treatment report
displays USDA #1, #2, #3 and the supply and return air
temperatures. Cold treatment recording is backed up by
a battery so recording can continue if AC power is lost.
b. USDA/ Message Trip Comment
A special feature is incorporated which allows the user
to enter a USDA (or other) message at the head of a
data report. The maximum message length is 78
characters. Only one message will be recorded per day.
3.6.12 USDA Cold Treatment Procedure
The following is a summary of the steps required to
initiate a USDA Cold Treatment.
a. Calibrate the three USDA probes by ice bathing the
probes and performing the calibration function with
the DataReader or a personal computer. This calibration procedure determines the probe offsets and
stores them in the controller for use in generating the
cold treatment report. Refer to the Data Retrieval
manual 62-10629 for more details.
b. Pre-cool the container to the treatment temperature
or below.
c..
Install the DataCORDER module battery
pack (if not already installed).
d. Place the three probes. The probes are placed into
the pulp of the fruit (at the locations defined in the following table) as the product is loaded.
Sensor 1
Sensor 2
Sensor 3
T-317
1. Fill in ISO header information
2. Add a trip comment if desired
3. Configure for five probes (s, r, P1, P2, P3)
4. Configure for one hour logging interval
5. Set the sensor configuration at USDA
6. Configure for two byte memory storage format
7. Do a trip start
3.6.13 DataCORDER Alarms
Alarm display is an independent DataCORDER
function. If an operating parameter is outside of the
expected range or a component does not return the
correct signals back to the DataCORDER an alarm is
generated. The DataCORDER contains a buffer of up to
eight alarms. A listing of the DataCORDER alarms is
provided in Table 3-10, page 3-27. Refer to paragraph
3.6.7 for configuration information.
To display alarm codes:
a. While in the Default Display mode, press the ALT.
MODE & ALARM LIST keys. This accesses the DataCORDER Alarm List Display Mode, which displays
any alarms stored in the Alarm Queue.
b. To scroll to the end of the alarm list press the UP ARROW. Depressing the DOWN ARROW key will scroll
the list backward.
c. The left display will show “AL#” where # is the alarms
number in the queue. The right display will show
“AA##,” if the alarm is active, where ## is the alarm
number. “IA##,” will show if the alarm is inactive
d. “END” is displayed to indicate the end of the alarm list
if any alarms are active. “CLEAr” is displayed if all the
alarms in the list are inactive.
e. If no alarms are active, the Alarm Queue may be
cleared. The exception to this rule is the DataCORDER Alarm Queue Full alarm (AL91) , which does not
have to be inactive in order to clear the alarm list. To
Clear the Alarm List:
Place in pulp of the product located next
to the return air intake.
Place in pulp of the product five feet
from the end of the load for 40 foot containers, or three feet from the end of the
load for 20 foot containers. This probe
should be placed in a center carton at
one-half the height of the load.
Place in pulp of product five feet from
the end of the load for 40 foot containers
or three feet from the end of the load for
20 foot containers. This probe should be
placed in a carton at a side wall at onehalf the height of the load.
1. Press the ALT. MODE & ALARM LIST keys.
2. Press the UP/DOWN ARROW key until “CLEAr” is
displayed.
3. Press the ENTER key. The alarm list will clear and
“-- -- -- -- -- ” will be displayed.
4. Press the ALARM LIST key. “AL” will show on the left
display and “-- -- -- -- -- ” on the right display when
there are no alarms in the list.
5. Upon clearing of the Alarm Queue, the Alarm light will
be turned off.
3-12
Table 3-4 Controller Configuration Variables
CONFIGURATION
TITLE
DEFAULT
OPTION
NUMBER
CnF01
Bypass Valve Enable
In
Out
CnF02
Evaporator Fan Speed
dS (Dual)
SS (Single)
CnF03
Control Sensors
FOUr
duAL
CnF04
Dehumidification Mode
On
OFF
CnF05
Reserved for future use
---------n/a
CnF06
Condenser Fan Speed Select
OFF (Single)
On (Variable)
CnF07
Unit Selection, 20FT/ 40FT/45FT
40ft
20ft,45
CnF08
Single Phase/Three Phase Motor
1Ph
3Ph
CnF09
Refrigerant Selection
r134a
r12, r22, bLEnd
CnF10
Two Speed Compressor Logic
Out (Single)
In (Dual)
CnF11
Defrost “Off” Selection
noOFF
OFF
CnF12
TXV/Solenoid Quench Valve
Out (TXV)
In (Solenoid)
CnF13
Unloader
Out
In
CnF14
Condenser Pressure Control (CPC)
In
Out
CnF15
Discharge Temperature Sensor
Out
In
CnF16
DataCORDER Present
On (Yes)
OFF (No)
CnF17
Discharge Pressure Sensor
Out (No)
In (Yes)
CnF18
Heater
Old (Low Watt)
nEW (High Watt)
CnF19
Controlled Atmosphere
Out (No)
In (Yes)
CnF20
Suction Pressure Sensor
Out (No)
In (Yes)
CnF21
Autotransformer
Out
In
CnF22
Economy Mode Option
OFF
Std, Full
CnF23
Defrost Interval Timer Save Option
noSAv
SAv
CnF24
Advanced Pre-Trip Enhanced Test Series Option
Auto
Auto2, Auto 3
CnF25
Pre-Trip Test Points/Results Recording Option
rSLtS
dAtA
CnF26
Heat Lockout Change Option
Set to --10_C
Set to --5_C
CnF27
Suction Temperature Display Option
Out
In
CnF28
Bulb Mode Option
NOr
bULb
CnF29
Arctic Mode
Out
In
CnF30
Compressor Size
41 CFM
37 CFM
CnF31
Probe Check Option
Std
SPEC
CnF32
Single Evaporator Fan Option
2EF0
1EF0
CnF33
Snap Freeze Option
OFF
SnAP
CnF34
Degree Celsius Lockout Option
bOth
_F
CnF35
Humidification Mode
OFF
On
CnF36
SMV Type
1 (standard)
2, 3 (stepper)
CnF37
Electronic Temperature Recorder
rEtUR
SUPPL, bOth
CnF38
Quench Bypass Valve
Out
In
CnF39
Expanded Current Limit Range
Out
In
CnF40
Demand Defrost
Out
In
CnF41
Lower DTT Setting
Out
In
CnF42
Auto Pre--trip Start
Out
In
CnF47
Fresh Air Vent Position Sensor
OFF
UPP, LOW
Note: Configuration numbers not listed are not used in this application. These items may appear when loading
configuration software to the controller but changes will not be recognized by the controller programming.
3-13
T-317
Table 3-5 Controller Function Codes (Sheet 1 of 4)
Code
No.
TITLE
DESCRIPTION
Note: If the function is not applicable, the display will read “-- -- -- -- -- ”
Display Only Functions
Cd07 Main Power Voltage
Main Power FreCd08 quency
Displays the SMV percent open. The right display reads 100% when the valve is
fully open and 0% when the valve is fully closed. The valve will usually be at 21%
on start up of the unit except in very high ambient temperatures.
Displays state of the solenoid quench valve, open or closed.
Not used
The current sensor measures current on two legs. The third unmeasured leg is
calculated based on a current algorithm. The current measured is used for control
and diagnostic purposes. For control processing, the highest of the Phase A and
B current values is used for current limiting purposes. For diagnostic processing,
the current draws are used to monitor component energization.. Whenever a
heater or a motor is turned ON or OFF, the current draw increase/reduction for
that activity is measured. The current draw is then tested to determine if it falls
within the expected range of values for the component. Failure of this test will result in a pre-trip failure or a control alarm indication.
The main supply voltage is displayed.
The value of the main power frequency is displayed in Hertz. The frequency displayed will be halved if either fuse F1 or F2 is bad (alarm code AL21).
Ambient TemperaCd09 ture
The ambient sensor reading is displayed.
Suction Modulation
Cd01 Valve Opening (%)
Cd02 Quench Valve
Cd03 Not Applicable
Cd04 Line Current,
Phase A
Cd05 Line Current,
Phase B
Cd06 Line Current,
Phase C
Compressor Suction
Cd10 Temperature
Compressor suction temperature sensor reading is displayed.
Compressor DisCd11 charge Temperature
Compressor discharge temperature sensor reading is displayed.
Compressor Suction
Cd12 Pressure
Compressor suction pressure transducer reading is displayed.
Cd13 Condenser Pressure Condenser pressure transducer reading is displayed.
Compressor DisCd14 charge Pressure
Compressor discharge pressure transducer reading is displayed.
Unloader Valve (On-Cd15 Off)
Not used in this application
Compressor Motor
Cd16 Hour Meter
Records total hours of compressor run time. Total hours are recorded in increments of 10 hours (i.e., 3000 hours is displayed as 300).
Relative Humidity
Cd17 (%)
Humidity sensor reading is displayed. This code displays the relative humidity, as
a percent value.
Cd18 Software Revision #
The software revision number is displayed.
This code checks the Controller/DataCORDER battery pack. While the test is running, “btest” will flash on the right display, followed by the result. “PASS” will be
displayed for battery voltages greater than 7.0 volts. “FAIL” will be displayed for
battery voltages between 4.5 and 7.0 volts, and “-- -- -- -- -- ” will be displayed for
battery voltages less than 4.5 volts. After the result is displayed for four seconds,
“btest” will again be displayed, and the user may continue to scroll through the
various codes.
Cd19 Battery Check
Cd20 Config/Model #
This code indicates the dash number of the model for which the Controller is configured (i.e., if the unit is a 69NT40-541-100, the display will show “41100”).
Humidity Water
Cd21 Pump/Atomizer
Status
This code displays the status of the humidity water pump (-- -- -- -- -- , forward, reverse or off). If not configured, the mode is permanently deactivated and will display “-- -- -- -- -- .”
T-317
3-14
Table 3-5 Controller Function Codes (Sheet 2 of 4)
Cd22 Compressor Speed
Cd23 Evaporator Fan
Controlled
Cd24 Atmosphere State
The status of the compressor is displayed (high, low or off).
Displays the current evaporator fan state (high, low or off).
Compressor Run
Cd25 Time Remaining Until Defrost
Defrost Temperature
Cd26 Sensor Reading
This code displays the time remaining until the unit goes into defrost (in tenths of
an hour). This value is based on the actual accumulated compressor running
time.
Not used in this application
Defrost temperature sensor reading is displayed.
Configurable Functions
NOTE
Function codes Cd27 through Cd37 are user-selectable functions. The operator can change the value of
these functions to meet the operational needs of the container.
There are two modes for defrost initiation, either user--selected timed intervals or
automatic control. The user--selected values are (OFF), 3, 6, 9, 12, or 24 hours
while the factory default is 12 hours. Automatic defrost starts with an initial defrost at 3 hours and then adjusts the interval to the next defrost based on the accumulation of ice on the evaporator coil. Following a start--up or after termination
of a defrost, the time will not begin counting down until the defrost temperature
sensor (DTS) reading falls below set point. If the reading of DTS rises above set
point any time during the timer count down, the interval is reset and the countdown begins over. If DTS fails, alarm code AL60 is activated and control switches
Defrost Interval
Cd27 (Hours or Automatic) over to the the return temperature sensor. The controller will act in the same manner as with the DTS except the return temperature sensor reading will be used.
Defrost Interval Timer Value (Configuration variable CnF23): If the software is
configured to “SAv” (save) for this option, then the value of the defrost interval
timer will be saved at power down and restored at power up. This option prevents
short power interruptions from resetting an almost expired defrost interval, and
possibly delaying a needed defrost cycle.
Temperature Units
Cd28 (_C or _F)
NOTE
The defrost interval timer counts only during compressor run time.
This code determines the temperature units (_C or _F) which will be used for all
temperature displays. The user selects _C or _F by selecting function code Cd28
and pushing the ENTER key. The factory default value is Celsius units.
NOTE
This function code will display “--- --- --- --- ---“ if Configuration Variable CnF34 is
set to _F.
Failure Action
Cd29 (Mode)
If all of the control sensors are out of range (alarm code AL26) or there is a probe
circuit calibration failure (alarm code AL27), the unit will enter the shutdown state
defined by this setting. The user selects one of four possible actions as follows:
A -- Full Cooling (stepper motor SMV at maximum allowed opening)
B -- Partial Cooling (stepper motor SMV 11% open)
C -- Evaporator Fan Only
D -- Full System Shutdown -- Factory Default
Cd30 In-Range Tolerance
The in-range tolerance will determine the band of temperatures around the set
point which will be designated as in-range. If the control temperature is in-range,
the in-range light will be illuminated. There are four possible values:
1 = ¦ 0.5_C (¦ 0.9_F)
2 = ¦ 1.0_C (¦ 1.8_F)
3 = ¦ 1.5_C (¦ 2.7_F)
4 = ¦ 2.0_C (¦ 3.6_F) -- Factory Default
3-15
T-317
Table 3-5 Controller Function Codes (Sheet 3 of 4)
Stagger Start Offset
Cd31 Time (Seconds)
The stagger start offset time is the amount of time that the unit will delay at startup, thus allowing multiple units to stagger their control initiation when all units are
powered up together. The eight possible offset values are:
0 (Factory Default), 3, 6, 9, 12, 15, 18 or 21 seconds
The current limit is the maximum current draw allowed on any phase at any time.
Limiting the unit’s current reduces the load on the main power supply. This is acCurrent Limit
complished by reducing the SMV position until current draw is reduced to the set
Cd32 (Amperes)
point. When desirable, the limit can be lowered. Note, however, that capacity is
also reduced. The five values for 460vac operation are:
15, 17, 19, 21 (Factory Default), 23
Relative humidity set point is available only on units configured for dehumidification. When the mode is activated, the control probe LED flashes on and off every
second to alert the user. If not configured, the mode is permanently deactivated
and “-- -- -- -- -- ” will display. The value can be set to “OFF.” “TEST,” or a range of
65 to 95% relative humidity in increments of 1%. [If bulb mode is active (code
Cd35) and “Lo” speed evaporator motors are selected (code Cd36) then set point
Perishable Mode
ranges from 60 to 95%.] When “TEST” is selected or test set point is entered, the
Dehumidification/Hu- heat LED should illuminate, indicating that dehumidification mode is activated.
Cd33 midification Control
After a period of five minutes in the “TEST” mode has elapsed, the previously
(% RH)
selected mode is reinstated.
Economy Mode
Cd34 (On--Off)
Cd35 Bulb Mode
Evaporator Speed
Cd36 Select
Defrost Termination
Cd37 Temperature Setting
(Bulb Mode)
T-317
NOTE
If humidification (CnF35) is enabled, then humidification will be enabled and
dehumidification locked out at set points of 75% and above. At set points below 75%, dehumidification will be enabled and dehumidification locked out.
Economy mode is a user selectable mode of operation provided for power saving
purposes.
Bulb mode is a user selectable mode of operation that is an extension of dehumidification control (Cd33). If dehumidification is set to “Off,” code Cd35 will display “Nor” and the user will be unable to change it. After a dehumidification set
point has been selected and entered for code Cd33, the user may then change
code Cd35 to “bulb.” After bulb has been selected and entered, the user may then
utilize function codes Cd36 and Cd37 to make the desired changes.
This code is enabled only if in the dehumidification mode (code Cd33) and bulb
mode (Cd35) has been set to “bulb”. If these conditions are not met, “alt” will be
displayed (indicating that the evaporator fans will alternate their speed) and the
display cannot be changed. If a dehumidification set point has been selected
along with bulb mode then “alt” may be selected for alternating speed, “Lo” for low
speed evaporator fan only, or “Hi” for high speed evaporator fan only. If a setting
other than “alt” has been selected and bulb mode is deactivated in any manner,
then selection reverts back to “alt.”
This code, as with function code Cd36, is used in conjunction with bulb mode and
dehumidification. If bulb mode is active, this code allows the user to change the
defrost termination thermostat settings. If bulb mode is deactivated, the DTS setting returns to the default.
3-16
Table 3-5 Controller Function Codes (Sheet 4 of 4)
Secondary Supply
Cd38 Temperature Sensor
Code Cd38 will display the current secondary supply temperature sensor reading
for units configured for four probes. If the unit is configured with a DataCORDER,
Cd38 will display “-- -- -- -- -- .” If the DataCORDER suffers a failure, (AL55) Cd38
will display the supply recorder sensor reading.
Secondary Return
Cd39 Temperature Sensor
Code Cd39 will display the current secondary return temperature sensor reading
for units configured for four probes. If the unit is configured with a DataCORDER,
Cd39 will display “-- -- -- -- -- .” If the DataCORDER suffers a failure, (AL55) Cd39
will display the return recorder sensor reading.
Container IdentificaCd40 tion Number
Cd41 Not Applicable
Cd42 Not Applicable
AutoFresh Mode
Cd43 (Future use)
AutoFresh Values
Cd44 (Future use)
Code Cd40 is configured at commissioning to read a valid container identification
number. The reading will not display alpha characters, only the numeric portion of
the number will display.
-----
Code Cd45 will display whenever the control detects movement via the sensor
unless alarm 50 is active. The code shall be displayed for 30 seconds, then time
out and return to the normal display mode. If the Temperature unit is _F, the VPS
Vent Position Sensor units shall be CFM and in _C the VPS units shall be CMH.
Cd45 (VPS)
Setpoint and Temperature can be displayed in either _C or _F units, depending on
the units selected. Holding the _C / _F key will switch to the other unit as long as
the key is held. Pressing and holding the RETURN / SUPPLY key will cause the
control temperature display to switch to the opposite probe temperature as long
as the key is held.
Cd46 Not Applicable
-Variable Economy
The variable temperature “_C or _F” setting is used with optional economy mode.
Cd47 Temperature Setting Function code is “--------“ when unit is not configured for economy mode.
3-17
T-317
Table 3-6 Controller Alarm Indications (Sheet 1 of 3)
Code
No.
TITLE
DESCRIPTION
Evaporator Motor 1
AL11 IP Trip
Alarm 11 is applicable to units with Single Evaporator Fan Capability (CnF32 set
to 1EFO) only. The alarm is triggered if the evaporator fan motor #1 internal protector opens. If the alarm is active, probe check is deactivated.
Evaporator Motor 2
AL12 IP Trip
Alarm 12 is applicable to units with Single Evaporator Fan Capability (CnF32 set
to 1EFO) only. The alarm is triggered if the evaporator fan motor #2 internal protector opens. If the alarm is active, probe check is deactivated.
Control Circuit Fuse
AL20 Open (24 vac)
Alarm 20 is triggered by control power fuse (F3A, F3B) opening and will cause
the software shutdown of all control units. This alarm will remain active until the
fuse is replaced.
Micro Circuit Fuse
AL21 Open (18 vac)
Alarm 21 is triggered by one of the fuses (F1/F2) being opened on 18 volts AC
power supply to the Controller. The suction modulation valve (SMV) will be
opened and current limiting is halted. Temperature control will be maintained by
cycling the compressor.
Evaporator Fan MoAL22 tor Safety
Alarm 22 responds to the evaporator motor internal protectors. On units with Normal Evaporator Fan Operation (CnF32 set to 2EFO) the alarm is triggered by
opening of either internal protector. It will disable all control units until the motor
protector resets. On units with Single Evaporator Fan Capability (CnF32 set to
1EFO) the alarm is triggered by opening of both internal protectors. It will disable
all control units until a motor protector resets.
Compressor Motor
AL24 Safety
Alarm 24 is triggered by the opening of the compressor motor internal protector.
This alarm will disable all control units except for the evaporator fans and will remain active until the motor protector resets. This alarm triggers the failure action
code set by Function Code Cd29.
Condenser Fan MoAL25 tor Safety
Alarm 25 is triggered by the opening of the condenser motor internal protector
and will disable all control units except for the evaporator fans. This alarm will
remain active until the motor protector resets. This alarm is deactivated if the unit
is operating on water cooled condensing.
All Supply and Return temperature
AL26 Control Sensors
Failure
Alarm 26 is triggered if the Controller determines that all of the control sensors
are out-of-range. This can occur for box temperatures outside the range of
--50_C to +70_C (--58_F to +158_F). This alarm triggers the failure action code
set by Function Code Cd29.
Probe Circuit CalAL27 ibration Failure
The Controller has a built-in Analog to Digital (A-D) converter, used to convert
analog readings (i.e. temperature sensors, current sensors, etc.) to digital readings. The Controller continuously performs calibration tests on the A-D converter.
If the A-D converter fails to calibrate for 30 consecutive seconds, this alarm is
activated.This alarm will be inactivated as soon as the A-D converter calibrates.
Fresh Air Position
AL50 Sensor (VPS)
Alarm 50 is activated whenever the sensor is outside the valid range. There is a
5 minute adjustment period where the user can change the vent position without
generating an alarm event. The sensor requires 5 minutes of no movement to
confirm stability. If the vent position changes at any point beyond the 5 minute
adjustment period, the sensor will generate an alarm event. The alarm is triggered off when the unit power cycles and the sensor is within valid range.
AL51 Alarm List Failure
During start-up diagnostics, the EEPROM is examined to determine validity of its
contents. This is done by testing the set point and the alarm list. If the contents
are invalid, Alarm 51 is activated. During control processing, any operation involving alarm list activity that results in an error will cause Alarm 51 to be activated. Alarm 51 is a “display only” alarm and is not written into the alarm list.
Pressing the ENTER key when “CLEAr” is displayed will result in an attempt to
clear the alarm list. If that action is successful (all alarms are inactive), Alarm 51
will be reset.
AL52 Alarm List Full
Alarm 52 is activated whenever the alarm list is determined to be full; at start-up
or after recording an alarm in the list. Alarm 52 is displayed, but is not recorded in
the alarm list. This alarm can be reset by clearing the alarm list. This can be done
only if all alarms written in the list are inactive.
AL53 Battery Pack Failure
Alarm 53 is caused by the battery pack charge being too low to provide sufficient
power for battery-backed recording. Renew replaceable batteries. If this alarm
occurs on start up, allow a unit fitted with rechargeable batteries to operate for up
to 24 hours to charge rechargeable batteries sufficiently to deactivate the alarm
T-317
3-18
Table 3-6 Controller Alarm Indications (Sheet 2 of 3)
Alarm 54 is activated by an invalid primary supply temperature sensor reading
that is sensed outside the range of --50 to +70_C (--58_F to +158_F) or if the
probe check logic has determined there is a fault with this sensor. If Alarm 54 is
activated and the primary supply is the control sensor, the secondary supply senPrimary Supply Tem- sor will be used for control if the unit is so equipped. If the unit does not have a
AL54 perature Sensor
secondary supply temperature sensor, and AL54 is activated, the primary return
Failure (STS)
sensor reading, minus 2_C will be used for control.
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm
Alarm 56 is activated by an invalid primary return temperature sensor reading
that is outside the range of --50 to +70_C (--58_F to +158_F). If Alarm 56 is activated and the primary return is the control sensor, the secondary return sensor
Primary Return Tem- will be used for control if the unit is so equipped. If the unit is not equipped with a
secondary return temperature sensor or it fails, the primary supply sensor will be
AL56 perature Sensor
used for control.
Failure (RTS)
Ambient TemperaAL57 ture Sensor Failure
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm.
Alarm 57 is triggered by an ambient temperature reading outside the valid range
from --50_C (--58_F) to +70_C (+158_F).
Alarm 58 is triggered when the compressor high discharge pressure safety switch
remains open for at least one minute. This alarm will remain active until the pressure switch resets, at which time the compressor will restart.
Alarm 59 is triggered by the opening of the heat termination thermostat and will
Heat Termination
result in the disabling of the heater. This alarm will remain active until the thermoAL59 Thermostat
stat resets.
Alarm 60 is an indication of a probable failure of the defrost temperature sensor
(DTS). It is triggered by the opening of the heat termination thermostat (HTT) or
the failure of the DTS to go above set point within two hours of defrost initiation.
Defrost Temperature After one-half hour with a frozen range set point, or one-half hour of continuous
AL60 Sensor Failure
compressor run time, if the return air falls below 7_C (45_F), the Controller
checks to ensure the DTS reading has dropped to 10_C or below. If not, a DTS
failure alarm is given and the defrost mode is operated using the return temperature sensor. The defrost mode will be terminated after one hour by the Controller.
Alarm 61 is triggered by detection of improper amperage resulting from heater
activation or deactivation. Each phase of the power source is checked for proper
AL61 Heaters Failure
amperage.This alarm is a display alarm with no resulting failure action, and will
be reset by a proper amp draw of the heater.
Compressor High
AL58 Pressure Safety
Compressor Circuit
AL62 Failure
AL63 Current Over Limit
Discharge TemperaAL64 ture Over Limit
Discharge Pressure
AL65 Transducer Failure
Alarm 62 is triggered by improper current draw increase (or decrease) resulting
from compressor turn on (or off). The compressor is expected to draw a minimum of 2 amps; failure to do so will activate the alarm.This is a display alarm
with no associated failure action and will be reset by a proper amp draw of the
compressor.
Alarm 63 is triggered by the current limiting system. If the compressor is ON and
current limiting procedures cannot maintain a current level below the user selected limit, the current limit alarm is activated.This alarm is a display alarm and
is inactivated by power cycling the unit, changing the current limit via the code
select Cd32, or if the suction modulation valve (SMV) is open beyond the controller desired point.
Alarm 64 is triggered if the discharge temperature sensed is greater than 135_C
(275_F) for three continuous minutes, if it exceeds 149_C (300_F), or if the sensor is out of range. This is a display alarm and has no associated failure action.
Alarm 65 is triggered by a compressor discharge transducer reading outside the
valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm2 (460 psig). This is a display alarm and has no associated failure action.
3-19
T-317
Table 3-6 Controller Alarm Indications (Sheet 3 of 3)
Alarm 66 is triggered by a suction pressure transducer reading outside the valid
range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm2 (460 psig). This is a display
alarm and has no associated failure action.
Alarm 67 is triggered by a humidity sensor reading outside the valid range of 0%
Humidity Sensor
to 100% relative humidity. If alarm AL67 is triggered when the dehumidification
AL67 Failure
mode is activated, then the dehumidification mode will be deactivated.
reading outside the
Condenser Pressure Alarm 68 is triggered by a condenser pressure transducer
valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm2 (460 psig). This is a disAL68 Transducer Failure
play alarm and has no associated failure action.
Suction Temperature Alarm 69 is triggered by a suction temperature sensor reading outside the valid
range of --60_C (--76_F) to 150_C (302_F). This is a display alarm and has no
AL69 Sensor Failure
associated failure action.
NOTE
If the Controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70 and
AL71 will be processed as Controller alarms AL70 and AL71.
The Controller performs self-check routines. if an internal failure occurs, an
“ERR” alarm will appear on the display. This is an indication the Controller needs
to be replaced.
ERR Internal
Microprocessor
ERROR
DESCRIPTION
#
Failure
Indicates that the Controller working memory has
ERR 0 -- RAM failure
failed.
Suction Pressure
AL66 Transducer Failure
EER 1 -- Program Memory
failure
EER 2 -- Watchdog
time--out
EER 3 -- N/A
EER 4 -- N/A
ERR
#
Internal
Microprocessor
Failure
Entr
StPt
Enter Setpoint
(Press Arrow &
Enter)
Low Main Voltage
(Function Codes
Cd27--38 disabled
and NO alarm
stored.)
LO
T-317
Indicates a problem with the Controller program.
The Controller program has entered a mode whereby the Controller program has stopped executing.
N/A
N/A
The Controller’s Analog to Digital (A-D) converter
EER 5 -- A-D failure
has failed.
EER 6 -- IO Board failure
Internal program/update failure.
EER 7 -- Controller failure Internal version/firmware incompatable.
EER 8--DataCorder failure Internal DataCorder memory failure.
EER 9 -- Controller failure Internal controller memory failure.
In the event that a failure occurs and the display cannot be updated, the status
LED will indicate the appropriate EER code using Morse code as shown below.
E R R 0 to 9
ERR0 = . .--. .--. ---------ERR1 = . .--. .--. . -------ERR2 = . .--. .--. . . -----ERR3 = . .--. .--. . . . ---ERR4 = . .--. .--. . . . . -ERR5 = . .--. .--. -- . . . .
ERR6 = . .--. .--. ---- . . .
ERR7 = . .--. .--. ------ . .
ERR8 = . .--. .--. -------- .
ERR9 = . .--. .--. -------- .
The Controller is prompting the operator to enter a set point.
This message will be alternately displayed with the set point whenever the supply
voltage is less than 75% of its proper value.
3-20
Table 3-7 Controller Pre-Trip Test Codes (Sheet 1 of 4)
Code
No.
TITLE
DESCRIPTION
NOTE
“Auto” or “Auto1” menu includes the: P, P1, P2, P3, P4, P5, P6 and rSLts. “Auto2” menu includes P, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 and rSLts.“Auto3 menu includes P, P1, P2,
P3, P4, P5, P6, P7, P8 and rSLts
P
Pre-Trip Initiated
All lights and display segments will be energized for five seconds at the start of
the pre-trip. Since the unit cannot recognize lights and display failures, there are
no test codes or results associated with this phase of pre-trip.
P1-0
Heaters Turned On
Setup: Heater must start in the OFF condition, and then be turned on. A current
draw test is done after 15 seconds.
Pass/Fail Criteria: Passes if current draw change is within the range specified.
P1-1
Heaters Turned Off
Setup: Heater must start in the ON condition, and then be turned off. A current
draw test is done after 10 seconds.
Pass/Fail Criteria: Passes if current draw change is within the range specified.
P2-0
Condenser Fan On
Requirements: Water pressure switch (WP) input must be closed.
Setup: Condenser fan is turned ON, a current draw test is done after 15 seconds.
Pass/Fail Criteria: Passes if current draw change is within the range specified.
P2-1
Condenser Fan Off
Setup: Condenser fan is turned OFF, a current draw test is done after 10 seconds.
Pass/Fail Criteria: Passes if current draw change is within the range specified.
Requirements: The unit must be equipped with a low speed evaporator fan, as
determined by the Evaporator Fan speed select configuration variable.
P3
Low Speed Evaporator Fans
NOTE
If the unit is configured for single evaporator fan operation, Pre-Trip tests
P3-0, P3-1, P4-0 and P4-1 will fail immediately if Controller alarm codes
AL11 or AL12 are active at the start of testing.
P3-0
Setup: The high speed evaporator fans will be turned on for 10 seconds, then off
Low Speed Evapo- for two seconds, then the low speed evaporator fans are turned on. A current
rator Fan Motors On draw test is done after 60 seconds.
Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test.
P3-1
Setup: The low speed Evaporator Fan is turned off, a current draw test is done
Low Speed Evapo- after 10 seconds.
rator Fan Motors Off Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test.
P4-0
Setup: The high speed Evaporator Fan is turned on, a current draw test is done
High Speed Evapo- after 60 seconds.
rator Fan Motors On Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test.
P4-1
Setup: The high speed Evaporator Fan is turned off, a current draw test is done
High Speed Evapo- after 10 seconds.
rator Fan Motors Off Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test.
P5-0
Supply/Return Probe
Test
Setup: The High Speed Evaporator Fan is turned on and run for eight minutes,
with all other outputs de-energized.
Pass/Fail Criteria: A temperature comparison is made between the return and
supply probes.
NOTE
If this test fails, “P5-0” and “FAIL” will be displayed. If both Probe tests (this
test and the PRIMARY/ SECONDARY) pass, the display will read “P5”
“PASS.”
3-21
T-317
Table 3-7 Controller Pre-Trip Test Codes (Sheet 2 of 4)
Requirements: For units equipped with secondary supply probe only.
Pass/Fail Criteria: The temperature difference between primary and secondary
probe (supply) is compared.
P5-1
Supply Probe Test
P5-2
Return Probe Test
NOTE
If this test fails, “P5-1” and FAIL will be displayed. If both Probe tests (this
and the SUPPLY/ RETURN TEST) pass, because of the multiple tests, the
display will read ’P 5’ ’PASS’.
Requirements: For units equipped with secondary return probe only.
Pass/Fail Criteria: The temperature difference between primary and secondary
probe (return) is compared.
NOTES
1. If this test fails, “P5-2” and “FAIL” will be displayed. If both Probe tests
(this test and the SUPPLY/ RETURN) pass, because of the multiple
tests, the display will read “P 5,” “PASS.”
2. The results of Pre-Trip tests 5-0, 5-1 and 5-2 will be used to activate or
clear control probe alarms.
P-6
P6-0
Compressor On
P6--H & P6L
P6-2
Suction Modulation
Valve (Open and
Closed)
P6-3
Quench Valve Test
P6-4
P6-5
Not Applicable
Not Applicable
Not Applicable
Setup: A current draw test is performed before the compressor is started. The
compressor is started. SMV is opened and another current draw test is performed.
Pass/Fail Criteria: Passes if the change in compressor current draw is within the
specified range.
Not Applicable
Setup: The compressor and fans continue to run from the previous test. The
quench valve (if configured) will operate as in normal control mode. The SMV is
closed to 0% open, current and condenser pressure readings are taken. The
SMV is opened to 50% with continuous current and condenser pressure readings taken to establish maximum values. The SMV is returned to 0% open and
final readings are taken.
Pass/Fail Criteria: Passes if the calculated difference in current at the 50%
open position are above a specified value before and after opening of the SMV,
OR the calculated difference in condenser pressure at the 50% open position are
above a specified value before and after opening of the SMV
Setup: The compressor suction temperature is measured with the Quench valve
closed. The Quench valve is energized and the suction temperature drop is
checked.
Pass/Fail Criteria: Passes if suction temperature is within the valid range.
Not Used
Not Used
NOTE
P7-0 & P8 are included with the “Auto2 & Auto 3” only. P9-0 through P10 are included with “Auto2” only
P7--0
T-317
High Pressure
Switch Closed
Setup: When the unit is running, the condenser fan is de-energized, and a 15
minute timer is started. The right display shows discharge pressure if the unit is
equipped with a discharge pressure transducer (DPT). If no DPT is installed, the
condenser pressure transducer (CPT) reading will be displayed.
Pass/Fail Criteria: The test fails if high pressure switch fails to open in 15 minutes.
3-22
Table 3-7 Controller Pre-Trip Test Codes (Sheet 3 of 4)
Note, this test is skipped if the unit does NOT have:
A compressor discharge sensor (CPDS).
A discharge pressure transducer (DPT).
Condenser pressure transducer (CPT).
In addition, this test is skipped if:
The sensed ambient temperature is less than 7_C (45_F).
The return air temperature is less than --17.8_C (0_F).
P7-0
High Pressure
Switch Closed
(Continued)
The water pressure switch (WP) is open, indicating that the unit is operating
with a water-cooled condenser.
Pass/Fail Criteria: Under conditions of the above NOTE; the test immediately
fails if the following inputs are sensed to be invalid:
Compressor discharge sensor (CPDS).
Discharge pressure transducer (DPT).
Condenser pressure transducer (CPT).
OR, if any one of the following inputs are sensed to be invalid:
Return temperature sensor (RTS).
Ambient sensor (AMBS).
In addition, the test will fail if:
The high pressure switch (HPS) fails to open within 15 minutes.
The discharge temperature exceeds 138_C (280_F).
The discharge temperature is less than or equal to ambient temperature
plus 5_C (9_F).
P7-1
High Pressure
Switch Open
P8-0
Perishable Mode
Heat Test
P8-1
Perishable Mode
Pull Down Test
The condenser pressure transducer (CPT) or discharge pressure transducer (DPT) pressure exceeds 27.42 kg/cm2 (390 psig).
Requirements: Test P7-0 must pass for this test to execute. Setup: The condenser fan is started and a 60 second timer is started.
Pass/Fail Criteria: Passes the test if the high pressure switch (HPS) closes
within the 60 second time limit, otherwise, it fails.
Setup: If the container temperature is below 15.6°C (60_F), the set point is
changed to 15.6°C, and a 60 minute timer is started. The left display will read
“P8-0.” The control will then heat the container until 15.6°C is reached. If the
container temperature is above 15.6°C at the start of the test, then the test proceeds immediately to test P8-1 and the left display will change to “P8-1.”
Pass/Fail Criteria: The test fails if the 180 minute timer expires before the control temperature reaches set point. The display will read “P8-0,” “FAIL.”
Requirements: Control temperature must be at least 15.6°C (60_F).
Setup: The set point is changed to 0°C (32_F), and a 180 minute timer is
started. The left display will read “P8-1,” the right display will show the supply air
temperature. The unit will then start to pull down the temperature to the 0°C set
point.
Pass/Fail Criteria: The test passes if the container temperature reaches set
point before the 180 minute timer expires.
3-23
T-317
Table 3-7 Controller Pre-Trip Test Codes (Sheet 4 of 4)
P8-2
Perishable Mode
Maintain Temperature Test
P9-0
Defrost Test
P10-0
Frozen Mode
Setup Test
P10-1
Frozen Mode (Pull
Down) Test
P10-2
Frozen Mode Maintain Temperature
Test
T-317
Requirements: Test P8-1 must pass for this test to execute.
Setup: The left display will read “P8-2,” and the right display will show the supply
air temperature. A 60 minute timer is started. The unit will be required to maintain the 0°C temperature to within + or -- 0.5_C (0.9_F) of set point until a DataCORDER recording is executed. The recorder supply probe temperature running
total (and its associated readings counter) will be zeroed out for the remainder of
the recording period at the start of this test, so that the actual value recorded in
the DataCORDER will be an average of only this test’s results. Once a recording
interval is complete, the average recorder supply temperature will be recorded in
the DataCORDER, as well as stored in memory for use in applying the test pass/
fail criteria.
Pass/Fail Criteria: If the recorded temperature is within +/-- 0.5_C. of set point
from test start to DataCORDER recording, the test passes. If the average temperature is outside of the tolerance range at the recording, the test fails.
Setup: The defrost temperature sensor (DTS) reading will be displayed on the
left display. The right display will show the supply air temperature. The unit will
run FULL COOL for 30 minutes maximum until the DTT is considered closed.
Once the DTT is considered closed, the unit simulates defrost by running the
heaters for up to two hours, or until the DTT is considered open.
Pass/Fail Criteria: The test fails if: the DTT is not considered closed after the 30
minutes of full cooling, HTT opens when DTT is considered closed or if return air
temperature rises above 248_C (120_F).
Setup: After completion of the defrost test, the testing proceeds directly to test
P10--1 if the container temperature is above 7_C (45_F). If the container temperature is below 7_C, a 180 minute timer will be started, the set point will be set to
7_C and the control will be placed in normal heat. The left display will read
“P10--0” and the unit will continue in operation until the temperature is raised to
set point.
Pass/Fail Criteria: If the temperature does not reach set point(less --0.3_C or
6.7 F) before the timer times out display will read “P100,” “FAIL”. The test will not
auto--repeat.
Setup: When the container temperature is greater than or equal to the 7.2°C
(45_F) set point which was set in the frozen mode heat test, the left display will
read “P10--1” and the right display will show the return air temperature. The set
point will then be changed to --17.7_C (0_F). The unit will then have a maximum
of three hours to pull the container temperature down to the --17.7°C set point.
Pass/Fail Criteria: If this occurs within the three hour time limit, the test passes.
If pulldown is not completed within the three hour time, the test fails.
Setup: After the unit has successfully completed frozen pulldown test, the left
display will read “P10--2” and the right display will show return air temperature.
The unit will then be required to maintain --17.7°C (0_F) temperature within +/-0.5_C (0.9_F) of set point until a DataCORDER recording is executed. The
recorder return probe temperature running total (and its associated counter) will
be zeroed for the remainder of the recording period at the start of this test, so
that the actual recorded value will be an average of only this test’s results. Once
the recording interval is complete, the average return temperature will be
recorded in the DataCORDER, and stored in memory for use in applying the test
pass/fail criteria.
Pass/Fail Criteria: If the recorded temperature is within +/-- 0.5_C of set point
from test start to DataCORDER recording, the test passes. If temperature is outside of the tolerance range at the DataCORDER recording, the test fails.
3-24
Table 3-8 DataCORDER Function Code Assignments
NOTE
Inapplicable Functions Display “-- -- -- -- -- ”
To Access: Press ALT. MODE key
Code
No.
TITLE
DESCRIPTION
dC1
Recorder Supply
Temperature
Current reading of the supply recorder sensor.
dC2
Recorder Return
Temperature
Current reading of the return recorder sensor.
dC3-5
USDA 1,2,3 TemperCurrent readings of the three USDA probes.
atures
dC6-13
Network Data
Points 1-8
Current values of the network data points (as configured). Data point 1 (Code
6) is generally the humidity sensor and its value is obtained from the Controller once every minute.
Cargo Probe 4 Temperature
Current reading of the cargo probe #4.
dC14
dC15-19 Future Expansion
Temperature SendC20-24 sors 1-5 Calibration
dC25
Future Expansion
dC26,27
S/N, Left 4, Right 4
dC28
Minimum Days Left
dC29
Days Stored
dC30
dC31
dC32
dC33
dC34
dC35
These codes are for future expansion, and are not in use at this time.
Current calibration offset values for each of the five probes: supply, return,
USDA #1, #2, and #3. These values are entered via the interrogation program.
This code is for future expansion, and is not in use at this time..
The DataCORDER serial number consists of eight characters. Function code
dC26 contains the first four characters. Function code dC27 contains the last
four characters. (This serial number is the same as the Controller serial number)
An approximation of the number of logging days remaining until the DataCORDER starts to overwrite the existing data.
Number of days of data that are currently stored in the DataCORDER.
The date when a Trip Start was initiated by the user. In addition, if the system
Date of last Trip start goes without power for seven continuous days or longer, a trip start will automatically be generated on the next AC power up.
Shows the current status of the optional battery pack.
PASS: Battery pack is fully charged.
Battery Test
FAIL: Battery pack voltage is low.
Time: Hour, Minute
Current time on the real time clock (RTC) in the DataCORDER.
Date: Month, Day
Current date (month and day) on the RTC in the DataCORDER.
Date: Year
Current year on the RTC in the DataCORDER.
Cargo Probe 4
Current calibration value for the Cargo Probe. This value is an input via the
Calibration
interrogation program.
3-25
T-317
Table 3-9 DataCORDER Pre-Trip Result Records
Test
No.
TITLE
1-0
1-1
Heater On
Heater Off
2-0
Condenser Fan On
2-1
6-4
6-5
Condenser Fan Off
Low Speed Evaporator Fan
On
Low Speed Evaporator Fan
Off
High Speed Evaporator Fan
On
High Speed Evaporator Fan
Off
Supply/Return Probe Test
Secondary Supply Probe Test
Secondary Return Probe Test
Compressor On
Not Applicable
Suction Modulation Valve
Open and Closed
Not Applicable
Not Applicable
7-0
High Pressure Switch Closed
7-1
High Pressure Switch Open
8-0
8-1
Perishable Heat
Perishable Pull Down
8-2
Perishable Maintain
9-0
Defrost Test
10-0
10-1
Frozen Mode Set-up
Frozen Mode Pull Down
10-2
Frozen Mode Maintain
3-0
3-1
4-0
4-1
5-0
5-1
5-2
6-0
6-1
6-2
T-317
DATA
Pass/Fail/Skip Result, Change in current for Phase A, B and C
Pass/Fail/Skip Result, Change in currents for Phase A, B and C
Pass/Fail/Skip Result, Water pressure switch (WPS) -- Open/Closed,
Change in currents for Phase A, B and C
Pass/Fail/Skip Result, Change in currents for Phase A, B and C
Pass/Fail/Skip Result, Change in currents for Phase A, B and C
Pass/Fail/Skip Result, Change in currents for Phase A, B and C
Pass/Fail/Skip Result, Change in currents for Phase A, B and C
Pass/Fail/Skip Result, Change in currents for Phase A, B and C
Pass/Fail/Skip Result, STS, RTS, SRS and RRS
Pass/Fail/Skip Result
Pass/Fail/Skip Result
Pass/Fail/Skip Result, Change in currents for Phase A, B and C
Not Used
Pass/Fail/Skip Result, Is current or pressure limit in effect (Y,N)
Not Used
Not Used
Pass/Fail/Skip Result, AMBS, DPT or CPT (if equipped)
Input values that component opens
Pass/Fail/Skip Result, STS, DPT or CPT (if equipped)
Input values that component closes
Pass/Fail/Skip Result, STS, time it takes to heat to 16_C (60_F)
Pass/Fail/Skip Result, STS, time it takes to pull down to 0_C (32_F)
Pass/Fail/Skip Result, Averaged DataCORDER supply temperature
(SRS) over last recording interval.
Pass/Fail/Skip Result, DTS reading at end of test, line voltage, line
frequency, time in defrost.
Pass/Fail/Skip Result, STS, time unit is in heat.
Pass/Fail/Skip Result, STS, time to pull down unit to --17.8_C (0_F).
Pass/Fail/Skip Result, Averaged DataCORDER return temperature
(RRS) over last recording interval.
3-26
Table 3-10 DataCORDER Alarm Indications
To Access: Press ALT. MODE key
Code No.
TITLE
DESCRIPTION
The supply recorder sensor reading is outside of the range of --50_C to
70_C (--58_F to +158_F) or, the probe check logic has determined there is
Recorder Supply Tem- a fault with this sensor.
dAL70
perature Out of Range
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm.
The return recorder sensor reading is outside of the range of --50_C to
70_C (--58_F to +158_F) or, the probe check logic has determined there is
Recorder Return Tem- a fault with this sensor.
dAL71
perature Out of Range
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm.
USDA Temperatures
The USDA probe temperature reading is sensed outside of --50 to 70°C
dAL72-74 1, 2, 3 Out of Range
(--58 to 158°F) range.
dAL75
Cargo Probe 4 Out of
Range
The cargo probe temperature reading is outside of --50 to 70°C (--58 to
158°F) range.
dAL76, 77
Future Expansion
dAL78-85
Network Data Point
1 -- 8 Out of Range
These alarms are for future expansion, and are not in use at this time.
The network data point is outside of its specified range. The DataCORDER is configured by default to record the supply and return recorder sensors. The DataCORDER may be configured to record up to 8 additional
network data points. An alarm number (AL78 to AL85) is assigned to each
configured point. When an alarm occurs, the DataCORDER must be interrogated to identify the data point assigned. When a humidity sensor is
installed, it is usually assigned to AL78.
dAL86
RTC Battery Low
The Real Time Clock (RTC) backup battery is too low to adequately maintain the RTC reading.
dAL87
RTC Failure
An invalid date or time has been detected. This situation may be corrected
by changing the Real Time Clock (RTC) to a valid value using DataLINE.
dAL88
DataCORDER
EEPROM Failure
A write of critical DataCORDER information to the EEPROM has failed.
dAL89
Flash Memory Error
An error has been detected in the process of writing daily data to the nonvolatile FLASH memory.
dAL90
dAL91
Future Expansion
Alarm List Full
This alarm is for future expansion, and is not in use at this time.
The DataCORDER alarm queue is determined to be full (eight alarms).
3-27
T-317
SECTION 4
OPERATION
power source. Place circuit breaker (CB-1) in position
“I” (ON). Close and secure control box door
4.1 INSPECTION (Before Starting)
WARNING
4.2.2 Connection to190/230 vac Power
An autotransformer (Figure 4-1) is required to allow
operation on nominal 230 volt power. It is fitted with a
230 vac cable and a receptacle to accept the standard
460 vac power plug. The 230 volt cable is black in color
while the 460 volt cable is yellow. The transformer may
also be equipped with a circuit breaker (CB-2). The
transformer is a step up transformer that will provide
380/460 vac, 3-phase, 50/60 hertz power to the unit
when the 230 vac power cable is connected to a
190/230 vac, 3-phase power source.
Beware of unannounced starting of the
evaporator and condenser fans. The unit
may cycle the fans and compressor unexpectedly as control requirements dictate.
a. If container is empty, check inside for the following:
1. Check channels or “T” bar floor for cleanliness.
Channels must be free of debris for proper air circulation.
1. Make sure that the start-stop switch (ST, on control
panel) and circuit breakers CB-1 (in the control box
and CB-2 (on the transformer) are in position “0”
(OFF). Plug in and lock the 460 vac power plug at the
receptacle on the transformer
2. Check container panels, insulation and door seals
for damage. Effect permanent or temporary repairs.
3. Visually check evaporator fan motor mounting bolts
for proper securement (refer to paragraph 6.16).
4. Check for dirt or grease on evaporator fan or fan
deck and clean if necessary.
5. Check evaporator coil for cleanliness or obstructions. Wash with fresh water.
6. Check defrost drain pans and drain lines for obstructions and clear if necessary. Wash with fresh water.
2. Plug the 230 vac (black) cable into a de-energized
190/230 vac, 3-phase power source. Energize the
power source. Set circuit breakers CB-1 and CB2 to
position “I” (ON). Close and secure control box door.
7. Check panels on refrigeration unit for loose bolts and
condition of panels. Make sure T.I.R. devices are in
place on access panels.
b. Check condenser coil for cleanliness. Wash with
fresh water.
2
c. Open control box door. Check for loose electrical connections or hardware.
d. Check color of moisture-liquid indicator.
1
3
e. Check oil level in compressor sight glass.
4.2 CONNECT POWER
WARNING
1. Dual Voltage Modular Autotransformer
2. Circuit Breaker (CB-2) 230V
3. 460 vac Power Receptacle
Do not attempt to remove power plug(s) before turning OFF start-stop switch (ST), unit
circuit breaker(s) and external power
source.
Figure 4-1 Autotransformer
4.3 ADJUST FRESH AIR MAKEUP VENT
WARNING
The purpose of the fresh air makeup vent is to provide
ventilation for commodities that require fresh air
circulation. The vent must be closed when transporting
frozen foods.
Make sure the power plugs are clean and
dry before connecting to any power receptacle.
Air exchange depends on static pressure differential,
which will vary depending on the container and how the
container is loaded.
4.2.1 Connection To 380/460 vac Power
1. Make sure start-stop switch (ST, on control panel)
and circuit breaker (CB-1, in the control box) are in
position “0” (OFF).
2. Plug the 460 vac (yellow) cable into a de-energized
380/460 vac, 3-phase power source. Energize the
Units may be equipped with a Vent Position Sensor
(VPS). The VPS determines the position of the fresh air
vent (upper or lower, as equipped) and sends data to the
controller display.
4-1
T-317
with 15 mm (0.6 inch) H2O external static above free
blow.
4.3.1 Upper Fresh Air Makeup Vent
Two slots and a stop are designed into the disc for air
flow adjustments. The first slot allows for a 0 to 30% air
flow, and the second slot allows for a 30 to 100% air flow.
To adjust the percentage of air flow, loosen the wing nut
and rotate the disc until the desired percentage of air
flow matches with the arrow. Tighten the wing nut. To
clear the gap between the slots, loosen the wing nut until
the disc clears the stop. Figure 4-2 gives air exchange
values for an empty container. Higher values can be
expected for a fully loaded container.
d. Air Sampling for Carbon Dioxide (CO2) Level
Loosen hex nuts and move the cover until the arrow on
the cover is aligned with the “atmosphere sampling port”
label. Tighten the hex nuts and attach a 3/8 hose to the
sampling port.
If the internal atmosphere content has reached an
unacceptable level, the operator may adjust the disc
opening to meet the required air flow volume to ventilate
the container.
69NT40 FRESH AIR MAKEUP
AIR
FLOW
(CMH)
240
ZERO EXTERNAL STATIC 50HZ
4.3.3 Fresh Air Position Sensor
The VPS allows the user to determine position of the
fresh air vent via function code 45. This function code is
accessible via the code select key.
The vent position will display for 30 seconds whenever
motion corresponding to 5 CMH (3 CFM) or greater is
detected. It will scroll in intervals of 5 CMH (3 CFM).
Scrolling to Function Code 45 will display the Fresh Air
Vent Position.
Data Recording of the Sensor Position -- The position of
the vent will be recorded in the DataCorder whenever
the unit is running under AC power and any of the
following:
Trip start
On every power cycle
Midnight
Manual change greater than 5 CMH (3 CFM) and
remains in that position for 4 minutes.
T-BAR
1-!/2”
T-BAR
210
2-%/8”
180
T-BAR
3”
150
120
90
60
30
0
0 10 20 30 40 50 60 70 80 90 100
PERCENT OPEN
NOTE
The user has 4 minutes to make necessary adjustments to the vent setting. This time begins
on the initial movement of the sensor. The vent
can be moved to any position within the 4 minutes. On completion of the first 4 minutes, the
vent is required to remain in stable for the next 4
minutes. If vent position changes are detected
during the 4 minutes stability period, an alarm
will be generated. This provides the user with
the ability to change the vent setting without
generating multiple events in the DataCorder.
For 60HZ operation multiply curves by 1.2
Figure 4-2 Make Up Air Flow Chart
4.3.2 Lower Fresh Air Makeup Vent
a. Full Open or Closed Positions
Maximum air flow is achieved by loosening the wing
nuts and moving the cover to the maximum open
position (100% position). The closed position is 0% air
flow position.The operator may also adjust the opening
to increase or decrease the air flow volume to meet the
required air flow.
b. Reduced Flow for Fresh Air Makeup
4.4 CONNECT WATER-COOLED CONDENSER
The water-cooled condenser is used when cooling
water is available and heating the surrounding air is
objectionable, such as in a ship’s hold. If water cooled
operation is desired, connect in accordance with the
following subparagraphs.
4.4.1 Water--Cooled Condenser with Water Pressure Switch
a. Connect the water supply line to the inlet side of condenser and the discharge line to the outlet side of the
condenser. (See Figure 2-5.)
b. Maintain a flow rate of 11 to 26 liters per minute (3 to 7
gallons per minute). The water pressure switch will
open to de-energize the condenser fan relay. The
condenser fan motor will stop and will remain stopped
until the water pressure switch closes.
c. To shift to air-cooled condenser operation,disconnect
the water supply and the discharge line to the water-
On some models the air slide is supplied with two
adjustable air control disks. The fresh air makeup can be
adjusted for (15, 35, 50 or 75) cubic meters per hour
(CMH). The air flow has been established at 60HZ
power and 2 1/2 inch T bar and with 15mm (.6 inch) H2O
external static above free blow.
Loosen the hex nut and adjust each disk to the required
air flow and tighten hex nut.
NOTE
The main air slide is in the fully closed position
during reduced air flow operation.
c. Adjustment
The air slide is supplied with two adjustable air control
discs. The fresh air makeup can be adjusted for 15, 35,
50 and 75 cubic meters per hour (CFM). The air flow has
been established at 60 Hz power, and a 2 1/2 inch T bar,
T--317
4-2
cooled condenser. The refrigeration unit will shift to
air-cooled condenser operation when the water pressure switch closes.
4-3
T-317
4.4.2 Water-Cooled Condenser with Condenser
Fan Switch
4.7.2 Check Controller Function Codes
Check and, if required, reset controller Function Codes
(Cd27 through Cd39) in accordance with desired
operating parameters. Refer to paragraph 3.2.2.
a. Connect the water supply line to the inlet side of condenser and the discharge line to the outlet side of the
condenser. (See Figure 2-5.)
4.7.3 Start Temperature Recorder
b. Maintain a flow rate of 11 to 26 lpm (3 to 7 gpm).
Partlow Recorders
c. Set the condenser fan switch to position ”O”. This will
de-energize the condenser fan relay. The condenser
fan motor will stop and remain stopped until the CFS
switch is set to position ”I.”
a. Open recorder door and wind mechanical clock or
check battery of electronic recorder. Be sure key is returned to storage clip of mechanical recorder.
b. Lift stylus (pen) by pulling the marking tip outward until the stylus arm snaps into it’s retracted position.
CAUTION
c. Install new chart making sure chart is under the four
corner tabs. Lower the stylus until it has made contact
with the chart. Close and secure door.
When condenser water flow is below 11 lpm
(3 gpm) or when water-cooled operation is
not in use, the CFS switch MUST be set to
position ”1” or the unit will not operate
properly.
DataCORDER
a. Check and, if required, set the DataCORDER Configuration in accordance with desired recording parameter. Refer to paragraph 3.6.3.
d. To shift to air-cooled condenser operation, stop the
unit, set the CFS switch to position ”I” and restart the
unit. Disconnect the water lines to the water-cooled
condenser.
b. Enter a “Trip Start”. To enter a “trip Start”, do the following:
1. Depress the ALT MODE key and scroll to Code
dC30.
4.5 CONNECT REMOTE MONITORING
RECEPTACLE
2. Depress and hold the ENTER key for five seconds.
If remote monitoring is required, connect remote
monitor plug at unit receptacle. When the remote
monitor plug is connected to the remote monitoring
receptacle, the following remote circuits are energized:
CIRCUIT
Sockets B to A
Sockets C to A
Sockets D to A
3. The “Trip Start” event will be entered in the DataCORDER.
4.7.4 Complete Inspection
FUNCTION
Energizes remote cool light
Energizes remote defrost light
Energizes remote in-range light
Allow unit to run for 5 minutes to stabilize conditions and
perform a pre--trip diagnosis in accordance with the
following paragraph.
4.8 PRE-TRIP DIAGNOSIS
CAUTION
4.6 STARTING AND STOPPING INSTRUCTIONS
WARNING
Pre-trip inspection should not be performed with critical temperature cargoes in
the container.
Make sure that the unit circuit breaker(s)
(CB-1 & CB-2) and the START-STOP switch
(ST) are in the “O” (OFF) position before
connecting to any electrical power source.
CAUTION
4.6.1 Starting the Unit
When Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated.
At the completion of Pre-Trip activity, dehumidification and bulb mode must be reactivated.
1. With power properly applied, the fresh air damper set
and (if required) the water cooled condenser connected, (refer to paragraphs 4.2, 4.3 & 4.4) place the
START-STOP switch to “I” (ON).
2. Continue with Start Up Inspection, paragraph 4.7.
Pre-Trip diagnosis provides automatic testing of the unit
components using internal measurements and
comparison logic. The program will provide a “PASS” or
“FAIL” display to indicate test results.
4.6.2 Stopping the Unit
To stop the unit, place the START-STOP switch in
position “0” (OFF).
The testing begins with access to a pre-trip selection
menu. The user may have the option of selecting one of
three automatic tests (depending on software revision
installed). These tests will automatically perform a
series of individual pre--trip tests. The user may also
scroll down to select any of the individual tests. The
contents of the menus are as follows:
4.7 START--UP INSPECTION
4.7.1 Physical Inspection
a. Check rotation of condenser and evaporator fans.
b. Check compressor oil level. (Refer to paragraph
6.8.6.)
T--317
4-4
on the right display, with the corresponding test number to the left. The user may then press the DOWN
ARROW to repeat the test, the UP ARROW to skip to
the next test or the PRE--TRIP key to terminate testing. The unit will wait indefinitely, until the user manually enters a command.
PRE-TRIP SELECTION MENU
Auto or Auto 1 Auto 2
Auto 3
P, P1, P2, P3,
P4, P5, P6,
rSLts
P, P1, P2, P3,
P4, P5, P6, P7,
P8, rSLts
P, P1, P2, P3,
P4, P5, P6, P7,
P8, P9, P10,
rSLts
CAUTION
A detailed description of the pre-trip test codes is listed
in Table 3-7, page 3-21. If no selection is made, the
pre-trip menu selection process will terminate
automatically. However, dehumidification and bulb
mode must be reactivated manually if required.
When Pre--Trip test Auto 2 runs to completion without being interrupted, the unit will
terminate pre-trip and display “Auto 2”
“end.” The unit will suspend operation until
the user depresses the ENTER key!
Scrolling down to the “rSLts” code and pressing ENTER
will allow the user to scroll through the results of the last
pre--trip testing run. If no pre--testing has been run (or an
individual test has not been run) since the unit was
powered up “--------” will be displayed.
When an Auto test runs to completion without a failure, the unit will exit the pre-trip mode, and return to
normal control operation. If configuration variable
CnF42 is set to IN, a datacorder trip start will be entered. If CnF42 is set to OUT, the trip start will not be
entered. However, dehumidification and bulb mode
must be reactivated manually if required.
To start a pre--trip test, do the following:
NOTE
1. Prior to starting tests, verify that unit
voltage (Function Code Cd 07) is within
tolerance and unit amperage draw
(Function Codes Cd04, Cd05, Cd06) is
within expected limits. Otherwise, tests
may fail incorrectly.
c. TO RUN AN INDIVIDUAL TEST: Scroll through the
selections by pressing the UP ARROW or DOWN
ARROW keys to display an individual test code.
Pressing ENTER when the desired test code is displayed.
1. Individually selected tests, other than the LED/Display test, will perform the operations necessary to
verify the operation of the component. At the conclusion, PASS or FAIL will be displayed. This message
will remain displayed for up to three minutes, during
which time a user may select another test. If the
three minute time period expires, the unit will terminate pre-trip and return to control mode operation.
2. All alarms must be rectified and cleared
before starting tests.
3. Pre-trip diagnosis may also be initiated via
communications. The operation is the
same as for the key pad initiation described
below except that should a test fail, the
pre-trip mode will automatically terminate.
When initiated via communications, a test
may not be interrupted with an arrow key,
but the pre-trip mode can be terminated
with the PRE-TRIP key.
2. While the tests are being executed, the user may terminate the pre-trip diagnostics by pressing and holding the PRE-TRIP key. The unit will then resume normal operation. If the user decides to terminate a test
but remain at the test selection menu, the user may
press the UP ARROW key. When this is done all test
outputs will be de-energized and the test selection
menu will be displayed.
a. Press the PRE-TRIP key. This accesses a test selection menu.
b. TO RUN AN AUTOMATIC TEST: Scroll through the
selections by pressing the UP ARROW or DOWN
ARROW keys to display AUTO, AUTO 2 or AUTO 3
as desired and then press the ENTER key.
3. Throughout the duration of any pre-trip test except
the P-7 high pressure switch tests, the current and
pressure limiting processes are active .
d. Pre-Trip Test Results
1. The unit will execute the series of tests without any
need for direct user interface. These tests vary in
length, depending on the component under test.
At the end of the pre-trip test selection menu, the
message “P,” “rSLts” (pre--trip results) will be displayed.
Pressing the ENTER key will allow the user to see the
results for all subtests (i.e., 1-0, 1-1, etc). The results will
be displayed as “PASS” or “FAIL” for all the tests run to
completion since power up. If a test has not been run
since power up, “-- -- -- -- -- ” will be displayed. Once all
pre--test activity is completed, dehumidification and
bulb mode must be reactivated manually if required.
2. While tests are running, “P#-#” will appear on the left
display, where the #’s indicate the test number and
sub-test. The right display will show a countdown time
in minutes and seconds, indicating how much time
there is left remaining in the test.
CAUTION
4.9 OBSERVE UNIT OPERATION
4.9.1 Crankcase Heater
When a failure occurs during automatic
testing the unit will suspend operation
awaiting operator intervention.
When the crankcase heater is installed, it will be
operational whenever the compressor is off and there is
power to the unit. The heater is connected to a set of
normally closed auxiliary contacts on the compressor
contactor.
When an automatic test fails, it will be repeated once .
A repeated test failure will cause “FAIL” to be shown
4-5
T-317
In this configuration, a probe check will not be run as a
part of a normal defrost, but only as a part of a defrost
initiated due to a diagnostic reading outside of the limits.
4.9.2 Probe Check
If the DataCORDER is off, or in alarm mode the
controller will revert to a four probe configuration which
includes the DataCORDER supply and return air probes
as the secondary controller probes. The controller
continuously performs probe diagnosis testing which
compares the four probes. If the probe diagnosis result
indicates a probe problem exists, the controller will
perform a probe check to identify the probe(s) in error.
c.The 30 minute timer will be reset at each of the following conditions:
1. At every power up.
2. At the end of every defrost.
3. After every diagnostic check that does not fall outside of the limits as outlined above.
a. Probe Diagnostic Logic -- Standard
d. Probe Check
If the probe check option (controller configuration code
CnF31) is configured for standard, the criteria used for
comparison between the primary and secondary
control probes is:
A defrost cycle probe check is accomplished by
energizing just the evaporator motors for eight minutes
at the end of the normal defrost. At the end of the eight
minute period the probes will be compared to a set of
predetermined limits. The defrost indicator will remain
on throughout this period.
1_C (1.8_F) for perishable set points or 2_C (3.6_F)
for frozen set points.
Any probe(s) determined to be outside the limits will
cause the appropriate alarm code(s) to be displayed to
identify which probe(s) needs to be replaced. The P5
Pre-Trip test must be run to inactivate alarms.
If 25 or more of 30 readings taken within a 30 minute
period are outside of the limit, then a defrost is initiated and a probe check is performed.
In this configuration, a probe check will be run as a part
of every normal (time initiated) defrost.
4.10 SEQUENCE OF OPERATION
General operation sequences for cooling, heating and
defrost are provided in the following subparagraphs.
Schematic representation of controller action are
provided in Figure 4-3 and Figure 4-4. Refer to Section
3 for detailed descriptions of special events and timers
that are incorporated by the controller in specific modes
of operation.
b. Probe Diagnostic Logic -- Special
If the probe check option is configured for special the
above criteria are applicable. A defrost with probe check
will be initiated if 25 of 30 readings or 10 consecutive
readings are outside of the limits
FALLING
TEMPERATURE
+2.5_C (4.5_F)
RISING
TEMPERATURE
+1.5_C (2.7_F)
MODULATING
COOLING
AIR CIRCULATION
+1_C (1.8_F)
+0.5_C (0.9_F)
+.20_C
SET POINT
--0.20_C
- 0.5_C (0.9_F)
MODULATING
COOLING
AIR CIRCULATION
- 1_C (1.8_F)
HEATING
- 1.5_C (2.7_F)
HEATING
Figure 4-3 Controller Operation -- Perishable Mode
T--317
4-6
FALLING
TEMPERATURE
RISING
TEMPERATURE
+1.5_C (2.7_F)
+1_C (1.8_F)
COOLING
COOLING
+0.5_C (0.9_F)
+.20_C
SET POINT
--0.20_C
- 0.5_C (0.9_F)
AIR
CIRCULATION
ONLY
- 1_C (1.8_F)
AIR
CIRCULATION
ONLY
- 1.5_C (2.7_F)
Figure 4-4 Controller Operation -- Frozen Mode
ENERGIZED
DE--ENERGIZED
FOR FULL DIAGRAM AND
LEGEND, SEE SECTION 7
NOTE
In low temperature ambients the condenser fan
will be cycled by the controller to maintain proper condensing pressure.
a. With supply air temperature above set point and decreasing, the unit will be cooling with the condenser
fan motor (CF), compressor motor (CH), evaporator
fan motors (EF) energized and the COOL light illuminated. (See Figure 4-5.)
b. When the air temperature decreases to a predetermined tolerance above set point, the in-range light is
illuminated.
c. As the air temperature continues to fall, modulating
cooling starts at approximately 2.5_C (4.5_F) above
set point. (See Figure 4-3)
d. The controller monitors the supply air. Once the supply air falls below set point and 0% SMV position is
reached, the controller periodically records the supply air temperature, set point and time. A calculation
is then performed by subtracting the set point reading
from the supply air and multiplying the result by the
time reading. The result is negative number.
e. When the calculation reaches --250, contacts TC and
TN are opened to de-energize compressor and condenser fan motors. The cool light is also de-energized.
f. The evaporator fan motors continue to run to circulate
air throughout the container. The in-range light remains illuminated as long as the supply air is within
tolerance of set point.
g. When the supply air temperature increases to 0.2_C
(0.4_F) above set point and the three minute off time
has elapsed, relays TC and TN are energizes to restart the compressor and condenser fan motors. The
cool light is also illuminated.
CONTROL TRANSFORMER
POWER TO
CONTROLLER
SIGNAL TO
CONTROLLER
SIGNAL TO
CONTROLLER
NOTE: HIGH SPEED EVAPORATOR FAN SHOWN. FOR LOW SPEED
CONTACT TE IS DE--ENERGIZED AND CONTACT TV IS ENERGIZED
Figure 4-5 Perishable Mode Cooling
4.10.1 Sequence Of operation -- Perishable Mode
Cooling
NOTE
In the Conventional Perishable Mode of operation the evaporator motors run in high speed. In
the Economy Perishable Mode the fan speed is
varied.
4-7
T-317
fan motors (ES) energized and the COOL light illuminated. (See Figure 4-7.)
b.When the air temperature decreases to a predetermined tolerance above set point, the in-range light is
illuminated.
4.10.2 Sequence Of Operation -Perishable Mode Heating
NOTE
The unit will heat only when in the Perishable
Mode, relay TH is electronically locked out
when in the Frozen Mode.
ENERGIZED
DE--ENERGIZED
FOR FULL DIAGRAM AND
LEGEND, SEE SECTION 7
a. If the air temperature decreases 0.5_C (0.9_F) below
set point, the system enters the heating mode. (See
Figure 4-3). The controller closes contacts TH (see
Figure 4-6) to allow power flow through the heat termination thermostat (HTT) to energize the heaters
(HR). The HEAT light is also illuminated. The evaporator fans continue to run to circulate air throughout
the container.
CONTROL TRANSFORMER
POWER TO
CONTROLLER
SIGNAL TO
CONTROLLER
b. When the temperature rises to 0.2_C (0.4_F) below
set point, contact TH opens to de--energize the heaters. The HEAT light is also de--energized. The evaporator fans continue to run to circulate air throughout
the container.
c. A safety heater termination thermostat (HTT), attached to an evaporator coil support, will open the
heating circuit if overheating occurs.
ENERGIZED
DE--ENERGIZED
FOR FULL DIAGRAM AND
LEGEND, SEE SECTION 7
SIGNAL TO
CONTROLLER
CONTROL TRANSFORMER
POWER TO
CONTROLLER
Figure 4-7 Frozen Mode
c. Contacts TC and TN are opened to de-energize the
compressor and condenser fan motors when the return air temperature decreases to 0.2_C (0.4_F) below set point. The cool light is also de-energized.
d. The evaporator fan motors continue to run to circulate
air throughout the container. The in-range light remains illuminated as long as the return air is within tolerance of set point.
e. When the return air temperature increases to 0.2_C
(0.4_F) above set point and the three minute off time
has elapsed, relays TC and TN are energizes to restart the compressor and condenser fan motors. The
cool light is also illuminated.
4.10.4 Sequence Of Operation -- Defrost
The defrost cycle may consist of up to three distinct
operations. The first is de-icing of the coil, the second is
a probe check cycle and the third is snap freeze.
Defrost may be requested by any one of the following
methods:
1. The manual defrost function (also manual defrost
switch function if equipped) is initiated by the user.
Through the use of the keypad or manual defrost
switch (if equipped).
Manual Defrost/Interval key operation:
Depressing and holding the Defrost Interval key for
five (5) seconds will initiate defrost. If the defrost interval key is released in less than five (5) seconds,
defrost interval (code 27) shall be displayed.
2. The user sends a defrost request by communications.
3. The defrost interval timer (controller function code
Cd27) reaches the defrost interval set by the user.
SIGNAL TO
CONTROLLER
SIGNAL TO
CONTROLLER
Figure 4-6 Perishable Mode Heating
4.10.3 Sequence Of operation -- Frozen Mode
Cooling
NOTE
1. In the Frozen Mode of operation the
evaporator motors run in low speed.
2. In low temperature ambients the
condenser fan will be cycled by the
controller to maintain proper condensing
pressure.
a. With supply air temperature above set point and decreasing, the unit will be cooling with the condenser
fan motor (CF), compressor motor (CH), evaporator
T--317
4-8
4. The controller probe diagnostic logic determines that
a probe check is necessary based on the temperature values currently reported by the supply and return probes.
5. The controller Demand Defrost configuration variable (CnF40) is set to “In” and the unit has been in
pull down operation for over 2.5 hours without reaching set point.
ENERGIZED
DE--ENERGIZED
FOR FULL DIAGRAM AND
LEGEND, SEE SECTION 7
When a request for defrost is made by probe check, the
unit will enter defrost when the Defrost Temperature
Sensor reading is at or below 25.6°C(78°F). The unit will
terminate defrost when the Defrost Temperature
Sensor reading rises above 25.6°C(78°F)
When a request for defrost is made by demand defrost ,
the unit will enter defrost when the reading at the Defrost
Temperature Sensor is at or below 18°C (64.4°F).
Defrost will terminate when the Defrost Sensor
Temperature reading rises above the CnF41 setting.
CONTROL TRANSFORMER
When a defrost has terminated, the defrost interval
timer will begin counting when the reading at the Defrost
Temperature Sensor is at or below 10°C(50°F). Once
the timer has counted the required time, the unit will
enter defrost if the Defrost Temperature Sensor is at or
below 25.6°C(78°F). Defrost will terminate when the
Defrost Sensor Temperature reading rises above the
CnF41 setting.
POWER TO
CONTROLLER
SIGNAL TO
CONTROLLER
When the unit enters defrost, the controller opens
contacts TC, TN and TE (or TV) to de-energize the
compressor, condenser fan and evaporator fans. (See
Figure 4-8.) The COOL light is also de--energized.
SIGNAL TO
CONTROLLER
The controller then closes TH to supply power to the
heaters. The defrost light is illuminated.
SIGNAL TO
CONTROLLER
When the defrost temperature sensor reading rises to
the applicable Defrost Termination Thermostat
“opening” point the de--icing operation is terminated.
Figure 4-8 Defrost
Processing of a defrost request is controlled by the
Defrost Termination Thermostat. The Defrost
Termination Thermostat is not a physical component. It
is a software point that acts as a thermostat, allowing
defrost when it is considered “closed” and preventing or
terminating defrost when it is considered “open”. The
actual temperatures used to make the “open” or
“closed” determinations are dependent on the type of
defrost request made and the operator setting of
configuration variable CnF41. Configuration variable
CnF41may be factory set at the default value of
25.6°C(78°F) or a lower value of 18°C(64°F).
When a request for defrost is made by the use of the
Manual Defrost Switch or Communications, the unit will
enter defrost when the reading at the Defrost
Temperature Sensor is at or below the CnF41 setting.
Defrost will terminate when the Defrost Sensor
Temperature reading rises above the CnF41 setting.
If defrost does not terminate correctly and temperature
reaches the set point of the heat termination thermostat
(HTT) the thermostat will open to de--energize the
heaters. If termination does not occur within 2.0 hours,
the controller will terminate defrost. An alarm will be
given of a possible DTS failure.
If probe check (controller function code CnF31) is
configured to special, the unit will proceed to the next
operation (snap freeze or terminate defrost). If the code
is configured to standard, the unit will perform a probe
check. The purpose of the probe check is to detect
malfunctions or drift in the sensed temperature that is
too small to be detected by the normal sensor out of
range tests. The system will run for eight minutes in this
condition. At the end of the eight minutes, probe alarms
will be set or cleared based on the conditions seen.
4-9
T-317
SECTION 5
TROUBLESHOOTING
CONDITION
POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
5.1 UNIT WILL NOT START OR STARTS THEN STOPS
External power source OFF
Start-Stop switch OFF or defective
No power to unit
Circuit breaker tripped or OFF
Autotransformer not connected
Circuit breaker OFF or defective
Control transformer defective
Loss of control power
Fuses (F3A , F3B) blown
Start-Stop switch OFF or defective
Evaporator fan motor internal protector open
Condenser fan motor internal protector open
Compressor internal protector open
Component(s) Not Operating
High pressure switch open
Heat termination thermostat open
Low line voltage
Compressor hums, but does not Single phasing
start
Shorted or grounded motor windings
Compressor seized
Turn on
Check
Check
4.2.2
Check
Replace
Check
Check
6.16
6.11
6.8
5.7
Replace
Check
Check
6.8
6.8
5.2 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING
Container
Refrigeration System
Hot load (Failure to Pre--cool)
Defective box insulation or air leak
Shortage of refrigerant
Evaporator coil covered with ice
Evaporator coil plugged with debris
Evaporator fan(s) rotating backwards
Defective evaporator fan motor/capacitor
Air bypass around evaporator coil
Controller set too low
Compressor service valves or liquid line shutoff valve partially closed
Dirty condenser
Compressor worn
Current limit (function code Cd32) set to wrong value
Suction modulation valve malfunction
5-1
Normal
Repair
6.7.1
5.6
6.15
6.15/6.16
6.17
Check
Reset
Open valves
completely
6.10
6.8
3.3.5
6.18
T-317
CONDITION
POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING
Compressor
Refrigeration System
Compressor valves defective
Abnormal pressures
Controller malfunction
Evaporator fan or motor defective
Suction modulation valve malfunction
Condenser Pressure Transducer defective
Shortage of refrigerant
6.8
5.7
5.9
6.16
6.18
Check
6.7.1
5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING
No operation of any kind
No control power
Unit will not heat or has insufficient heat
Start-Stop switch OFF or defective
Circuit breaker OFF or defective
External power source OFF
Circuit breaker or fuse defective
Control Transformer defective
Evaporator fan internal motor protector open
Heat relay defective
Heater termination switch open
Heater(s) defective
Heater contactor or coil defective
Evaporator fan motor(s) defective or rotating backwards
Evaporator fan motor contactor defective
Controller malfunction
Defective wiring
Loose terminal connections
Low line voltage
Check
Check
Turn ON
Replace
Replace
6.16
Check
6.15
6.15
Replace
6.15/6.16
Replace
5.9
Replace
Tighten
2.3
5.5 UNIT WILL NOT TERMINATE HEATING
Unit fails to stop heating
Controller improperly set
Controller malfunction
Heater termination thermostat remains closed along with
the heat relay
Reset
5.9
6.15
5.6 UNIT WILL NOT DEFROST PROPERLY
Defrost timer malfunction (Cd27)
Loose terminal connections
Defective wiring
Defrost temperature sensor defective or heat termination
thermostat open
Table 3-5
Tighten/
Replace
Will not initiate defrost
manually
Heater contactor or coil defective
Manual defrost switch defective
Defrost temperature sensor open
Replace
Replace
4.10.4
Initiates but relay (DR) drops
out
Low line voltage
2.3
Initiates but does not defrost
Heater contactor or coil defective
Heater(s) burned out
Replace
6.15
Will not initiate defrost
automatically
T-317
5-2
Replace
CONDITION
POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
5.6 UNIT WILL NOT DEFROST PROPERLY --Continued
Frequent defrost
Wet load
Normal
5.7 ABNORMAL PRESSURES (COOLING)
Condenser coil dirty
Condenser fan rotating backwards
Condenser fan inoperative
Refrigerant overcharge or noncondensibles
High discharge pressure
Discharge pressure regulator valve defective
Discharge service valve partially closed
Suction modulation valve malfunction
Suction service valve partially closed
Filter-drier partially plugged
Low refrigerant charge
Expansion valve defective
No evaporator air flow or restricted air flow
Low suction pressure
Excessive frost on evaporator coil
Evaporator fan(s) rotating backwards
Discharge pressure regulator valve defective
Suction modulation valve malfunction
Heat exchanger defective
Suction and discharge pressures tend to equalize when unit Compressor valves defective
is operating
Compressor cycling/stopped
6.10
6.11
6.11
6.7.1
Replace
Open
6.18
Open
6.13
6.7.1
6.14
6.15
5.6
6.16.3
Replace
6.18
Replace
6.8
Check
5.8 ABNORMAL NOISE OR VIBRATIONS
Compressor
Condenser or Evaporator Fan
Loose mounting bolts
Worn bearings
Worn or broken valves
Liquid slugging
Insufficient oil
Bent, loose or striking venturi
Worn motor bearings
Bent motor shaft
Tighten
6.8
6.8
6.14
6.8.6
Check
6.11/6.16
6.11/6.16
5.9 CONTROLLER MALFUNCTION
Will not control
Defective Sensor
Defective wiring
Fuse (F1, F2) blown
Stepper motor suction modulation valve circuit malfunction
5-3
6.23
Check
Replace
6.18
T-317
CONDITION
POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW
Evaporator coil blocked
No or partial evaporator air flow
Frost on coil
Dirty coil
Evaporator fan motor internal protector open
Evaporator fan motor(s) defective
Evaporator fan(s) loose or defective
Evaporator fan contactor defective
5.6
6.15
6.16
6.16
6.16
Replace
5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION
Low suction pressure with high
superheat
High suction pressure with low
superheat
Liquid slugging in compressor
Fluctuating suction pressure
Low refrigerant charge
External equalizer line plugged
Wax, oil or dirt plugging valve or orifice Ice formation at
valve seat
Superheat too high
Power assembly failure
Loss of element/bulb charge
Broken capillary
Foreign material in valve
Superheat setting too low
External equalizer line plugged Ice holding valve open
Foreign material in valve
Pin and seat of expansion valve eroded or held open by
foreign material
Improper bulb location or installation
Low superheat setting
6.7.1
Open
6.14
6.7.1
6.14
6.14
Open
6.14
6.14
5.12 AUTOTRANSFORMER MALFUNCTION
Unit will not start
Circuit breaker (CB-1 or CB-2) tripped
Autotransformer defective
Power source not turned ON
460 VAC power plug is not inserted into the receptacle
Check
6.19
Check
4.2.2
5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH
High discharge pressure
Condenser fan starts and stops
T-317
Dirty coil
Noncondensibles
Water pressure switch malfunction
Water supply interruption
5-4
6.12
Check
Check
SECTION 6
SERVICE
NOTE
To avoid damage to the earth’s ozone layer, use
a refrigerant recovery system whenever removing refrigerant. When working with refrigerants
you must comply with all local government environmental laws. In the U.S.A., refer to EPA section 608.
4. Install the u-shaped block and nut onto the base of
the piercing valve that was removed in step 2.
5. Tighten the valve to the process tube by turning the
nut enough to seal the gasket and to secure the
valve to the process tube.
6. Do NOT overtighten. Overtightened valves can
actually cause a leak.
6.1 REPAIRING THE REFRIGERATION SYSTEM
7. Install the manifold gauge hose (refer to section 6.3)
to the one-quarter inch connector using a low or
high side R-134a connector or a low or high side
swivel elbow.
The unit is designed as a hermetic system, which
reduces the number of potential leak-points for
refrigerant. Therefore the suction service, discharge
service and manual liquid line valves have been
eliminated in comparison to the standard container unit.
In conjunction, the sight glass on the water-cooled
condenser, and the filter-drier quick--connect nuts have
also been removed. These areas have either been
completely eliminated, or have been replaced with
brazed joints.
8. Turn the hand valve clockwise to pierce the tubing
and access the refrigeration system.
1
6
2
To perform maintenance on the system, two process
tubes have been provided, which are the liquid line and
suction line process tubes . Refer to Table 6-7 for a list
of the tools required to perform the tasks.
3
4
6.2 PIERCING VALVES
5
To gain access to the hermetic system, it is
recommended to use the Robinair P/N 40288 piercing
valve on the units process tubes.
1.Hand Valve
3.Piercing Needle
5.Nut
a. Preparation
2. Gasket
4. U-Shaped Block
6.1/4” S.A.E. Connector
Figure 6-1. Piercing Valve
1. Tubing should be straight and round.
c. Removal
2. Carefully clean the process tubing where the
piercing valve will be attached, do NOT scratch the
tubing.
1. Reverse the steps in section 6.2.b.
6.3 MANIFOLD GAUGE SET
3. Make sure there are no dents in the tubing.
The manifold gauge set can be used to determine
system operating pressure, add a refrigerant charge,
and to equalize or evacuate the system.
4. Apply a little clean refrigerant oil to the tubing where
the piercing valve will be placed.
b. Installing
Figure 6-2 shows hand valves, gauges and service
ports “A, C and B.” When the low pressure hand valve is
frontseated (turned all the way in), the low (suction)
pressure can be checked. When the high pressure hand
valve is frontseated, high (condensing) pressure can be
checked. When both valves are open (turned
counter-clockwise all the way out), high pressure vapor
will flow into the low side. When the low pressure valve is
open, the system can be charged. Oil can also be added
to the system.
1. Make sure the gasket (item 2, refer to Figure 6-1) is
in place, and the piercing needle (item 3) is backed
all the way out by turning the hand valve (item 1)
counter-clockwise.
2. Remove the nut (item 5) and u-shaped block (item
4) from the base of the piercing valve.
3. Straddle the process tube with the hand valve
portion of the piercing valve.
6-1
T--317
6.4 REFRIGERANT RECOVERY
Only a R-134a manifold gauge set with self-sealing
hoses, as shown in Figure 6-3 (CTD P/N 07-00294-00,
which includes items 1 through 6) can be used when
working on the models covered within this manual.
Low Pressure
Gauge
1. Disconnect the tube clamp connected to the baffle
plate on the liquid line process tube. Remove the
baffle plates covering both process tubes.
2. Install the piercing valve (refer to section 6.2) on the
liquid line process tube and the suction line process
tubes. The valve should be installed as close as
possible to the pinched-off end of the liquid line and
suction line process tubes. Make sure the tubing is a
full round diameter.
High Pressure
Gauge
Opened
(Backseated
Hand Valve )
A
C
B
3. Install the 3/8 to 1/4 inch adapter to the1/4 inch flare
fitting on the piercing valves. Connect the high side
and low side of the R-134a manifold gauge set to the
3/8 inch hose fittings.
Closed
(Frontseated
Hand Valve)
4. Connect the refrigerant recovery unit to the center
hose on the manifold gauge set. Close the piercing
valves, rotating the valve stems fully clockwise.
Following the instructions for your refrigerant
recovery unit start up and open the piercing valves
at the appropriate time by turning the valve stems
counter-clock wise.
A. Service Port to Low Side of System
B. Service Port to High Side of System
C. Service Port to Either: Refrigerant Cylinder, Oil
Container or Vacuum Pump
Figure 6-2. Manifold Gauge Set
5. When the refrigerant is fully recovered from the
system, remove the refrigerant recovery unit. Using
dry nitrogen break the vacuum and bring the system
pressure to a slightly positive pressure of 2 to 5 psig.
6. Remove any positive pressure from the system
through the manifold gauge set and leave the
piercing valve open and the gauge set center hose
open to prevent any pressure build-up in the
refrigeration system.
WARNING
Before proceeding with the repair make
certain that the stepper motor suction
modulation valve (SMV) is open (refer to
section 6.18) and that there is no positive
pressure in the system.
1
To Low Side
2
Blue Hose
4
3
6
Blue Knob
To High Side
2
3
7. To reduce the time required for evacuation,
dehydration and refrigerant charging of the system,
perform the following steps.
2
Red Hose
3
4
Yellow Hose
5
2
Red
Knob
1. Manifold Gauge Set
2. Hose Fitting (0.500-16 Acme)
3. Refrigeration or Evacuation Hoses
(SAE J2196/R-134a)
4 Hose Fitting w/O-ring (M14 x 1.5)
5. High Side Field Service Coupling
6. Low Side Field Service Coupling
Figure 6-3. Manifold Gauge Set Connection
T--317
6-2
S
Remove the piercing valves from the liquid
line and suction line process tubes.
S
Using the tubing cutter, cut the process tubes
below the pierced hole in liquid line and
suction line process tubes.
S
Place the 3/8 inch flare nuts on both process
tubes and flare the tube.
S
Connect the 3/8 inch to 1/4 inch flare adapter
and the 1/4 inch swivel elbow x R-134a
refrigerant adapter to the R-134a gauge set.
6.5 REFRIGERANT LEAK CHECKING
The refrigeration unit is now ready for repair, and/or
component replacement.
WARNING
8. Pressurize the system with nitrogen and R-134a,
and leak test the entire system.
Never use air or gases containing oxygen
for leak testing or operating refrigerant
compressors. Pressurized mixtures of air
or gases containing oxygen can lead to explosion.
9. Connect the vacuum pump to the center hose on
the manifold gauge set, and thoroughly evacuate
the system to 500 microns.
a. The recommended procedure for finding leaks in a
system is with a R-134a electronic leak detector.
Testing joints with soapsuds is satisfactory only for
locating large leaks.
b. If the system is without refrigerant, charge the system
with refrigerant 134a to build up pressure between 2.1
to 3.5 kg/cm@ (30 to 50 psig). Remove refrigerant cylinder and leak-check all connections.
10. Charge the system with the correct weight (refer to
unit model plate, see Figure 2-1 for location) of
refrigerant R-134a using an accurate weight scale.
11. Run test the unit.
When it is determined that the unit is performing
normally, the unit should be sealed to its original
hermetic state as explained below.
NOTE
Only refrigerant 134a should be used to pressurize the system. Any other gas or vapor will
contaminate the system, which will require
additional purging and evacuation of the system.
12. Use the process tube pinch-off tool to seal the tubes
before the 3/8 inch flare assembly (one tube at a
time, if necessary).
c. If required, remove refrigerant using a refrigerant
recovery system and repair any leaks.
d. Evacuate and dehydrate the unit. (Refer to paragraph
6.6.)
e. Charge unit per paragraph 6.7.
13. Vent the line to the gauge set and tighten. Check for
refrigerant leaks after the pinch-off tool, monitor the
gauge set for a pressure rise. If there is a pressure
rise, tighten the pinch-off tool until there is no
pressure rise at the gauge set.
6.6 EVACUATION AND DEHYDRATION
6.6.1 General
Moisture is the deadly enemy of refrigeration systems.
The presence of moisture in a refrigeration system can
have many undesirable effects. The most common are
copper plating, acid sludge formation, “freezing-up” of
metering devices by free water, and formation of acids,
resulting in metal corrosion.
6.6.2 Preparation
a. Evacuate and dehydrate only after pressure leak test.
(Refer to paragraph 6.5.)
b. Essential tools to properly evacuate and dehydrate
any system include a vacuum pump (8 m3/hr = 5 cfm
volume displacement) and an electronic vacuum
gauge. (The pump is available from Carrier Transicold, P/N 07-00176-11.)
c. If possible, keep the ambient temperature above
15.6_C (60_F) to speed evaporation of moisture. If
the ambient temperature is lower than 15.6_C
(60_F), ice might form before moisture removal is
complete. Heat lamps or alternate sources of heat
may be used to raise the system temperature.
d. Additional time may be saved during a complete system pump down by replacing the filter-drier with a
section of copper tubing and the appropriate fittings.
Installation of a new drier may be performed during
the charging procedure.
6.6.3 Procedure - Complete system
a. Remove all refrigerant using a refrigerant recovery
system.
14. Leave the pinch-off tool in place, and remove the
fittings from the liquid line or suction line process
tube.
WARNING
Do not remove the pinch-off tool from the
process tubes until the following
procedures are completed.
15. Using the tubing cutter, cut-off the excess tubing as
close to the pinch-off tool as possible.
16. Use an oxyacetylene torch to braze the exposed
end of the process tubes.
17. Remove the pinch-off tool and leak test the process
tubes at the brazed end.
18. Install both baffle plates, then connect the tube
clamp to the baffle plate on the liquid line process
tube.
6-3
T--317
b. The recommended method to evacuate and dehydrate the system is to connect three evacuation
hoses (see Figure 6-4) to the vacuum pump and
refrigeration unit. Be sure the service hoses are
suited for evacuation purposes.
d. On units equipped with a receiver, the level should be
between the glasses. On units equipped with a water
cooled condenser, the level should be at the center of
the glass. If the refrigerant level is not correct, continue with the following paragraphs to add or remove refrigerant as required.
6.7.2 Adding Refrigerant to System (Full Charge)
a. Evacuate unit and leave in deep vacuum. (Refer to
paragraph 6.6.)
b. Place cylinder of R-134a on scale and connect charging line from cylinder to liquid line process tube. Purge
charging line at liquid line valve and then note weight
of cylinder and refrigerant.
c. Open liquid valve on cylinder. Open liquid line valve
half-way and allow the liquid refrigerant to flow into
the unit until the correct weight of refrigerant (refer to
paragraph 2.2) has been added as indicated by
scales.
c. Test the evacuation setup for leaks by backseating
the unit service valves and drawing a deep vacuum
with the vacuum pump and gauge valves open. Shut
off the pump and check to see if the vacuum holds.
Repair leaks if necessary.
d. Midseat the refrigerant system service valves.
e. Open the vacuum pump and electronic vacuum
gauge valves, if they are not already open. Start the
vacuum pump. Evacuate unit until the electronic vacuum gauge indicates 2000 microns. Close the electronic vacuum gauge and vacuum pump valves. Shut
off the vacuum pump. Wait a few minutes to be sure
the vacuum holds.
f. Break the vacuum with clean dry refrigerant 134a
gas. Raise system pressure to approximately 0.2 kg/
cm@ (2 psig), monitoring it with the compound gauge.
g. Remove refrigerant using a refrigerant recovery system.
NOTE
It may be necessary to finish charging unit
through suction service valve in gas form, due
to pressure rise in high side of the system.
(Refer to section paragraph 6.7.3)
h. Repeat steps e.and f. one time.
i. Remove the copper tubing and change the filter-drier.
Evacuate unit to 500 microns. Close the electronic
vacuum gauge and vacuum pump valves. Shut off the
vacuum pump. Wait five minutes to see if vacuum
holds. This procedure checks for residual moisture
and/or leaks.
d. Backseat manual liquid line valve (to close off gauge
port). Close liquid valve on cylinder.
e. Start unit in cooling mode. Run approximately 10 minutes and check the refrigerant charge.
6.7.3 Adding Refrigerant to System (Partial
Charge)
a. Examine the unit refrigerant system for any evidence
of leaks. Repair as necessary. (Refer to paragraph
6.5.)
b. Maintain the conditions outlined in paragraph 6.7.1
c. Fully backseat the manifold gauge port
d. Connect charging line between the suction line process tube and the cylinder of refrigerant R-134a.
Open VAPOR valve.
e. Partially frontseat (turn clockwise) the manifold
gauge valve and slowly add charge until the refrigerant appears at the proper level .
6.7.4 Emergency Shipboard Refrigerant Charging
Procedure
j. With a vacuum still in the unit, the refrigerant charge
may be drawn into the system from a refrigerant container on weight scales. Continue to paragraph 6.7
6.7 REFRIGERANT CHARGE
6.7.1 Checking the Refrigerant Charge
NOTE
To avoid damage to the earth’s ozone layer, use
a refrigerant recovery system whenever removing refrigerant. When working with refrigerants
you must comply with all local government environmental laws. In the U.S.A., refer to EPA section 608.
If the unit is not maintaining set point, refer to section 5
for possible causes. If the unit is then determined to be
low on refrigerant charge, follow the steps below.
a. Connect the gauge manifold to the line piercing
valves. For units operating on a water cooled condenser, change over to air cooled operation.
b. Bring the container temperature to approximately
1.7_C (35_F) or --17.8_C (0_F). Then set the controller set point to --25_C (--13_F) to ensure that the suction modulation valve is at maximum allowed open
position.
a. Perform step 6.7.1.a.
b. If the unit is operating on water-cooled condenser
switch to air-cooled condenser operation.
c. Partially block the condenser coil inlet air. Increase
the area blocked until the compressor discharge
pressure is raised to approximately 12 kg/cm@ (175
psig).
T--317
c.
6-4
If set point is in a perishable range, temporarily
lower the unit set point to ensure that the SMV is
fully open for this procedure.
normal operating system pressures, then the
charge should be correct.
CAUTION
f.
Make sure supply air temperature does not
go below the original set point for more
than five minutes, or damage to the load
may occur.
If the discharge pressure is more than ten psig
below the curve, add three pounds of R-134a
refrigerant through the suction line process tube.
g. Return set point to previous temperature setting.
h. The unit should be operating normally. Return to
water-cooled operation, if necessary.
d. Refer to the pressure temperature curves in
Figure 6-31.
e. If the discharge/suction pressures are within the
i.
Leave piercing valves in place for Port repair.
j.
Tag the unit for Port/Maintenance repair.
1. Refrigerant
Recovery Unit
2. Refrigerant Cylinder
3. Evacuation Manifold
(R-134a)
4. Hand Valve
5. Vacuum Pump
6. Electronic Vacuum
Gauge
7. Condenser Coil
8. Compressor
9. Evaporator Coil
10. Liquid Line Process
Tube
11. Suction Line
Process Tube
9
7
8
10
11
1
2
4
4
3
6
4
5
Figure 6-4. Vacuum Pump Connections
6-5
T--317
6.8 COMPRESSOR
1
14
Make sure power to the unit is OFF and
power plug disconnected before replacing
the compressor.
13
The compressor should not operate in a
vacuum greater than 500 mm/hg (20
inches/hg).
The service replacement compressor is
sold without shutoff valves (but with valve
pads), and without terminal box and cover.
Customer should retain the original
terminal box, cover, and high pressure
switch for use on replacement compressor.
3
Check oil level in service replacement
compressor. (Refer to paragraph 6.8.6.)
4
A compressor terminal wiring kit must be
ordered as a separate item when ordering
replacement compressor. Appropriate
installation instructions are included with
kit.
5
6
5
11
10
6
9
8
7
1. Discharge Flange
2. High Side Pressure
Connection
3. Low Side Pressure
Connection
4. Suction Flange
5. Motor End Cover
6. Serial/Model No. Plate
7. Crankcase Heater
8.
9.
10.
11.
12.
13.
14.
15.
Bottom Plate
Sight Glass
Oil Drain Plug
Bearing Head
Oil Pump
Oil Fill Plug
Cylinder Head
Valve Plate
Figure 6-5 Compressor
h. Remove compressor mounting bolts from mounting
plate and install mounting plate on replacement compressor.
Refer to Table 6-6 and Table 6-8 for
applicable compressor wear limits and
torque values.
i. Install replacement compressor terminal wiring kit,
following instructions included with kit.
Refer to Figure 6-31 for charts on
compressor pressure, temperature and
motor current curves.
k. Install compressor and mounting plate in unit.
j. Install high pressure switch on compressor.
l. Connect junction box(es) to compressor and connect
all wiring per wiring diagram. Install junction box
cover(s).
6.8.1 Removal and Replacement of Compressor
m. Install mounting bolts in service valves and torque to
2.77 to 4.15 mkg (20-30 ft/lb).
a. Remove the protective guard from lower section of
the unit.
n. Install a new filter-drier.Install a new filter-drier.
o. Attach manifold gauge set (with hand valves near
vacuum pump) to the liquid line and suction line process tubes. Dehydrate and evacuate compressor to
500 microns (75.9 cm Hg vacuum = 29.90 inches Hg
vacuum). Turn off valves on both hoses to pump.
b. Remove all refrigerant using a refrigerant recovery
system.(refer to section 6.4)
c. Locate the compressor junction box. Tag and disconnect wiring from compressor terminals and remove
compressor junction box.
p. Fully backseat (open) both hand valves of manifold
gauge set.
d. Loosen service valve mounting bolts, break seal and
then remove bolts.
q. Remove vacuum pump lines.
e. Remove compressor plate mounting bolts.
r. Start unit and check refrigerant charge. (Refer to
paragraph 6.7.)
f. Remove compressor and mounting plate. Refer to
paragraph 2.2 for weight of compressor.
s. Check moisture-liquid indicator for wetness. Change
filter-drier if necessary. (Refer to paragraph 6.13.)
g. Remove high pressure switch (HPS) from compressor and check operation of switch (refer to paragraph
6.9.2).
T--317
4
12
NOTES
2
3
15
WARNING
1
2
t. Check compressor oil level per paragraph 6.8.6. Add
oil if necessary.
6-6
6.8.2 Compressor Disassembly
2
3
WARNING
1
Before disassembly of any external compressor component make sure to relieve
possible internal pressure by loosening the
bolts and tapping the component with a
soft hammer to break the seal.
5
4
1. Oil Pressure Relief
Valve
2. Oil Return Check
Valve
CAUTION
Removing the compressor motor press-fit
stator in the field is not recommended. The
rotor and stator are a matched pair and
should not be separated.
Figure 6-7 Bottom Plate Removed
b. Loosen cylinder head capscrews. If the cylinder head
is stuck, tap the center of the cylinder head with a
wooden or lead mallet. Do not strike the side of the
cylinder head. Be careful not to drop the head or damage the gasket sealing surface. Remove cylinder
head bolts and gasket (see Figure 6-6).
c. Remove valve stops and valves. After they have been
removed, free the valve plate from the cylinder deck
by using the outside discharge valve hold-down capscrew as a jack screw through the tapped hole of the
valve plate. Remove the valve plate gasket.
d. Turn the compressor on its side and remove the bottom plate oil suction screen and screen hold down
plate. Inspect the screen for holes or an accumulation
of dirt. The screen can be cleaned with a suitable solvent.
e. Match mark each connecting rod cap (see Figure 6-7)
and connecting rod for correct reassembly. Remove
the bolts and connecting rod caps. Push the piston
rods up as far as they will go without having the piston
rings extend above the cylinders.
When disassembling compressor, matchmark parts so
they may be replaced in their same relative positions.
(See Figure 6-5.) Refer to Table 6-6 and Table 6-8 for
compressor wear limits and bolt torque values.
a. Place the compressor in a position where it will be
convenient to drain the oil. Remove the oil fill plug
(see Figure 6-5) to vent the crankcase. Loosen the
drain plug in bottom plate and allow the oil to drain out
slowly. Remove the plug slowly to relieve any crankcase pressure. Some units have a plug in the bottom
center of the crankcase which may be removed for
draining the motor end more quickly.
1
2
3
4
5
3. Oil Suction Tube
4. Capscrew
5. Connecting Rod and
Cap Assembly
7
CAUTION
The copper tube which connects to the oil
suction strainer extends out the bottom
with the bottom plate removed. Take precautions to avoid bending or breaking it
while changing crankcase positions.
JACK HERE
6
1. Cylinder Head Gasket
2. Discharge Valve
Screw & Lockwasher
3. Discharge Valve Stop
4.
5.
6.
7.
Discharge Valve
Valve Plate
Valve Plate Assembly
Valve Plate Gasket
f. If necessary, remove the oil return check valve. (See
Figure 6-7.) Inspect it for proper operation (flow in
one direction only). Replace the assembly with a new
unit if check valve operation is impaired.
g. To remove the oil pump (see Figure 6-8) remove eight
capscrews, oil pump bearing head assembly, gasket
and thrust washer.
Figure 6-6 Exploded View of Valve Plate
6-7
T--317
h. Be very careful not to damage the motor windings
when removing the motor end cover (see
Figure 6-10), as the cover fits over the winding coils.
Loosen the cap screws, break the seal and then remove all capscrews except one in the top of the cover.
While holding the cover in place, remove the remaining capscrew. Do not allow the cover to drop from its
own weight. To prevent striking the winding, remove
the cover horizontally and in line with the motor axis.
Set screw must be removed.
1
6
5
4
1. Oil Pump & Bearing
Head
2. Thrust Washer
4
2
7
5
3
3
3. Oil Pickup Tube
4. Oil Inlet Port
5. Oil Pump Inlet
2
1
Figure 6-8 Oil Pump and Bearing Head
NOTE
If the oil pump was not operating properly, the
entire oil pump & bearing head assembly must
be replaced. Individual parts are not available. If
the pump requires inspection or cleaning, disassemble and reassemble by referring to
Figure 6-9 . Clean all parts and coat all moving
parts with compressor oil before proceeding
with reassembly.
1. Strainer Screws and
Washers
2. Suction Strainer
3. Motor End Cover
Gasket
1
2
3
4
5
7
11
8
1.
2.
3.
4.
5.
6.
Capscrews
Cover
Reversing Assembly
Pinion
Gear
Drive
10
9
7. O-Ring
8. Oil Pump & Bearing
9. Set Screw
10. Relief Valve
11. Pin
12. Gasket
Figure 6-9 Low Profile Oil Pump
T--317
Motor End Cover
Valve Gasket
Suction Service Valve
Valve Capscrew
Figure 6-10 Motor End Cover
i. Remove the refrigerant suction strainer. If it is
removed with ease it may be cleaned with solvent and
replaced. If the strainer is broken, corroded or
clogged with dirt that is not easily removed, replace
the strainer. Install new gaskets upon reassembly.
j. Block the compressor crankshaft so that it cannot
turn. Use a screwdriver to bend back the tabs on the
lockwasher and remove the equalizer tube and lock
screw assembly. (See Figure 6-11.) The slingers at
the end of the tube draw vapor from the crankcase.
Remove the rotor using a jack bolt. Insert a brass plug
into the rotor hole to prevent damage to the end of the
crankshaft.
k. If the piston rings extend beyond the cylinder tops, the
pistons can be pulled through the bottom plate opening after the piston rings are compressed. A piston
ring compresser will facilitate removal. Each piston
pin is locked in place by lock rings which are snapped
into grooves in the piston wall. See Figure 6-12
l. Since the stator cannot be replaced in the field, the
terminal plate assembly need not be disturbed unless
a leak exists and the plate assembly needs to be replaced. If no terminal plate repair is required, proceed
with reassembly.
12
6
4.
5.
6.
7.
6-8
1
2
1
3
2
3
1. Equalizer Tube and
Lock Screw Assembly
2. Lockwasher
3. Counterweight -Motor End
1. Suction Valve
2. Suction Valve
Positioning Spring
Figure 6-11 Equalizing Tube and Lock Screw
Assembly
6
9
Figure 6-13 Suction Valve & Positioning Springs
Suction valves are positioned by dowel pins (see Figure
Figure 6-13). Do not omit the suction valve positioning
springs. Place the springs so that the ends bear against
the cylinder deck (middle bowed away from cylinder
deck). Use new gaskets when reinstalling valve plates
and cylinder heads.
5
7
3. Valve Plate Dowel
Pin
b. Compression Rings
8
The compression ring is chamfered on the inside
circumference. This ring is installed with the chamfer
toward the top. Stagger the ring end gaps so they are
not aligned.
4
3
2
10
1
1.
2.
3.
4.
5.
Capscrew
Cap
Crankshaft
Thrust Washer
Rotor Drive Key
6.
7.
8.
9.
10.
Connecting Rod
Compression Ring
Piston
Pin
Retainer
Figure 6-14 Piston Ring
The gap between the ends of the piston rings can be
checked with a feeler gauge by inserting the ring into the
piston bore approximately one inch below the top of the
bore. Square the ring in the bore by pushing it slightly
with a piston. The maximum and minimum allowable
ring gaps are 0.33 and 0.127 mm (0.013 and 0.005 inch)
respectively.
Figure 6-12 Crankshaft Assembly
6.8.3 Compressor Reassembly
Clean all compressor parts, use a suitable solvent with
proper precautions. Coat all moving parts with the
proper compressor oil before assembly. Refer to
Table 6-8 for applicable compressor torque values.
6.8.5 Installing the Components
a. Push pistons from the inside of the crankcase through
the cylinders, being careful not to break the rings.
Place rods so that the chamfered side will be against
radius of crankpins. Install the crankshaft and thrust
washer through the pump end of the compressor. Ensure thrust washer is fitted on locating pin. Do not
damage main bearings. Bring rods in position against
crank bearings.
6.8.4 Preparation
a. Suction and Discharge Valves
If the valve seats look damaged or worn, replace valve
plate assembly. Always use new valves because it is
difficult to reinstall used valves so that they will seat as
before removal. Any valve wear will cause leakage.
6-9
T--317
b. Install the pump end thrust washer on the two dowel
pins located on the bearing head. (See Figure 6-8.)
3. Turn unit off to check the oil level. The correct oil level
range should be between the bottom to one-eighth
level of the sight glass. If the level is above oneeighth, oil must be removed from the compressor. To
remove oil from the compressor, follow step d in this
section. If the level is below the bottom of the sight
glass, add oil to the compressor following step b
below.
CAUTION
Ensure that thrust washer does not fall off
dowel pins while installing oil pump.
b. Adding Oil with Compressor in System
In an emergency where an oil pump is not available, oil
may be drawn into the compressor through the liquid
line process tube.
CAUTION
The set screw on the crankshaft must be
removed for this type of oil pump.
CAUTION
c. Install the bearing head assembly with a new gasket
on the compressor crankshaft. Carefully push oil
pump on by hand, ensuring that the thrust washer remains on the dowel pins. The tang on the end of the
drive engages the slot in the crankshaft, and the oil
inlet port on the pump is aligned with the oil pickup
tube in the crankcase. The pump should mount flush
with the crankcase and should be oriented with the oil
pick up tube and oil inlet port aligned as shown in
Figure 6-8.
Extreme care must be taken to ensure the
manifold common connection remains
immersed in oil at all times. Otherwise air
and moisture will be drawn into the compressor.
Connect the suction connection of the gauge manifold to
the compressor liquid line process tube and immerse
the common connection of the gauge manifold in an
open container of refrigeration oil. Crack the manifold
gauge valve to vent a small amount of refrigerant
through the common connection and the oil to purge the
lines of air. Close the gauge manifold valve.
d. Align the gasket and install the eight capscrews in the
mounting flange. Refer to Table 6-8 for applicable
torque values.
e. Install matching connecting rod caps Be sure rod is
not bound and crankshaft will turn correctly as each
set of rod bolts is torqued.
With the unit running, SLOWLY frontseat the manifold
liquid hand valve and induce a vacuum in the
compressor crankcase. Oil will flow through the liquid
line process tube into the compressor. Add oil as
necessary.
f. Be sure key fits properly when installng rotor on shaft
Screw on equalizer tube and lock screw assembly
with lock washer and bend over tabs of lock washer.
Assemble suction strainer to motor and cover and
bolt cover to crankcase. Assemble valve plates and
gaskets. Assemble cylinder heads and gaskets. Turn
the shaft by hand to see that it moves freely.
Run unit for 20 minutes in cooling mode. Check oil level
at the compressor sight glass.
g. Install the oil suction screen, the oil suction screen
hold down plate and the bottom plate.
c. Adding Oil to Service Replacement Compressor
6.8.6 Compressor Oil Level
NOTES
The correct oil charge is 3.6 liters (7.6 U.S.
pints).
CAUTION
Service replacement compressors are shipped
without oil.
Use only Carrier Transicold approved
Polyol Ester Oil (POE) -- Castrol-Icematic
SW20 compressor oil with R-134a. Buy in
quantities of one quart or smaller. When
using this hygroscopic oil, immediately
reseal. Do not leave container of oil open or
contamination will occur.
When first adding oil to the compressor, add
only three liters (6.3 pints) to the compressor.
Run the unit for 20 minutes in cooling mode.
Check the oil level in the compressor sight
glass. Add oil as necessary. This procedure is
designed to compensate for excess oil that may
have migrated with refrigerant to other parts of
the system during unit operation.
a. Checking the Oil Level in the Compressor.
1. Operate the unit in cooling mode for at least 20 minutes.
2. Check the front oil sight glass on the compressor to
ensure that no foaming of the oil is present after 20
minutes of operation. If the oil is foaming excessively
after 20 minutes of operation, check the refrigerant
system for flood-back of liquid refrigerant. Correct
this situation before performing the following step.
T--317
If compressor is without oil:
If oil is present in the compressor, ensure that it is the
correct oil. Add oil through the oil fill plug. Some
compressors have the oil plug located on the crankcase,
at the right or left side of the oil pump.
6-10
d. Removing Oil from the Compressor
1
1. If the oil level recorded in step a.3 is above one-eighth
level of the capacity of the sight glass, oil must be
removed from the compressor.
2
2. Close (frontseat) the manifold liquid hand valve and
pump unit down to 1.2 to 1.3 kg/cm@ (2 to 4 psig).
Frontseat the manifold vapor hand valve and slowly
bleed remaining refrigerant.
3
3. Remove the oil drain plug on the bottom plate of the
compressor and drain the proper amount of oil from
the compressor to obtain the correct level (maximum
is one-eight level of the sight glass). Replace the plug
securely back into the compressor.
4
5
6
1. Cylinder Valve
and Gauge
2. Pressure Regulator
3. Nitrogen Cylinder
4. Pressure Gauge
(0 to 36 kg/cm@ =
0 to 400 psig)
5. Bleed-Off Valve
6. 1/4 inch Connection
Figure 6-15 High Pressure Switch Testing
d. Set nitrogen pressure regulator at 26.4 kg/cm@ (375
psig) with bleed-off valve closed.
e. Close valve on cylinder and open bleed-off valve.
f. Open cylinder valve. Slowly close bleed-off valve to
increase pressure on switch. The switch should open
at a static pressure up to 25 kg/cm@ (350 psig). If a
light is used, light will go out. If an ohmmeter is used,
the meter will indicate open circuit.
g. Slowly open bleed-off valve to decrease the pressure. The switch should close at 18 kg/cm@ (250
psig).
4. Repeat step (a) to ensure proper oil level.
5. Return the system to its hermetic state by referring to
section 6.4.
6.9 HIGH PRESSURE SWITCH
6.9.1 Replacing High Pressure Switch
a. Turn unit start-stop switch OFF. Remove the refrigerant from the system.
6.10 CONDENSER COIL
b. Disconnect wiring from defective switch. The high
pressure switch is located on the center head and is
removed by turning counterclockwise. (See
Figure 2-3.)
The condenser consists of a series of parallel copper
tubes expanded into copper fins. The condenser coil
must be cleaned with fresh water or steam so the air flow
is not restricted. To replace the coil, do the following:
c. Install a new high pressure switch after verifying
switch settings. (Refer to paragraph 6.9.2.)
WARNING
d. Evacuate and dehydrate the compressor per paragraph 6.6.
Do not open the condenser fan grille before
turning power OFF and disconnecting
power plug.
6.9.2 Checking High Pressure Switch
a. Using a refrigerant reclaim system, remove the refrigerant charge.
b. Remove the condenser coil guard.
WARNING
c. Unsolder discharge line and remove the line to the
receiver or water-cooled condenser.
d. Remove coil mounting hardware and remove the coil.
Do not use a nitrogen cylinder without a
pressure regulator. Do not use oxygen in or
near a refrigeration system as an explosion
may occur.
e. Install replacement coil and solder connections.
f. Leak-check the coil connections per paragraph paragraph 6.5. Evacuate the unit per paragraph 6.6 then
charge the unit with refrigerant per paragraph 6.7.
NOTE
The high pressure switch is non-adjustable.
6.11 CONDENSER FAN AND MOTOR ASSEMBLY
WARNING
a. Remove switch as outlined in paragraph 6.9.1
b. Connect ohmmeter or continuity light across switch
terminals. Ohm meter will indicate no resistance or
continuity light will be illuminated if the switch closed
after relieving compressor pressure.
Do not open condenser fan grille before
turning power OFF and disconnecting
power plug.
c. Connect hose to a cylinder of dry nitrogen. (See
Figure 6-15.)
The condenser fan rotates counter-clockwise (viewed
from front of unit), pulls air through the the condenser
6-11
T--317
cap on water-cooled condenser inlet tube (replaces
tubing flare nut). De-scale tubing if necessary.
coil, and discharges horizontally through the front of the
unit. To replace motor assembly:
a. Open condenser fan screen guard.
What You Will Need:
b. Loosen two square head set screws on fan. (Thread
sealer has been applied to set screws at installation.)
Disconnect wiring from motor junction box.
1. Oakite composition No. 22, available as a powder in
68 kg (150 lb) and 136 kg (300 lb) containers.
2. Oakite composition No. 32, available as a liquid in
cases, each containing 3.785 liters (4 U.S. gallon)
bottles and also in carboys of 52.6 kg (116 lbs) net.
CAUTION
3. Fresh clean water.
Take necessary steps (place plywood over
coil or use sling on motor) to prevent motor
from falling into condenser coil.
4. Acid proof pump and containers or bottles with rubber hose.
NOTE
When Oakite compound No. 32 is being used
for the first time, the local Oakite Technical Service representative should be called in for their
suggestions in planning the procedure. They
will advise the reader on how to do the work with
a minimum dismantling of equipment: how to
estimate the time and amount of compound
required; how to prepare the solution; how to
control and conclude the de-scaling operation
by rinsing and neutralizing equipment before
putting it back into service. Their knowledge of
metals, types of scale, water conditions and descaling techniques will be highly useful .
c. Remove motor mounting hardware and replace the
motor. It is recommended that new locknuts be used
when replacing motor. Connect wiring per wiring diagram.
d. Install fan loosely on motor shaft (hub side in). DO
NOT USE FORCE. If necessary, tap the hub only, not
the hub nuts or bolts. Install venturi. Apply “Loctite H”
to fan set screws. Adjust fan within venturi so that the
outer edge of the fan projects 3.2 to 6.4 mm (3/16”
¦1/16”) back from edge of the venturi. Spin fan by
hand to check clearance.
e. Close and secure condenser fan screen guard.
f. Apply power to unit and check fan rotation. If fan
motor rotates backward, reverse wire numbers 5 and
8.
Summary of Procedure:
6.12 WATER COOLED CONDENSER CLEANING
a. Drain water from condenser tubing circuit. Clean
water tubes with Oakite No. 22 to remove mud and
slime.
The water-cooled condenser is of the shell and coil type
with water circulating through the cupro-nickel coil. The
refrigerant vapor is admitted to the shell side and is
condensed on the outer surface of the coil.
b. Flush.
c. De-scale water tubes with Oakite No. 32 to remove
scale.
Rust, scale and slime on the water-cooling surfaces
inside of the coil interfere with the transfer of heat,
reduce system capacity, cause higher head pressures
and increase the load on the system.
d. Flush.
e. Neutralize.
By checking the leaving water temperature and the
actual condensing temperature, it can be determined if
the condenser coil is becoming dirty. A larger than
normal difference between leaving condensing water
temperature and actual condensing temperature,
coupled with a small difference in temperature of
entering and leaving condensing water, is an indication
of a dirty condensing coil.
f. Flush.
g. Put unit back in service under normal load and check
head (discharge) pressure.
Detailed Procedure:
1. Drain and flush the water circuit of the condenser
coil. If scale on the tube inner surfaces is accompanied by slime, a thorough cleaning is necessary
before de-scaling process can be accomplished.
To find the approximate condensing temperature, with
the unit running in the cooling mode, install a gauge 0 to
36.2 kg/cm@ (0 to 500 psig) on the compressor
discharge service valve.
2. To remove slime or mud, use Oakite composition No.
22. Mixed 170 grams (6 ounces) per 3.785 liters (1
U.S. gallon) of water. Warm this solution and circulate through the tubes until all slime and mud has
been removed.
Example: Discharge pressure is 10.3 kg/cm@ (146.4
psig). Referring to Table 6-9 (R-134a pressure/
temperature chart), the 10.3 kg/cm@ (146.4 psig) value
converts to 43_C (110_F).
3. After cleaning, flush tubes thoroughly with fresh
clean water.
If the water-cooled condenser is dirty, it may be cleaned
and de-scaled by the following procedure:
4. Prepare a 15% by volume solution for de-scaling, by
diluting Oakite compound No. 32 with water. This is
accomplished by slowly adding 0.47 liter (1 U.S. pint)
of the acid (Oakite No. 32) to 2.8 liters (3 U.S. quarts)
of water.
a. Turn unit off and disconnect main power.
b. Disconnect water pressure switch tubing by loosening the two flare nuts. Install one-quarter inch flare
T--317
6-12
9 Following the water flush, circulate a 56.7 gram (2
ounce) per 3.785 liter (1 U.S. gallon) solution of
Oakite No. 22 thru the tubes to neutralize. Drain this
solution.
10 Flush the tubes thoroughly with fresh water.
WARNING
Oakite No. 32 is an acid. Be sure that the
acid is slowly added to the water. DO NOT
PUT WATER INTO ACID -- this will cause
spattering and excessive heat.
NOTE
If the condenser cooling water is not being used
as drinking water or is not re-circulated in a
closed or tower system, neutralizing is not necessary.
WARNING
Wear rubber gloves and wash the solution
from the skin immediately if accidental contact occurs. Do not allow the solution to
splash onto concrete.
11 Put the unit back in service and operate under normal load. Check the head pressure. If normal, a thorough de-scaling has been achieved.
What You Can Do For Further Help:
5. Fill the tubes with this solution by filling from the bottom. See Figure 6-16. Important: be sure to provide
a vent at the top for escaping gas.
Contact the Engineering and Service Department of the
OAKITE PRODUCTS CO., 19 Rector Street, New York,
NY 10006 U.S.A. for the name and address of the
service representative in your area.
Centrifugal pump
30 GPM at 35’ head
Priming
connection
Pump
Vent
Globe
valves
Fill condenser with cleaning solution. Do not add
solution more rapidly than
vent can exhaust gases
caused by chemical
action.
Close vent pipe
valve when pump
is running.
Suction
1” Pipe
Condenser
Tank
5’ Approximate
Remove water
regulating valve
Return
Pump
support
Vent
pipe
Fine mesh
screen
3’ to 4’
Figure 6-16 Water-Cooled Condenser Cleaning -Forced Circulation
Condenser
6 Allow the Oakite No. 32 solution to soak in the tube
coils for several hours, periodically pump-circulating
it with an acid-proof pump.
Figure 6-17 Water Cooled Condenser Cleaning Gravity Circulation
An alternate method may be used whereby a pail
(see Figure 6-17) filled with the solution and
attached to the coils by a hose can serve the same
purpose by filling and draining. The solution must
contact the scale at every point for thorough de-scaling. Air pockets in the solution should be avoided by
regularly opening the vent to release gas. Keep
flames away from the vent gases.
6.13 FILTER-DRIER
On units equipped with a water-cooled condenser, if the
sight glass appears to be flashing or bubbles are
constantly moving through the sight glass when the
suction modulation valve is fully open, the unit may have
a low refrigerant charge or the filter-drier could be
partially plugged.
a. To Check Filter-Drier
1. Test for a restricted or plugged filter-drier by feeling
the liquid line inlet and outlet connections of the drier
cartridge. If the outlet side feels cooler than the inlet
side, then the filter-drier should be changed.
2. Check the moisture-liquid indicator if the indicator
shows a high level of moisture, the filter-drier should
be replaced.
b. To Replace Filter-Drier
7 The time required for de-scaling will vary, depending
upon the extent of the deposits. One way to determine when de-scaling has been completed is to
titrate the solution periodically, using titrating equipment provided free by the Oakite Technical Service
representative. As scale is being dissolved, titrate
readings will indicate that the Oakite No. 32 solution
is losing strength. When the reading remains
constant for a reasonable time, this is an indication
that scale has been dissolved.
8 When de-scaling is complete, drain the solution and
flush thoroughly with water.
6-13
T--317
1. Pump down the unit and replace filter-drier.
2. Evacuate the system in accordance with paragraph
6.6.
3. After unit is in operation, inspect for moisture in system and check charge.
6.14.1 Checking Superheat.
NOTE
Proper superheat measurement should be
completed at --18_C (0_F) container box temperature where possible.
6.14 THERMOSTATIC EXPANSION VALVE
The thermal expansion valve (see Figure 2-2) is an
automatic device which maintains constant superheat
of the refrigerant gas leaving the evaporator, regardless
of suction pressure.
The valve functions are:
1. Automatic control of the refrigerant flow to match the
evaporator load.
2. Prevention of liquid refrigerant entering the compressor.
Unless the valve is defective, it seldom requires
maintenance other than periodic inspection to ensure
that the thermal bulb is tightly secured to the suction line
and wrapped with insulating compound. (See
Figure 6-18.) On units fitted with a semi--hermetic valve,
check to be sure the excess capillary is secured to the
power head assembly and wrapped with insulating
compound.
a. Open the heater access panel (see Figure 2-1) to expose the expansion valve .
b. Attach a temperature sensor near the expansion
valve bulb and insulate. Make sure the suction line is
clean and that firm contact is made with the sensor.
c. Connect an accurate gauge to the service port directly upstream of the suction modulating valve
d. Set the temperature set point to --18_C (0_F), and run
unit until conditions stabilize.
e. The readings may cycle from a high to a low reading.
Take readings of temperature and pressure every
three to five minutes for a total of 5or 6 readings
3
2
f. From the temperature/pressure chart (Table 6-9), determine the saturation temperature corresponding to
the evaporator outlet test pressures at the suction
modulation valve.
4
1
1.
2.
3.
4.
g. Subtract the saturation temperatures determined in
step f. from the temperatures measured in step e..
The difference is the superheat of the suction gas.
Determine the average superheat It should be 4.5 to
6.7 °C (8 to 12 °F)
Suction Line
TXV Bulb Clamp
Nut and Bolt
TXV Bulb
Figure 6-18 Thermostatic Expansion Valve Bulb
Braze Rod
(’Sil-Phos” = 5.5% Silver, 6% Phosphorus)
Copper Tube
(Apply heat for
10-15 seconds)
Bi-metallic Tube Connection
(Apply heat for 2-5 seconds)
Use of a wet cloth is not necessary due to rapid heat dissipation
of the bi--metallic connections
Figure 6-19 Hermetic Thermostatic Expansion Valve Brazing Procedure
T--317
6-14
6.14.2 Hermetic Valve Replacement
a. Removing the Expansion Valve
CAUTION
NOTES
If the thermostatic expansion valve is found
to be in need of replacement, then the
power head and cage assembly are to
replaced as a pair. They are a matched pair
and replacing one without the other will
affect the superheat setting.
1. The TXV is a hermetic valve and does not
have adjustable superheat.
2. All connections on the hermetic TXV are
bi--metallic, copper on the inside and
stainless on the outside.
1 Replace all gaskets, making sure to lightly coat with
oil. Insert cage and power assembly and bolts.
Tighten bolts equally. Fasten equalizer flare nut to
expansion valve.
2 Leak check the unit per paragraph 6.5. Evacuate
and dehydrate unit per section 6.6. Add refrigerant
charge per section 6.7.
3 Clean suction line with sandpaper before installing
bulb to ensure proper heat transfer. Strap thermal
bulb to suction line, making sure bulb is placed firmly
into the indentation of the suction line. See
Figure 6-18 for bulb placement.
4 Check superheat. (Refer to paragraph 6.14.2 step
6.14.1 ) Container box temperature should be at
--18°C (0°F).
3. All joints on the hermetic TXV (inlet, outlet
and equalizer lines) are brazed.
4. Bi--metallic connections heat up very
quickly.
1. Pump down the unit per paragraph 6.4.
2. Remove cushion clamps located on the inlet and outlet lines.
3. Unbraze the equalizer connection (1/4”), the outlet
connection (5/8”) and then the inlet connection
(3/8”). See Figure 6-19. Be careful to protect the insulation on the heaters and their wires.
4. Remove insulation (Presstite) from expansion valve
bulb.
5. Unstrap the bulb, located below the center of the
suction line (4 o’clock position), and remove the
valve.
6.15 EVAPORATOR COIL AND HEATER
ASSEMBLY
The evaporator section, including the coil, should be
cleaned regularly. The preferred cleaning fluid is fresh
water or steam. Another recommended cleaner is
Oakite 202 or similar, following manufacturer’s
instructions.
The two drain pan hoses are routed behind the
condenser fan motor and compressor. The drain pan
line(s) must be open to ensure adequate drainage.
6.15.1 Evaporator Coil Replacement
a. Pump unit down. (Refer to paragraph 6.4.)
b. With power OFF and power plug removed, remove
the screws securing the panel covering the evaporator section (upper panel).
c. Disconnect the defrost heater wiring.
d. Disconnect the defrost temperature sensor (see Figure Figure 2-2 from the coil. .
e. Remove middle coil support.
f. Remove the mounting hardware from the coil.
g. Unsolder the two coil connections, one at the distributor and the other at the coil header.
h. After defective coil is removed from unit, remove
defrost heaters and install on replacement coil.
i. Install coil assembly by reversing above steps.
j. Leak check connections per paragraph 6.5. Evacuate
the unit per paragraph 6.6 and add refrigerant charge
per paragraph 6.7.
6.15.2 Evaporator Heater Replacement
a.Before servicing unit, make sure the unit circuit breakers (CB-1 & CB-2) and the start-stop switch (ST) are
in the OFF position, and that the power plug and cable
are disconnected.
b. Remove the lower access panel (Figure 2-1) by
removing the T.I.R. locking device lockwire and
mounting screws.
b. Installing the Expansion Valve
1. Clean the suction line with sandpaper before installing bulb to ensure proper heat transfer. Apply thermal grease to the indentation in the suction line.
2. Strap the thermal bulb to the suction line, making
sure bulb is placed firmly into the suction line. See
Figure 6-18 for bulb placement.
3. Insulate the thermal bulb.
4. Braze inlet connection to inlet line, see Figure 6-19.
5. Braze outlet connection to outlet line.
6. Reinstall the cushion clamps on inlet and outlet lines.
7. Braze the equalizer connection to the equalizer line.
8. Check superheat (refer to step 6.14.1).
6.14.3 Semi--Hermetic Valve Replacement
a. Removing Expansion Valve
1 Pump down the unit per paragraph 6.4.
2 Remove insulation (Presstite) from expansion valve
bulb and power assembly and then remove thermal
bulb from the suction line (see Figure 6-18) .
3 Loosen flare nut and disconnect equalizing line from
expansion valve.
4 Remove capscrews and lift off power assembly and
remove cage assembly. Check for foreign material in
valve body.
5 The thermal bulb is located below the center of the
suction line (4 o’clock position). This area must be
clean to ensure positive bulb contact.
b. Installing Expansion Valve
6-15
T--317
c. Determine which heater(s) need replacing by checking resistance on each heater. Refer to paragraph 2.3
for heater resistance values
5
4
d. Remove hold-down clamp securing heaters to coil.
6
3
e. Lift the bent end of the heater (with the opposite end
down and away from coil). Move heater to the side
enough to clear the heater end support and remove.
2
5
1
6.16 EVAPORATOR FAN AND MOTOR ASSEMBLY
The evaporator fans circulate air throughout the
container by pulling air in the top of the unit. The air is
forced through the evaporator coil where it is either
heated or cooled and then discharged out the bottom of
the refrigeration unit into the container. The fan motor
bearings are factory lubricated and do not require
additional grease.
7
8
9
6.16.1 Replacing The Evaporator Fan Assembly
1.
2.
3.
4.
5.
WARNING
Always turn OFF the unit circuit breakers
(CB-1 & CB-2) and disconnect main power
supply before working on moving parts.
6.16.3 Assemble The Evaporator Fan Assembly
a. Assemble the motor and plastic spacer onto the stator.
b. Apply loctite to the 1/4-20 x 3/4 long bolts and torque
to 0.81 mkg (70 inch-pounds).
c. Place one 5/8 flat washer on the shoulder of the fan
motor shaft. Insert the key in the keyway and lubricate
the fan motor shaft and threads with a graphite-oil
solution (such as Never-seez).
d. Install the fan onto the motor shaft. Place one 5/8 flat
washer with a 5/8-18 locknut onto the motor shaft and
torque to 40 foot-pounds.
e. Install the evaporator fan assembly in reverse order
of removal. Torque the four 1/4-20 clamp bolts to 0.81
mkg (70 inch-pounds) Apply power momentarily to
check for proper fan rotation (refer to paragraph 2.3).
If fan spins backward, then motor wiring or motor is
defective.
f. Replace access panel making sure that panel does
not leak. Make sure that the T.I.R. locking device is
lockwired.
a. Remove upper access panel (see Figure 2-2) by
removing mounting bolts and T.I.R. locking device.
Reach inside of unit and remove the Ty-Rap securing
the wire harness loop. Then unplug the connector by
twisting to unlock and pulling to separate.
b. Loosen four 1/4-20 clamp bolts that are located on the
underside of the fan deck at the sides of the of the fan
assembly. Slide the loosened clamps back from the
fan assembly.
c. Slide the fan assembly out from the unit and place on
a sturdy work surface.
6.16.2 Disassemble The Evaporator Fan Assembly
a. Attach a spanner wrench to the two 1/4-20 holes
located in the fan hub. Loosen the 5/8-18 shaft nut by
holding the spanner wrench stationary and turning
the 5/8-18 nut counter-clockwise (see Figure 6-20).
6.17 EVAPORATOR FAN MOTOR CAPACITORS
b. Remove the spanner wrench. Use a universal wheel
puller and remove the fan from the shaft. Remove the
washers and key.
Units are equipped with one of 2 types of evaporator fan
motors, single, and dual capacitor. The evaporator fan
motors are of the permanent-split capacitor type.
6.17.1 When To Check For A Defective Capacitor
a. Fan motor will not change speed. For example: in the
conventional perishable mode, the motors should run
c. Remove the four 1/4-20 x 3/4 long bolts that are
located under the fan that support the motor and stator housing. Remove the motor and plastic spacer.
T--317
Stator
6. Impeller Fan
Flat washer, 1/4
7. Key
Bolt, 1/4-20 x 3/4
8. Mylar Protector
Locknut, 5/8-18
9. Evaporator Motor
Flat washer, 5/8
Figure 6-20. Evaporator Fan Assembly
6-16
in high speed. In the economy perishable mode they
should switch speeds and in the frozen mode, the motors should run in low speed.
6.18 SUCTION MODULATION VALVE
On start up of the unit, the valve will reset to a known
open position. This is accomplished by assuming the
valve was fully open, driving it fully closed, resetting the
percentage open to zero, then opening to a known 21%
staging position.
NOTE
The evaporator fan motors will always start in
high speed.
Suction Modulation
Valve (SMV)
b. Motor running in wrong direction (after checking for
correct wiring application).
c.
Motor will not start, and IP-EM’s are not open.
6.17.2 Removing The Capacitor
2-1/8 inch Nut
WARNING
Make sure power to the unit is OFF and
power plug disconnected before removing
capacitor(s).
Figure 6-21 Suction Modulation Valve (SMV)
6.18.1 Precheck Procedure
a. Check unit for abnormal operation.
b. Check charge. If refrigerant is low repair as required
and again check operation.
c. If sufficient capacity cannot be maintained or unit is
tripping excessively on high pressure switch (HPS) in
high ambients, check coils and clean if required.
d. If capacity or control cannot be maintained turn unit
OFF, then back ON. This will reset the valve in the
event the controller lost communication with the
valve, and may correct the problem.
The capacitors are located on the motor and may be
removed by two methods:
1 If container is empty, open upper rear panel of the
unit. The capacitor may be serviced after disconnecting power plug.
2 If container is full, turn the unit power OFF and disconnect power plug. Remove the evaporator fan
motor access panel. (See Figure 2-1). For removal
of the evaporator fan assembly, refer to section 6.16.
NOTE
Carefully listen to the valve. During reset, the
valve will make a ratcheting noise that may be
heard or felt as it is attempting to close. If this
can be heard or felt, it indicates that the controller and drive module are attempting to close the
valve, and may serve as a quick indication that
the drive module is in working order.
WARNING
With power OFF discharge the capacitor
before disconnecting the circuit wiring.
6.17.3 Checking The Capacitor
If the capacitor is suspected of malfunction, you may
choose to simply replace it. Direct replacement requires
a capacitor of the same value. Two methods for
checking capacitor function are:
e. During the first few minutes of unit operation, compressor reliability enhancement logic (CREL) may be
in effect. This places the valve at a 21% staging position and is sufficient to drive the temperature of the
supply probe down several degrees during this interval.
f. After the CREL time-out has been met, the valve will
start responding to the control logic and open or
close, relative to the demand. Scrutinize the unit operation for a few minutes. While in pulldown the unit
will open the SMV to a maximum discharge pressure
of 325 psig in high ambient conditions, or as much as
the current setting and control logic will allow. The
current level should be high. A lower discharge pressure will be seen in lower ambient temperatures.
Once the unit has reached set point, the SMV will go
into control mode. Both the discharge/suction pressures, and current draw will go significantly lower.
Once below set point, the suction pressure should go
into a vacuum within several minutes. Should the operation differ as mentioned, the SMV, controller, or
wiring may be faulty.
g. Check for correct wire location at the drive module
(SD) and the environmental connector (EC). Make
1. Volt-ohmmeter set on RX 10,000 ohms.
Connect ohmmeter leads across the capacitor
terminals and observe the meter needle. If the capacitor
is good, the needle will make a rapid swing toward zero
resistance and then gradually swing back toward a very
high resistance reading.
If the capacitor has failed open, the ohmmeter needle
will not move when the meter probes touch the
terminals. If the capacitor is shorted, the needle will
swing to zero resistance position and stay there.
2. Capacitor analyzer:
The function of the analyzer is to read the microfarad
value of a capacitor and to detect insulation breakdown
under load conditions. The important advantages of a
analyzer are its ability to locate capacitors that have
failed to hold their microfarad ratings, or those that are
breaking down internally during operation. It is also
useful in identifying capacitors when their microfarad
rating marks have become unreadable.
6-17
T--317
a poor connection or an open coil. Repair or replace
as required to achieve proper operation.
3. Restart unit, set the step rate to 200 PPS on SMA-12
for the valve, and close stepper valve while watching
the suction gauge. Within one minute the suction
pressure will go into a vacuum. This is an indication
that the valve is moving.
4. If no change in suction pressure is detected, check
for resistance (refer to step 6.18.2), and check connections for proper continuity and retest. If the valve
is functioning and all connections and motor resistance are good, check the drive module. (Refer to
step 6.18.3)
5. If the valve is determined as faulty after completing
the above steps, perform a low side pump down. Remove valve powerhead assembly, and replace with a
NEW valve powerhead assembly, torque nut to 35 ftlb, evacuate low side, and open all service valves.
sure that the wires terminate in accordance with the
wire markings (addresses).
h. Attach a manifold gauge set. If the unit is operating in
the perishable mode, proceed to step i. I f the unit t is
operating in the frozen mode, proceed to step j.
i. Perishable operation: If the operation of the unit is
in question, place the set point to approximately 6°C
(11°F) less than the current box temperature, so the
unit goes into pulldown. Run the unit for approximately one minute. Record readings on gauges and current draw. The current draw and pressures should go
up. Place set point to 0.5°C (0.9°F) above current box
temperature to fully modulate valve, and run for
approximately one minute.
NOTE
The unit may shut off for a short time. Wait until
the unit self starts and sufficient time has
elapsed to cause the valve to fully modulate.
CAUTION
Record new gauge readings and current draw. The
suction pressure should go into a vacuum and the
current draw should have gone down. If little or no
change to the suction pressure or current draw occurs, this is an indication of a malfunctioning SMV.
DO NOT disassemble piston from NEW suction modulating valve powerhead assembly. Doing so may result in damage to piston.
j. Frozen operation: In frozen mode the valve will tend
to stay open as much as possible. Again, this is dependent upon current limit setting and control logic.
Turn the unit OFF and ON, as in the perishable mode,
and watch the gauges. The valve will run at 21% open
if CREL logic is active, and will open to maximum allowable after this. Dependent on ambient conditions,
there should be an increase in suction pressure and
current draw as the valve opens, however, this may
be difficult at times to fully determine.
6.18.3 Checking The Controller
a. Turn unit OFF.
b. With voltmeter set to read 20 volts DC, attach the positive lead to MC1 and the negative lead to the TP9.
Turn ON unit, and watch the volt meter. After a short
delay, the reading should remain unchanged at 0
volts. If 5 VDC, check jumper wire form MC1 to MC8
is in place, if not, install and retest.
c. Disconnect the four pin connector to the SMV.
d. With voltmeter set to read 24 volts AC, attach the positive lead to the drive module outlet pin “A” (wire 1A) of
the 4 pin connector and the negative lead to the “B”
pin (wire 1B).
e. Turn ON unit, and watch the volt meter. After a short
delay, the reading should remain unchanged at 0
volts. If 5 VDC, check jumper wire form MC1 to MC8
is in place, if not install and retest.
f. Repeat for pins “C” and “D” (wires 2 A and 2 B).
g. If only one set of pins reads a voltage, check connections and retest.
h. If the retest reads out the same, controller is faulty.
i. If no voltage is present in any step, the output from the
controller may be faulty
k. If the unit still does not operate properly, stop unit, and
proceed to the following step to check out the SMV
system.
6.18.2 Checking The Stepper valve
a. Checking with ohmmeter
Disconnect the four pin connector to the stepper SMV.
With a reliable digital ohmmeter, check the winding
resistance. In normal ambient, the valve should have 72
to 84 ohms measured on the red/green (a-b terminals)
and on the white/black (c-d terminals) leads. If an infinite
or zero reading occurs, check connections and replace
the motor. If near normal or normal reading occurs,
proceed to section 6.18.3 to check out the controller.
b. Checking with SMA-12 portable stepper drive tester
The SMA-12 portable stepper drive tester (Carrier
Transicold P/N 07-00375-00) is a battery operated
stepper drive which will open and close the SMV, which
allows a more thorough check of the motor.
6.19 AUTOTRANSFORMER
If the unit does not start, check the following:
a. Make sure the 460 vac (yellow) power cable is
plugged into the receptacle (item 3, Figure 4-1) and
locked in place.
b. Make sure that circuit breakers CB-1 and CB-2 are in
the “ON” position. If the circuit breakers do not hold in,
check voltage supply.
c. There is no internal protector for this transformer
design, therefore, no checking of the internal protector is required.
To check operation:
1. Stop the unit, disconnect the four pin connector from
the stepper module to the valve (see Figure 6-21)
and attach the SMA-12 stepper drive to the connector going to the valve.
2. Set the SMA-12 pulse per second (PPS) to one PPS
and either open or close valve. Each LED should
light sequentially until all four are lit. Any LED failing
to light indicates an open on that leg which indicates
T--317
6-18
d. Using a voltmeter, and with the primary supply circuit
ON, check the primary (input) voltage (460 vac).
Next, check the secondary (output) voltage (230
vac). The transformer is defective if output voltage is
not available.
WARNING
With power OFF discharge the capacitor
and disconnect the circuit wiring.
6.20 POWER FACTOR CORRECTOR
CAPACITORS (PFC)
c. Checking the capacitor
If the capacitor is suspected of malfunction, you may
choose to simply replace it. Direct replacement requires
a capacitor of the same value. Two methods for
checking capacitor function are:
The power factor corrector capacitors are of the
permanent-split capacitor type. There are a total of
three capacitors with discharge resistors enclosed in a
single case.
1. Volt-ohmmeter set on RX 10,000 ohms.
Connect ohmmeter leads across the capacitor
terminals and observe the meter needle. If the capacitor
is good, the needle will make a rapid swing toward zero
resistance and then gradually swing back toward a very
high resistance reading. The reading should read about
330,000 ohms (for a good capacitor) due to the
discharge resistors.
a. When to check for a defective capacitor
The capacitors assist in correcting current draw by the
compressor. If one or more of the capacitors is faulty,
there will be an imbalance in current. In addition, the
power consumption of the unit will increase.
b. Removing the capacitor
If the capacitor has failed open, the ohmmeter needle
will not move when the meter probes touch the
terminals. If the capacitor is shorted, the needle will
swing to zero resistance position and stay there.
WARNING
2. Capacitor analyzer:
Make sure power to the unit is OFF and
power plug disconnected before removing
capacitor(s).
The function of the analyzer is to read the microfarad
value of a capacitor and to detect insulation breakdown
under load conditions. The important advantages of a
analyzer are its ability to locate capacitors that have
failed to hold their microfarad ratings, or those that are
breaking down internally during operation. It is also
useful in identifying capacitors when their microfarad
rating marks have become unreadable.
WARNING
Before removing the capacitors the
terminals must be checked for voltage with
a multimeter. The discharge resistors
installed on the unit (capacitors) should
bring the voltage to a safe level in a minute.
However, there may be a broken resistor
that retains voltage for a longer period, it is
highly recommended to wait 15 minutes
and to check for voltage.
6.21 CONTROLLER
6.21.1 Handling Controller
CAUTION
Do not remove wire harnesses from controller unless you are grounded to the unit
frame with a static safe wrist strap.
1. The capacitors are located on the unit sidewall
above the evaporator fan deck, and may be
removed by two methods:
CAUTION
(a.) If container is empty, open upper rear panel of
the unit. The capacitors will be on the right and
may be serviced after disconnecting power
plug.
Unplug all controller connectors before
performing arc welding on any part of the
container.
(b.) If container is full, turn the unit power OFF and
disconnect power plug. Remove the upper
fresh air makeup vent.
The guidelines and cautions provided herein should be
followed when handling the Controller/DataCORDER
module. These precautions and procedures should be
implemented when replacing the module, when doing
6-19
T--317
any arc welding on the unit, or when service to the
refrigeration unit requires handling and removal of the
controller.
1
1.
2.
3.
4.
2
3
This test point enables the user to check if the internal
protector for the compressor motor (IP-CP) or high
pressure switch is open.
TP3
4
This test point enables the user to check if the water
pressure switch (WP) contact is open or closed.
TP 4
This test point enables the user to check if the internal
protector for the condenser fan motor(IP-CM) is open or
closed.
TP 5
This test point enables the user to check if the internal
protectors for the evaporator fan motors (IP-EM1 or
IP-EM2) are open or closed.
TP 6
This test point enables the user to check if the controller
water tank heater relay (TQ) is open or closed
TP 7
This test point is not used in this application.
TP 8
This test point is not applicable to the units covered
herein.
TP 9
This test point is the chassis (unit frame) ground
connection.
TP 10
This test point enables the user to check if the heat
termination thermostat (HTT) contact is open or closed.
6.21.3 Controller Programming Procedure
To load new software into the module, the programming
card is inserted into the programming/software port.
Controller Software Programming Port
Mounting Screw
Controller
Test Points
Figure 6-22 Controller Section of the Control Box
a. Obtain a grounding wrist strap (Carrier Transicold
part number 07--00--304--00)and a static dissipation
mat (Carrier Transicold part number 07--00304--00.
The wrist strap, when properly grounded, will dissipate any potential buildup on the body. The dissipation mat will provide a static-free work surface on
which to place and/or service the controller.
CAUTION
b. Disconnect and secure power to the unit.
The unit must be OFF whenever a programming card is inserted or removed from the
controller programming port.
c. Place strap on wrist and attach the ground end to any
exposed unpainted metal area on the refrigeration
unit frame (bolts, screws, etc.).
d. Carefully remove the Controller. Do not touch any of
the electrical connections if possible. Place the module on the static mat.
NOTE
The metal door on the programming card must
be facing to the left when inserting.
e. The strap should be worn during any service work on
the controller, even when it is placed on the mat.
a. Procedure for loading Operational Software
1. Turn unit OFF, via start-stop switch (ST).
2. Insert the programming card for Operational Software into the programming/software port. (See
Figure 6-22)
3. Turn unit ON, via start-stop switch (ST).
4. The Display module will display the message run
COnFG. (If a defective card is being used the Display will blink the message “bAd CArd”. Turn startstop switch OFF and remove the card.)
5. Press the ENTER key on the keypad.
6. The Display will show the message “Pro SoFt.” This
message will last for up to one minute.
6.21.2 Controller Trouble-Shooting
A group of test points (TP, see Figure 6-22) are provided
on the controller for trouble-shooting electrical circuits
(see schematic diagram, section 7). A description of the
test points follows:
NOTE
Use a digital voltmeter to measure ac voltage
between TP’s and ground (TP9), except for
TP8.
TP2
T--317
6-20
7. The Display module will go blank briefly, then read
“Pro donE” when the software loading has loaded. (If
a problem occurs while loading the software: the Display will blink the message “Pro FAIL” or “bad 12V”.
Turn start-stop switch OFF and remove the card.)
Torque values for mounting screws (item 2, see
Figure 6-22) are 0.23 mkg (20 inch-pounds). Torque
value for the connectors is 0.12 mkg (10 inch-pounds).
6.21.5 Battery Replacement
8. Turn unit OFF, via start-stop switch (ST).
If required, use tool 07-00418-00.
9. Remove the programming card from the programming/software port and return the unit to normal operation by placing the start-stop switch in the ON
position.
6.22 VENT POSITION SENSOR SERVICE
The fresh air vent position sensor alarm (AL50) will
occur if the sensor reading is not stable for 4 minutes or if
the sensor is outside of its valid range (shorted or open).
This can occur if the vent is loose or the panel is
defective. To confirm a defective panel, assure that the
wing nut is secure and then power cycle the unit. If the
alarm immediately reappears as active, the panel
should be replaced.
b. Procedure for loading Configuration Software
1. Turn unit OFF using start-stop switch (ST).
2. Insert the programming card for Operationa Software into the programming/software port. (See
Figure 6-22.)
The alarm should immediately go inactive, check the
4--minute stability requirement. If the alarm reoccurs
after the four minutes and the panel was known to have
been stable, then the panel should be replaced.
3. Turn unit ON using start-stop switch (ST).
4. The Display module will show “nt40” on the left LCD
display and “541###” on the right LCD display. “###”
will indicate the dash number for a given unit model
number, use the UP or DOWN ARROW key to scroll
through the list to obtain the proper model dash number. For example, to program a model number
69NT40-541-05, press the UP or DOWN ARROW
key until the right display shows “nt40” on the right
display and “54105” on the left. (If a defective card is
being used, the Display will blink the message “bAd
CArd”. Turn start-stop switch OFF and remove the
card.)
The vent position sensor is calibrated using the keypad
as follows (Only required when installing a new panel) :
1. Set the vent to the 0 CMH/ CFM position.
2. Code select 45 will automatically displayed. Press the
Enter key and hold for 5 seconds.
3. After the enter key has been pressed CAL for calibration is displayed.
4. Press the ALT MODE key on the display and hold for
five seconds.
5. Press the ENTER key on the keypad.
5. After the calibration has been completed, Code 45 will
display 0 CMH / CFM.
6. When the software loading has successfully completed, the Display will show the message “EEPrM
donE.” (If a problem occurs while loading the software, the Display will blink the message “Pro FAIL”
or “bad 12V.” Turn start-stop switch OFF and remove
the card.)
6.23 TEMPERATURE SENSOR SERVICE
Procedures for service of the Return Recorder, Return
Temperature, Supply Recorder, Supply Temperature,
Ambient, Defrost Temperature, Compressor Discharge
and Compressor Suction temperature sensors are
provided in the following sub paragraphs.
7. Turn unit OFF using start-stop switch (ST).
8. Remove the programming card from the programming/software port and return the unit to normal operation by placing the start-stop switch in the ON
position.
6.23.1 Sensor Checkout Procedure
To check a sensor reading, do the following:
6.21.4 Removing and Installing the Controller
a. Remove the sensor and place in a 0_C (32_F) ice-water bath. The ice-water bath is prepared by filling an
insulated container (of sufficient size to completely
immerse bulb) with ice cubes or chipped ice, then filling voids between ice with water and agitating until
mixture reaches 0_C (32_F) measured on a laboratory thermometer.
a. Removal:
1. Disconnect all front wire harness connectors and
move wiring out of way.
2 The lower controller mounting is slotted, loosen the
top mounting screw (see Figure 6-22) and lift up and
out.
b. Start unit and check sensor reading on the control
panel. The reading should be 0_C (32_F). If the reading is correct, reinstall sensor; if it is not, continue with
the following.
3 Disconnect the two back connectors (EC) and remove module.
4 When removing the replacement controller from its
packaging , note how it is packaged. When returning
the old controller for service, place it in the packaging
in the same manner as the replacement. The packaging has been designed to protect the controller
from both physical and electrostatic discharge damage during storage and transit.
c. Turn unit OFF and disconnect power supply.
d. Refer to paragraph 6.21 and remove controller to gain
access to the sensor plugs.
e. Using the plug connector marked “EC”, that is connected to the back of the controller, locate the sensor
wires (RRS, RTS, SRS, STS, AMBS, DTS, CPDS
OR CPSS as required). Follow those wires to the connector and using the pins of the plug, measure the
resistance. Values are provided in Table 6-1.
b.Installation:
Install the module by reversing the removal steps.
6-21
T--317
d. Prepare the cables by cutting wires to the opposite of
the sensor. (See Figure 6-24.)
When installing a single wire color two wire sensor,
cut one wire of existing two wire cable 40 mm (1-1/2
inch) shorter than the other wire.
When replacing two single sensors with a combination (three wire) sensor, the black wires of the cables
should be cut to the same length and the red wire of
one cable cut to the shorter length.
When replacing a original three wire sensor, cut the
black wire to the middle length and the red wire to the
shorter length.
Table 6-1 Sensor Temperature/Resistance Chart
Temperature
Centigrade
0
25
Temperature
Fahrenheit
Resistance
(Ohms)
RRS, RTS, SRS and STS:
32
32,650±91
77
10,000±50
AMBS and DTS
0
32
25
77
32,650 + 1720
-- 1620
10,000 + 450
-- 430
e. Strip back insulation on all wiring 6.3 mm (1/4 inch).
f. Slide a large piece of heat shrink tubing over the
cable, and place small pieces of heat shrink tubing,
one over each wire, before adding crimp fittings as
shown in Figure 6-24.
Due to the variations and inaccuracies in ohmmeters,
thermometers or other test equipment, a reading
within 2% of the chart value would indicate a good
sensor. If a sensor is defective, the resistance reading will usually be much higher or lower than the resistance values given.
6.23.2 Sensor Replacement
a. Turn unit power OFF and disconnect power supply.
b. For two wire sensors, cut cable 5 cm (2 inches) from
shoulder of defective sensor and discard the defective sensor only. For three wire sensors cut at 23 cm
(9 inches). Slide the cap and grommet off well
mounted sensor and save for possible reuse. Do not
cut the grommet.
c. If required, prepare the replacement sensor by cutting sensor wire(s) back 40 mm (1-1/2 inch). For three
wire sensors the black wire should be cut at the
middle length and the red/white wire cut to the shorter
length. (See Figure 6-23.)
Sensor
g. If required, slide the cap and grommet assembly onto
the replacement sensor. If the replacement sensor is
of a larger diameter than the original, a different grommet may be required.
h. Slip crimp fittings over dressed wires (keeping wire
colors together). Make sure wires are pushed into
crimp fittings as far as possible and crimp with crimping tool.
i. Solder spliced wires with a 60% tin and 40% lead
Rosincore solder.
j. Slide heat shrink tubing over splice so that ends of
tubing cover both ends of crimp as shown in
Figure 6-24.
k. Heat tubing to shrink over splice. Make sure all seams
are sealed tightly against the wiring to prevent moisture seepage.
40 mm (1 1/2 inch)
l. Slide large heat shrink tubing over both splices and
shrink.
CAUTION
6.3 mm (1/4 inch)
Mounting Stud Type
Do not allow moisture to enter wire splice
area as this may affect the sensor resistance.
40 mm (1-1/2 inches)
6.3 mm (1/4 inch)
m. Reinstall sensor, refer to paragraph 6.23.3.
Sensor
NOTE
The P5 Pre-Trip test must be run to inactivate
probe alarms (refer to paragraph 4.8).
Bulb Type
Figure 6-23 Sensor Types
T--317
6-22
REPLACEMENT 2 WIRE TO 2
WIRE OR 3 WIRE TO 3 WIRE
RED
BLACK
RED/WHITE
REPLACEMENT FOR DUAL SINGLE
SENSOR CONFIGURATION
Cable
Large Heat Shrink
Tubing
Heat Shrink
Tubing
Sensor (Typical)
Figure 6-24 Sensor and Cable Splice
6.23.3 Sensor Re--Installation
Evaporator Grille
a. Sensors STS/SRS
Combination
Sensor (Mount
in Either Clamp)
To properly position a supply sensor, the sensor must be
fully inserted into the probe holder. This positioning will
give the sensor the optimum amount of exposure to the
supply air stream, and will allow the Controller to
operate correctly. Insufficient probe insertion into the
probe holder will result in poor temperature control due
to the lack of air flow over the sensor.
Seal
It is also necessary to ensure that the probe tip does not
contact the evaporator back panel. The design
minimum clearance of 6 mm (1/4 inch) should be
maintained (see Figure 6-25).
Figure 6-26 Return Sensor Positioning
b. Sensor RTS/RRS
6.24 ELECTRONIC PARTLOW TEMPERATURE
RECORDER
Reinstall the return sensor as shown in Figure 6-26. For
proper placement of the return sensor, be sure to
position the seal section of the sensor against the the
side of the mounting clamp.
The microprocessor based temperature recorder is
designed to interface with the DataCORDER to log
temperature with time. The electronic recorder will
automatically record the return air, supply air, or both,
based on the setting of temperature controller
configuration code CnF37, refer to Table 3-4. The
recorder reads and records data from the Controller in
present time, under normal operating conditions.
c. Sensor DTS
The DTS sensor must have insulating material placed
completely over the sensor to insure the coil metal
temperature is sensed.
Sensor
Wires
If the power has been OFF for more than thirty days, the
recorder will NOT re--synchronize (the chart will not
advance to present time), the pen tip will move to the
currently recorded temperature, and the recorder will
resume normal temperature recording.
Cap and Grommet
Assembly
Evaporator
Back Panel
If using the Electronic Partlow Recorder CTD P/N
12-00464-xx
Where xx= an even number (example: 12--00464--08)
The recorder will STOP when the power is OFF, and the
pen tip will remain at the last recorded temperature on
the chart. When power is applied, and the power off
period is less than thirty days; the recorder will retrieve
the logged data from the DataCORDER for the power
off period and record it onto the chart, thereafter, the
recorder will resume normal temperature recording.
Probe
Holder
Supply
Air
Stream
Supply Sensor
Mounting
Clamp
If the optional DataCORDER battery pack is being used,
and the charge is too low to enable recording during the
power off period of less than thirty days, the pen tip will
move to below the inner chart ring for the period when
NO data was recorded by the DataCORDER.
6 mm
(1/4 inch)
Figure 6-25 Supply Sensor Positioning
6-23
T--317
1
3
2
1.
2.
4
10
3.
4.
5.
6.
7.
5
9
8.
8
9.
10.
7
Recorder Door
Change Chart
Button
Recorder Box
Pen Tip
Stylus Arm
Connector
Calibration Button
(Located underneath)
Mounting Screws,
#10-24 x 7/16 inches long
Hold Down Tab
Chart Retaining Nut
6
Figure 6-27. Electronic Partlow Temperature Recorder
If the power has been OFF for more than thirty days, the
NOTE
recorder will NOT re--synchronize (the chart will not
Failure to press the change chart button, when
advance to present time), the pen tip will move to the
changing a chart with the power OFF, may
currently recorded temperature, and the recorder will
result in the chart advancing when power is
resume normal temperature recording.
applied.
6.24.1Replacing the Recorder
d. Install a new chart, make sure the chart center hole
is placed over the center hub, and the chart edges
are behind the four hold down tabs (item 9).
a. Turn power to the unit OFF.
b. Open the recorder door (item 1, see NO TAG).
c.
e. Mark today’s date, container number, and other
required information on the new chart and install
under hold down tabs.
Locate the connector below the recorder, and
squeeze the ears together to disconnect the plug,
(item 6).
f.
d. Remove the four mounting screws (item 8), and
remove the recorder.
g. Gently lower the stylus arm until the pen tip (item 4)
comes in contact with the chart.
e. Install the new recorder by reversing the above
steps.
CAUTION
6.24.2Changing the Chart
NOTE
To prevent recorder corrosion, it is important to
assure the door is securely closed at all times
after completing the chart change.
Do not allow the recorder stylus to snap
back down. The stylus arm base is spring
loaded, and damage may occur to the chart,
or the stylus force may be altered.
DO NOT move the stylus arm up and down
on the chart face. This will result in damage
to the stylus motor gear.
a. Lift the stylus (item 5, NO TAG) by grasping the arm
near the base, and pull the arm away from the chart
until it snaps into its retracted position.
6.24.3Adjusting the Recorder Stylus
b. Remove the chart retaining nut (item 10), remove
the used chart, and record today’s date on the old
chart.
c.
Proper stylus force upon the chart paper is important.
Factory adjustment is 113 to 127 grams (4 to 4.5
ounces). To measure the force, use a spring type gage,
and attach it under the stylus as close as possible to the
Press the “Change Chart” button (item 2).
T--317
Replace the chart nut loosely, rotate the chart until
the correct day is aligned with the “start arrow,” and
hand tighten the chart nut.
6-24
pen tip (item 4). Exert pull on the gage perpendicular to
the chart surface. The measured force should be noted
just as the pen tip leaves the surface.
d. Choose rivet locations and drill the rivet holes in the
corresponding locations on the control box and patch
piece.
e. Apply the adhesive sealant around the damaged area
to form a seal between the control box and the patch
piece.
f. Rivet the patch piece in place.
g. File smooth any rough edges (including rivets) that
may come into contact with wires.
6.25 MAINTENANCE OF PAINTED SURFACES
NOTE
The two coil springs near the base of the stylus
are NOT involved in establishing chart contact
force. They serve only to hold the stylus in its
retracted position.
Correct adjustment is made by carefully bending the
portion of the stylus arm between the bend near the pen
tip, and the first bend towards the stylus arm base. If the
force is too low, the stylus trace will be light and difficult
to read. If the force is too great, wrinkling, or tearing of
the paper chart may occur.
The refrigeration unit is protected by a special paint
system against the corrosive atmosphere in which it
normally operates. However, should the paint system
be damaged, the base metal can corrode. In order to
protect the refrigeration unit from the highly corrosive
sea atmosphere, or if the protective paint system is
scratched or damaged, clean area to bare metal using a
wire brush, emery paper or equivalent cleaning method.
Immediately following cleaning, apply 2--part epoxy
paint to the area. and allow to dry. After the first coat
dries, apply a second coat.
6.24.4Rezeroing the Recording Thermometer
For Electronic Partlow Recorder CTD P/N
12-00464-xx
Where xx= an odd number (example: 12--00464--03 )
NOTE
6.26 COMPOSITE CONTROL BOX REPAIRS
Use chart CTD P/N 09-00128-00 (°F)
P/N 09-00128-01 (°C).
6.26.1 Introduction
This procedure provides instructions for repair of the
Carrier Transicold composite control box. Damage to
the control box may be in the form of a chip or hole, a
crack, a damaged thread insert or damage to the door
hinge inserts. Generally, the object of the repair must be
to ensure sufficient strength is restored to the damaged
area and the repair must keep the box water tight.
Information on repair kits and repair procedures for each
type of damage is provided in the following paragraphs.
Ambient temperature must be above 7°C (45°F) for
proper curing of epoxy repairs.
6.26.2 Cracks
Cracks in the control box are repaired using a fiberglass
patch over the damaged area. Materials required are
included in the Fiberglass Patch Kit supplied with Crack
Repair Kit, Carrier Transicold part number
76-00724-00SV (see Table 6-2).
a. The surface must be clean and dry. Roughen the surface with sandpaper to ensure a good bond.
b. Cut the fiberglass cloth to allow a 25mm (1--inch)
overlap around the area to be repaired.
c. Stretch and position the cloth over the area to be repaired and secure it with masking tape.
d. Make up sufficient epoxy glue to cover the cloth by
mixing equal parts of resin and hardener. Saturate the
cloth with the epoxy glue, spreading evenly.
e. Remove the tape and overlap the edge of the cloth
approximately 6 to 12 mm (1/4” to 1/2”) with glue.
f. Epoxy will dry in 45--60 minutes. When completely
cured (12 hours), use sandpaper to smooth edges of
the patch.
6.26.3 Chips And Holes
Chips and holes in the control box are repaired using a
piece of aluminum or stainless steel to cover the
damaged area. The material can be cut to suit and
riveted in place. An adhesive sealant must be used to
make the repair watertight. The adhesive sealant
(Sikaflex 221) is included in Crack Repair Kit Carrier
a. Press the “Calibration” button (item 7, Figure 6-27)
on the bottom of the recorder. The pen tip will drive
fully down scale, then move upscale to the chart ring
at --29°C (--20°F), and stop.
b. If the tip of the pen (item 4) is on the --29°C (--20°F)
chart ring the recorder is in calibration, proceed to
step c. If the tip of the pen is NOT on the --29°C
(--20°F) chart ring, the operator must loosen the two
screws on the bottom of the stylus arm to adjust the
pen tip manually to the --29°C (--20°F) chart ring.
Tighten the screws when adjustment is complete.
c.
Press the calibration button and the pen will position
itself to the correct temperature reading.
For Electronic Partlow Recorder CTD P/N
12-00464-xx
Where xx= an even number (example: 12--00464--08)
NOTE
Use chart CTD P/N 09-00128-00 (°F)
P/N 09-00128-01 (°C).
a. Press the “Calibration” button (item 7, Figure 6-27)
on the bottom of the recorder. The pen tip will drive
fully down scale, then move upscale to the chart ring
at 0°C (32°F), and stop.
b. If the tip of the pen (item 4) is on the 0°C (32°F) chart
ring the recorder is in calibration, proceed to step c.
If the tip of the pen is NOT on the 0°C (32°F) chart
ring, the operator must loosen the two screws on the
bottom of the stylus arm to adjust the pen tip
manually to the 0°C (32°F) chart ring. Tighten the
screws when adjustment is complete.
c.
Press the calibration button and the pen will position
itself to the correct temperature reading.
6-25
T--317
Transicold part number 76-00724-00SV (see
Table 6-2). Do not use an acetone based silicone
sealant (Which can be identified by a vinegar--like
odor).
a. To make up the patch, cut a piece of aluminum or
stainless steel so that it will overlap the damaged area
by at least 40 mm (1 1/2”) on all sides.
b. Choose rivet locations and drill the rivet holes in the
corresponding locations on the control box and patch
piece.
c. Apply the adhesive sealant around the damaged area
to form a seal between the control box and the patch
piece.
d. Rivet the patch piece in place.
e. File smooth any rough edges (including rivets) that
may come into contact with wires.
6.26.4 Inserts
The threaded brass inserts that are molded into the
control box will need to be replaced if the threads
become stripped, or if the insert becomes loose. The
inserts and epoxy are contained in repair kit, Carrier
Transicold part number 76-50084-00 (see Table 6-3).
There are 6 different inserts used in the control box.
Refer to Figure 6-29 for the locations of the various
inserts.
6.26.5 Door Hinge Inserts
If the door hinges have been pulled from the control box
drill and reinstall the hinge as shown in Figure 6-28 and
described in the following steps.
Figure 6-28 Door Hinge Repair
NOTE
An epoxy application gun is also needed, Carrier Transicold part number 07 -- 00391 -- 00.
Materials needed:
1. Cut two square pieces of 3 mm thick (1/8 inch)
aluminum or stainless steel approximately 40
mm (1 5/8”) square. These squares will serve
as backing plates.
The damaged insert must be removed from the control
box. Table 6-4 identifies the drill size and drill depth to be
used for each insert. A stop ring should be used on the
drill bit to limit the depth.
a. Center the drill bit on the insert and drill to the prescribed depth.
b. Remove the chips from the drilled hole.
c. Mix the two component epoxy and fill the hole 1/2 way
to the top with epoxy.
d. Press the insert in until it is flush with the surface.
e. Wipe away any excess epoxy. The part is ready for
service after the bond material has hardened and is
tack free (approximately 20 minutes)
T--317
2.Two nuts, bolts (10 -- 24 x 1”) and washers for
each insert that needs repair.
a. Drill a 1/4” hole in the center of each square backing
plate.
b. Pass the bolts through the bolts holes in the door
hinge, then through the control box at the location
where the hinge insert pulled out.
c. From inside the control box, slide the backing plates
over the bolts and secure in place with the washers
and nuts.
6-26
Table 6-2 Crack, Chip & Hole Repair Kit
ITEM
DESCRIPTION
PART NUMBER
Qty
1
Crack Repair Kit -- Includes
76--00724--00SV
1
2
. . . Fiberglass Patch Kit (Loctite FK--98 or 80265)
76--00724--00Z
10
3
. . . Sikaflex 221 Adhesive Sealant (Sikaflex 232--361)
02--00067--02Z
10
4
. . . Instruction Sheet
98--02339--00
10
Table 6-3 Insert Repair Kit
ITEM
DESCRIPTION
PART NUMBER
Qty
1
Insert Repair Kit -- Includes
76--50084--00
1
2
. . . Insert - 17.53 x 9.91 mm (..690 x .390 in) 1/4--20 Threads
34--06231--01
10
3
. . . Insert - 15.88 x 6.35 mm (.625 x .250 in) 10-24 Threads
34--06231--03
10
4
. . . Insert - 25.15 x 7.54 mm (.990 x .297 in) 10-24 Threads
34--06231--04
10
5
. . . Insert - 10.16 x 9.53 mm (.400 x .375 in) 10-24 Threads
34--06231--05
10
6
. . . Insert - 12.7 x 9.91 mm (.5 x .390 in) 1/4--20 Threads
34--06231--06
10
7
. . . Insert - 9.53 x 6.76 mm (.375 x .266 in) 10-24 Threads
34--06231--07
10
8
. . . Durabond Epoxy E20--HP (Loctite 29314)
02--0082--00
1
9
. . . Static Mixing Tube (Loctite 983440)
07--00390--00
1
10
. . . Instruction Sheet
98--02338--00
1
Note: Insert repair procedures require use of an Application Gun, Carrier part number 07--00391--00 (Loctite 983435)
Table 6-4 Drill Information
Item
1
2
3
4
5
6
Insert part number
34- 06231- 01
34- 06231- 03
34- 06231- 04
34- 06231- 05
34- 06231- 06
34- 06231- 07
Drill size and depth
10.3 mm x 17.8 mm deep (.404 in. x .700 in. deep)
6.8 mm x 16.3 mm deep (.266 in. x .640 in. deep)
7.9 mm x 25.4 mm deep (.3125 in. x 1.0 in. deep)
6.9 mm (.270 in.) Drill completely through.
10.3 mm (.404 in.) Drill completely through.
6.8 mm (.266 in.) Drill completely through.
6-27
T--317
Figure 6-29. Insert Location
T--317
6-28
07
03
03
04
05
06
03
03
INSERT PART NUMBERS 34--06231--## WHERE THE ## IS AS INDICATED
05
07
01
03
04
03
c.. Remove the circuit breaker panel, with circuit
breaker, from the control box.
6.27 COMMUNICATIONS INTERFACE MODULE
INSTALLATION
d.. Locate, wires CB21/CIA3, CB22/CIA5 and
CB23/CIA7 that have been tied back in the wire
harness. Remove the protective heat shrink from
the ends of the wires.
e.. Attach the three wires as addressed to the LOAD
side of the circuit breaker.
f.. Refit the circuit breaker panel.
g. Fit the new RMU into the unit.
h. Remove plugs CIA, CIB and CID from the wiring
harness and attach to the module.
CB1
Communications
interface Module
.i.
Replace the low voltage shield.
Table 6-5 Recommended Bolt Torque Values
Figure 6-30. Communications Interface
Installation
Units with communication interface module provision
have the required wiring installed. The provision wiring
kit (part number 76--00685--00), includes three
pre--addressed wires installed between the circuit
breaker and communication interface module locations.
These wires are to be connected to the module and
circuit breaker to allow the module to communicate over
the power system. To install the module, do the
following:
TORQUE
BOLT DIA. THREADS
FREE SPINNING
#4
40
5.2 in-lbs
#6
32
9.6 in-lbs
#8
32
20 in-lbs
#10
24
23 in-lbs
1/4
20
75 in-lbs
5/16
18
11 ft-lbs
3/8
16
20 ft-lbs
7/16
14
31 ft-lbs
1/2
13
43 ft-lbs
9/16
12
57 ft-lbs
5/8
11
92 ft-lbs
3/4
10
124 ft-lbs
WARNING
THE UNIT POWER PLUG MUST BE DISCONNECTED TO REMOVE POWER FROM
CIRCUIT BREAKER CB1
N.m
.6
1.0
2.25
2.6
8.4
1.52
2.76
4.28
5.94
7.88
12.72
17.14
NONFREE SPINNING (LOCKNUTS ETC.)
1/4
20
82.5 in-lbs
9.3
5/16
18
145.2 in-lbs
16.4
3/8
16
22.0 ft-lbs
30
7/16
14
34.1 ft-lbs
46
1/2
13
47.3 ft-lbs
64
9/16
12
62.7 ft-lbs
85
5/8
11
101.2 ft-lbs
137
3/4
10
136.4 ft-lbs
168
a.. CB1 is connected to the power system, see wiring
schematic. Ensure that the unit power is off AND
that the unit power plug is disconnected.
b.. Open control box, see Figure 6-30 and remove low
voltage shield. Open high voltage shield.
6-29
T--317
Table 6-6 Wear Limits For Compressors
PART NAME
MAIN BEARING
Main Bearing Diameter
Main Bearing Journal Diameter
PUMP END
Main Bearing Diameter
Main Bearing Journal Diameter
CONNECTING ROD
Piston Pin Bearing
CRANKPIN DIAMETER
Throw
THRUST WASHER (Thickness)
CYLINDERS
Bore
Piston (Diameter)
Piston Pin (Diameter)
Piston Ring Gap
Piston Ring Side Clearance
FACTORY MAXIMUM
inches
mm
1.6268
41.3207
FACTORY MINIMUM
inches
1.6233
1.3760
34.9504
1.3768
34.9707
1.072
0.154
27.2288
3.9116
2.0010
50.8254
0.013
0.002
00.3302
00.0508
mm
41.2318
1.3735
34.8869
0.6878
1.3735
1.070
0.1520
17.4701
34.8869
27.1780
03.8608
1.9860
0.6873
0.0050
0.0010
50.4444
17.4574
00.1270
00.0254
Table 6-7 Required Tools
DESCRIPTION
ITEM
1
Piercing Valve, Hand Valve type (For 3/8 inch ID copper tube)
2
Pinch-off Tool (Robinair P/N 12396)
3
Oxyacetylene Torch with brazing tip
4
Safety Glasses
5
Brazing alloy Sil-Foss 5%
6
Refrigerant Recovery Unit
7
Flaring Tool (suitable for 3/8 inch ID copper tube)
8
3/8 inch Flare Nut (P/N 40-00097-06)
9
R-134a Refrigerant Gauge Set (P/N 07-00294-00)
10
Adapter Fitting (1/4 inch x 3/8 inch male reducing flare union, P/N 40-00182-11)
11
Ninety degree swivel elbow (Low side, P/N 40-00519-00
12
Ninety degree swivel elbow (High side, P/N 40-00519-01
13
R-134a Quick connector (Low side, P/N 40-00520-00)
14
R-134a Quick connector (High side, P/N 40-00520-01)
15
Vacuum Pump (8 m3H = 5 cfm volume displacement, P/N 07-00176-01)
16
Tube Cutter
17
Assorted hand tools as necessary for intended repair
18
Cleaning materials, abrasive cloth, tube wire brush, stainless steel wool, etc.
19
Cylinder of R-134a refrigerant
20
Cylinder of dry nitrogen
T--317
6-30
MAXIMUM WEAR
BEFORE REPAIR
inches
mm
.0020
.0020
0.0508
0.0508
.0020
.0020
.0020
.0010
.0025
0.0508
0.0508
0.0508
0.0254
0.0635
.0250
0.6350
.0020
.0020
.0010
.0250
.0020
0.0508
0.0508
0.0254
0.6350
0.0508
Table 6-8 Compressor Torque Values
TORQUE RANGE
SIZE
DIAMETER
(inches)
1/16
1/8
1/4
1/4
THREADS
PER INCH
27 (pipe)
20 (pipe)
20 (pipe)
20
1/4
28
5/16
18
3/8
16
7/16
5/8
5/8
#10
1-1/2
14
11
18
32
18 NEF
USAGE
ft-lb
N.m
8 -- 12
6 -- 10
20 -- 25
10 -- 12
12 -- 15
12 -- 16
6 -- 10
12 -- 16
11 -- 16
8 -- 13
27 -- 34
13 -- 16
16 -- 20
16 -- 22
8 -- 13
16 -- 22
16 -- 20
2 -- 27
20 -- 30
27 -- 41
40 -- 50
55 -- 70
55
25
60
4
35
76 -- 83
34 -- 41
83 -- 103
5 -- 8
48 -- 62
------
60
30
75
6
45
Pipe Plug -- Crankshaft
Oil Return Check Valve -- Crankcase
Pipe Plug -- Gauge Connection
Connecting Rod Capscrew
Baffle Plate -- Crankcase
Side Shield
Oil Pump Drive Segment
Unloader Valve
Cover Plate -- Plate End
Bearing Head
Terminal Block Cap Screws
Suction Valve
Discharge Valve
Pump End Bearing Head
Bottom Plate -- Crankcase Compressor Foot
Cylinder Head
Motor End Cover -- Crankcase
Crankshaft
Oil Bypass Plug -- Crankcase
Oil Pump Drive Segment
Oil Level Sight Glass
NEF -- National Extra Fine
6-31
T--317
Table 6-9 R-134a Temperature - Pressure Chart
Temperature
Vacuum
_F
_C
“/hg
--40
--40
14.6
49.4
.35
.37
12.3
--30
--34
--25
Pressure
bar
_F
_C
psig
kPa
kg/cm@
bar
37.08
0.49
28
--2
24.5
168.9
1.72
1.69
41.6
31.25
0.42
30
--1
26.1
180.0
1.84
1.80
9.7
32.8
24.64
0.33
32
0
27.8
191.7
1.95
1.92
--32
6.7
22.7
17.00
0.23
34
1
29.6
204.1
2.08
2.04
--20
--29
3.5
11.9
8.89
0.12
36
2
31.3
215.8
2.20
2.16
--18
--28
2.1
7.1
5.33
0.07
38
3
33.2
228.9
2.33
2.29
--16
--27
0.6
2.0
1.52
0.02
40
4
35.1
242.0
2.47
2.42
45
7
40.1
276.5
2.82
2.76
50
10
45.5
313.7
3.20
3.14
55
13
51.2
353.0
3.60
3.53
60
16
57.4
395.8
4.04
3.96
65
18
64.1
441.0
4.51
4.42
70
21
71.1
490.2
5.00
4.90
75
24
78.7
542.6
5.53
5.43
80
27
86.7
597.8
6.10
5.98
85
29
95.3
657.1
6.70
6.57
90
32
104.3
719.1
7.33
7.19
95
35
114.0
786.0
8.01
7.86
100
38
124.2
856.4
8.73
8.56
105
41
135.0
930.8
9.49
9.31
110
43
146.4
1009
10.29
10.09
115
46
158.4
1092
11.14
10.92
120
49
171.2
1180
12.04
11.80
125
52
184.6
1273
12.98
12.73
130
54
198.7
1370
13.97
13.70
135
57
213.6
1473
15.02
14.73
140
60
229.2
1580
16.11
15.80
145
63
245.6
1693
17.27
16.93
150
66
262.9
1813
18.48
18.13
155
68
281.1
1938
19.76
19.37
Temperature
cm/hg kg/cm@
Temperature
Pressure
_F
_C
psig
kPa
kg/cm@
bar
--14
--26
0.4
1.1
0.03
0.03
--12
--24
1.2
8.3
0.08
0.08
--10
--23
2.0
13.8
0.14
0.14
--8
--22
2.9
20.0
0.20
0.20
--6
--21
3.7
25.5
0.26
0.26
--4
--20
4.6
31.7
0.32
0.32
--2
--19
5.6
36.6
0.39
0.39
0
--18
6.5
44.8
0.46
0.45
2
--17
7.6
52.4
0.53
0.52
4
--16
8.6
59.3
0.60
0.59
6
--14
9.7
66.9
0.68
0.67
8
--13
10.8
74.5
0.76
0.74
10
--12
12.0
82.7
0.84
0.83
12
--11
13.2
91.0
0.93
0.91
14
--10
14.5
100.0
1.02
1.00
16
--9
15.8
108.9
1.11
1.09
18
--8
17.1
117.9
1.20
1.18
20
--7
18.5
127.6
1.30
1.28
22
--6
19.9
137.2
1.40
1.37
24
--4
21.4
147.6
1.50
1.48
26
--3
22.9
157.9
1.61
1.58
T--317
6-32
Note: Curves to be used as troubleshooting guide only for model series 69NT40 with
fresh air makeup vent closed, unit powered on 460 VAC/60hz and SMV 100% open.
(Bar) psig
(22.0) 320
(20.7) 300
(19.3) 280
(17.9) 260
35_F (1.7_C)
Box
(16.6) 240
(15.2) 220
(13.8) 200
(12.4) 180
(11.0) 160
(9.7) 140
(8.3) 120
(6.9) 100
(5.5)
80
60
(15.6)
70
(21.1)
80
(26.7)
90
(32.2)
100
(37.8)
110
(43.3)
120 _F
(_C)
Ambient Air Temperature
(Bar) psig
(22.0) 320
(20.7) 300
(19.3) 280
(17.9) 260
(16.6) 240
(15.2) 220
(13.8) 200
(12.4) 180
(11.0) 160
(9.7) 140
0_F (--17.8_C)
Box
(8.3) 120
(6.9) 100
(5.5)
80
60
(15.6)
70
(21.1)
80
(26.7)
90
(32.2)
100
(37.8)
Ambient Air Temperature
110
(43.3)
120
_F
(48.9) (_C)
Compressor Discharge Pressure Versus Ambient Air Temperature at Stable Box Temperature
Figure 6-31 R-134a Compressor Pressure and Motor Current Curves Versus Ambient Temperature
(Sheet 1 of 2)
6-33
T--317
(Bar)
(.97)
psig
14
(.83)
12
(.69)
10
(.55)
8
(.41)
6
(.28)
4
(.14)
2
(0)
0
(--.14)
--2
(--.28)
--4
(--.41)
--6
60
(15.6)
35_F (1.7_C) Box
0_F (--17.8_C) Box
70
(21.1)
80
(26.7)
90
(32.2)
100
(37.8)
110
(43.3)
120 _F
(48.9) (_C)
Ambient Air Temperature
Compressor Suction Pressure Versus Ambient Air Temperature at Stable Box Temperature
17
16
15
35_F (1.7_C) Box
14
13
12
11
0_F (--17.8_C) Box
10
9
8
60
(15.6)
70
80
90
100
(21.1)
(26.7)
(32.2)
(37.8)
110
(43.3)
_F
(48.9) (_C)
120
Ambient Air Temperature
Compressor-- Motor Current Versus Ambient Air Temperature At Stable Box Temperature
Figure 6-31 R-134a Compressor Pressure and Motor Current Curves Versus Ambient Temperature
(Sheet 2 of 2)
T--317
6-34
SECTION 7
ELECTRICAL WIRING SCHEMATIC
7.1 INTRODUCTION
This section contains the Electrical Schematics and Wiring Diagrams. The diagrams are presented as follows:
Figure 7-1 Provides the legend for use with all figures.
Figure 7-2 Provides the schematic diagram for units covered in this manual.
Figure 7-3 Supplements the other schematic diagrams and provides schematics for the Upper and Lower VPS .
Figure 7--4 Provides the Schematic and Wiring Diagrams for the Electronic Partlow Recorder
Figure 7-5 Provides the wiring diagram for units for units covered in this manual.
Sequence of operation descriptions for the various modes of operation are provided in paragraph 4.10
7-1
T-317
LEGEND
SYMBOL
DESCRIPTION (Schematic Location)
SYMBOL
DESCRIPTION (Schematic Location)
AMBS
BM
CB1
CB2
CCH
AMBIENT SENSOR (E--19)
BYPASS MODULE (D--20)
CIRCUIT BREAKER -- 460 VOLT (J--1)
CIRCUIT BREAKER -- AUTO TRANSFORMER (D--1)
CRANKCASE HEATER (T--2)
HS
HST
HTT
HWH
HWP
HUMIDITY SENSOR (G--20)
HOSE HEATER SAFETY THERMOSTAT (G--14)
HEAT TERMINATION THERMOSTAT (F--12)
HUMIDITY WATER HEATER (Figure 7-3)
HUMIDITY WATER PUMP (Figure 7-3)
CF
CFS
CH
CI
CL
CONDENSER FAN CONTACTOR (M--10, P--6)
CONDENSER FAN SWITCH (L--10)
COMPRESSOR CONTACTOR (G--6, P--1)
COMMUNICATIONS INTERFACE MODULE (A--3)
COOL LIGHT (H--6)
IC
INTERROGATOR CONNECTOR [FRONT/REAR]
(T--19, T--20)
INTERNAL PROTECTOR (F--7, H--10)
IN RANGE LIGHT (M--15)
MANUAL DEFROST SWITCH (H--15)
CM
CP
CPT
CPDS
CPSS
CONDENSER FAN MOTOR (T--6)
COMPRESSOR MOTOR (T--1)
CONDENSER PRESSURE TRANSDUCER (H--20)
COMPRESSOR DISCHARGE SENSOR (C--19)
COMPRESSOR SUCTION SENSOR (E--19)
PDR
PE
PR
CR
CS
DHBL
DHBR
CHART RECORDER [TEMPERATURE RECORDER]
(Figure 7-3)
CURRENT SENSOR (M--2)
DEFROST HEATER -- BOTTOM LEFT (T--5)
DEFROST HEATER -- BOTTOM RIGHT (T--5)
RRS
RTS
S1
DHH
DHML
DHMR
DHTL
DRAIN HOSE HEATER (L--14)
DEFROST HEATER -- MIDDLE LEFT (T--5)
DEFROST HEATER -- MIDDLE RIGHT (R--5)
DEFROST HEATER -- TOP LEFT (T--5)
DHTR
DL
DPH
DPT
DTS
DEFROST HEATER -- TOP RIGHT (R--5)
DEFROST LIGHT (M--13)
DRAIN PAN HEATER (R--5)
DISCHARGE PRESSURE TRANSDUCER (L--20)
DEFROST TEMPERATURE SENSOR (D--19)
DVM
DVR
E1
F
DUAL VOLTAGE MODULE (E--1)
DUAL VOLTAGE RECEPTACLE (F--2)
EVAPORATOR FAN CONTACTOR #1 [HIGH]
(P--8, H--11, J--11)
EVAPORATOR FAN CONTACTOR #2 [HIGH]
(J--11, K--11, P--10)
EMERGENCY BYPASS SWITCH (L--8)
EMERGENCY DEFROST SWITCH (E--5, E--12, E--13)
EMERGENCY DEFROST LIGHT (L--12)
EVAPORATOR FAN CONTACTOR [HIGH]
(M--11, P--8, P--9, P--10)
EVAPORATOR FAN MOTOR (T--8, T--10)
EVAPORATOR FAN CONTACTOR [LOW]
(M--12, R--8, R--10)
FUSE (D--5)
FCR
FDH
FED
FH
FUSE -FUSE -FUSE -FUSE --
FT
HA
HHT
HM
HPR
FUSE -- TransFRESH (Figure 7-3)
HUMIDITY ATOMIZER (Figure 7-3)
HOSE HEATER THERMOSTAT (J--14)
HOUR METER (H--6)
HUMIDITY POWER RELAY (Figure 7-3)
HPS
HPT
HR
HIGH PRESSURE SWITCH (J--7)
HUMIDITY POWER TRANSFORMER (Figure 7-3)
HEATER CONTACTOR (M--13, P--3)
E2
EB
ED
EDL
EF
EM
ES
IP
IRL
MDS
RM
S2
SD
SMV
EVAPORATOR FAN CONTACTOR #2 [LOW]
(J--11, K--11, R--10,)
STEPPER MOTOR DRIVE (C--20)
SUCTION MODULATING VALVE (A--20)
SPT
SRS
ST
STS
TBU
SUCTION PRESSURE TRANSDUCER (K--20)
SUPPLY RECORDER SENSOR (L--20)
START -- STOP SWITCH (L--4)
SUPPLY TEMPERATURE SENSOR (C--20)
TRANSFORMER BRIDGING UNIT
TC
TCC
CONTROLLER RELAY -- COOLING (K--7)
TransFRESH COMMUNICATIONS
CONNECTOR (Figure 7-3)
CONTROLLER RELAY -- WATER
PUMP/ATOMIZER (Figure 7-3)
TD
TE
TF
TFC
TH
TI
TN
TP
TQ
CHART RECORDER (Figure 7-3)
DRAIN LINE HEATER (E--14)
EMERGENCY DEFROST (E--5)
HUMIDITY (Figure 7-3)
TR
CONTROLLER RELAY -- HEATING (K--13)
CONTROLLER RELAY -- IN RANGE (K--5) OR
WATER PUMP REVERSE (Figure 7-3)
CONTROLLER RELAY -- CONDENSER FAN (K--10)
TEST POINT (E--15, E--17, G--10, J--10, K--7, K--13,
M--15, FIG 7--4 & FIG 7--2 = K--11, FIG 7--3 = F--11)
CONTROLLER RELAY -- WATER TANK HEATER
(Figure 7-3)
TRANSFORMER (M--3)
AUTO TRANSFORMER 230/460 (D--3)
TransFRESH REAR CONNECTOR (Figure 7-3)
CONTROLLER RELAY -- NOT USED (D--15)
CONTROLLER RELAY -- LOW SPEED EVAPORATOR
FANS (FIG 7--2 = K--12, FIG 7--3 = G--12)
WCR
WH
WHTT
WETTING CURRENT RELAY
WATER HEATER RELAY (Figure 7-3)
WATER HEATER TERMINATION THERMOSTAT
(Figure 7-3)
WATER PRESSURE SWITCH (F--10)
WP
7-2
CONTROLLER RELAY -- HIGH
SPEED EVAPORATOR FANS
(FIG 7--2 = K--11, FIG 7--3 = G--11)
CONTROLLER RELAY -- DEFROST (D--14)
TransFRESH CONTROLLER (Figure 7-3)
TRANS
TRC
TS
TV
Figure 7-1 LEGEND
T--317
PUMP DIRECTION RELAY (Figure 7-3)
PRIMARY EARTH (J--2)
PROBE RECEPTACLE [USDA]
(F--19, M--20, N--20, P--20)
REMOTE MONITORING RECEPTACLE
(H--6, L--13, L--15)
RETURN RECORDER SENSOR (D--19 or M17)
RETURN TEMPERATURE SENSOR (D--19)
EVAPORATOR FAN CONTACTOR #1 [LOW]
(G--11, J--11, R--8)
Figure 7-2 SCHEMATIC DIAGRAM
7-3
T-317
ST
SEE FIGURE
7--2
TR
SEE FIGURE
7--2
TO KB7
TransFRESH CONTROLLER
Upper Air Exchange VPS
Lower Air Exchange VPS
Figure 7-3 SCHEMATIC DIAGRAM -- TransFRESH and Vent Position Sensors (VPS)
T--317
7-4
NOTE: STANDARD CONTROLLER JUMPERS: MA3 TO MA7 AND MA9 TO MA11
(SEE Figure 7-2 ) ARE REMOVED IN THIS APPLICATION
CR5
CR4
CR3
CR6
CR8
CR2
NOTE: STANDARD CONTROLLER JUMPERS: MA3 TO MA7 AND MA9 TO MA11
(SEE Figure 7-2) ARE REMOVED IN THIS APPLICATION
Figure 7-4 SCHEMATIC DIAGRAM, WIRING DIAGRAM-- Electronic Partlow Recorder
7-5
T-317
UPPER VPS
KB7
[DF11]
[CFS--2]
TRC2 TRC1
WIRES TO TR X2:
DF--(TFC), P--(TFC),
CIB1, GRD, CHA2,
RMA, KA12, EFA2,
HRA2 & CR8
ECG1
LOWER VPS
(ICF MAY BE IN
CONTROL BOX)
Figure 7-5 UNIT WIRING DIAGRAM -- (Sheet 1 of 2)
T--317
7-6
[UVPS1]
[UVPS2]
KA1
NOTE: RM MAY
BE OUTSIDE
BOX
KB7
[HPRB]
RMB
CFS
UVPS3
KA6
TFC1
[RMC]
CFA1
RMD
KB7
NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD.
ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS “[XXX]”.
Figure 7-5 UNIT WIRING DIAGRAM (Sheet 2 of 2)
7-7
T-317
INDEX
A
Air Cooled Condenser Section, 2-4
Discharge Pressure Regulator Valve, 2-3
Display Module, 3-2
Alarm, 3-6, 3-10, 3-12, 3-18, 3-27
E
Ambient Sensor, 2-3
Arctic Mode, 3-4
Evacuation, 6-3
Autotransformer, 6-18
Evaporator, 6-15
Evaporator Fan, 3-4, 6-16
B
Evaporator Section, 2-2
Expansion Valve, 6-14
Bulb Mode, 3-5
C
F
Failure Action, 3-4
Capacitors, 6-16
Filter--Drier, 2-5, 6-13
Checking Superheat, 6-14
Flange
Discharge, 2-3
Suction, 2-3
Communications Interface Module, 3-11, 6-29
Compressor, 6-6
Compressor Motor, 2-3
Compressor Section, 2-3
Compressor Sight Glass, 2-3
Condenser, Water--Cooled, 2-5
Condenser Coil, 6-11
Fresh Air Makeup, 2-1, 4-1
Frozen Mode, 4-7
Frozen Mode -- Conventional, 3-6
Frozen Mode -- Economy, 3-6
Function Code, 3-14, 3-25
Condenser Pressure Control, 3-4
G
Condenser Pressure Transducer, 2-5
Configuration Software, 3-3, 3-8
Configuration Variables, 3-13
Control Box, 6-25
Controller, 3-3, 6-18, 6-19
Controller Software, 3-3
Crankcase Heater, 4-4
D
DataBank, 3-11
DataCORDER, 3-7, 3-10, 4-3
DataCORDER Software, 3-7
DataLINE, 3-11
Gauge
High Pressure, 6-1
Low Pressure, 6-1
Manifold, 6-1
Manifold Connections, 6-2
General Description, 2-1
Generator Protection, 3-4
H
Heat Lockout, 3-4
Heater, 6-15
Heating Mode, 4-7
High Pressure Switch, 2-3, 6-11
DataReader, 3-10
I
Defrost Interval, 3-4
Defrost Mode, 4-7
Indicator, Moisture Liquid, 2-5
Disc, Rupture, 2-5
Inspection, 4-1, 4-3
Discharge Flange, 2-3
Introduction, 1-1
Index-1
T-317
INDEX -- Continued
K
Key Pad, 3-2
L
Refrigerant Charge, 6-4
Refrigeration, Repair, 6-1
Refrigeration Circuit, 2-10
Refrigeration System Data, 2-7
Refrigeration Unit -- Front Section, 2-1
Leak Checking, 6-3
Required Tools, 6-30
Liquid Line Process Tube, 2-5, 6-1, 6-6, 6-10
Rupture Disc, 2-5
Logging Interval, 3-10
Lower Air, 1-2
M
Microporcessor System, 3-1
S
Safety and Protective Devices, 2-9
Sampling Type, 3-10
Moisture Liquid Indicator, 2-5
Sensor
Ambient, 2-3
Supply Temperature, 2-3
Motor, Compressor, 2-3
Sensor Configuration, 3-8
Modes Of Operation, 3-4
Motor Current, 6-33
O
Sequence Of operation, 4-6
Starting, 4-3
Stepper Motor Suction Modulation Valve, 2-3
Oil Level , 6-10
Stopping, 4-3
Operational Software, 3-3, 3-7
Suction Flange, 2-3
Suction Line Process Tube, 2-3, 6-1, 6-6
P
Painted Surfaces, 6-25
Perishable Mode, 4-6
Perishable Mode -- Conventional, 3-5
Suction Modulating Valve, 6-17
Supply Temperature Sensor, 2-3
Switch
High Pressure, 2-3
Water Pressure, 2-5
Perishable Mode -- Dehumidification, 3-5
Perishable Mode -- Economy, 3-5
T
Power, 4-1
Power Autotransformer, 2-3
Temperature Control, 3-4, 3-6
Pre--Trip, 3-7, 3-10, 3-21, 3-26, 4-3
Temperature Recorder, 4-3, 6-23
Probe Check, 4-5
Temperature Sensor, 6-21
Process Tube
Liquid Line, 2-5, 6-1, 6-6, 6-10
Suction Line, 2-3, 6-1, 6-6
Thermistor Format, 3-10
Torque Values, 6-29, 6-31
Transducer, Condenser Pressure, 2-5
Q
Transformer, Power Auto, 2-3
Quench Expansion Valve, 2-3
R
Refrigerant, Recovery, 6-2
T-317
U
Upper Air, 1-2
USDA, 3-11
Index-2
INDEX -- Continued
V
W
Water Cooled Condenser, 6-12
Valve
Discharge Pressure Regulator, 2-3
Quench Expansion, 2-3
Stepper Motor Suction Modulation, 2-3
Water Pressure Switch, 2-5
Vent Postion Sensor, 6-21
Wiring Schematic, 7-1
Water--Cooled Condenser, 2-5
Water--Cooled Condenser Section, 2-5
Wear Limits, 6-30
Index-3
T-317
Carrier Transicold Division,
Carrier Corporation
Container Products Group
P.O. Box 4805
Syracuse, N.Y. 13221 U.S A
www.carrier.transicold.com
A member of the United Technologies Corporation family. Stock symbol UTX
©2004 Carrier Corporation D Printed in U. S. A. 11/04