CME1056
INTRODUCTION
This product manual contains the information
needed for the setup, installation, initial start up,
sanitation and maintenance of this ice machine.
Keep it for future reference.
Be certain that the information applies to the
model in question. If no model is listed, the
information applies to all models.
This manual is organized in the same way as the
expected use of the machine, it begins with
specifications, goes thru unpacking and setup,
shows where everything is; continues with initial
start up, then describes how it works. After that is
the sanitation section, followed by service diagnosis
and repair.
CM Cubed™ Cuber Performance Raised
to a Higher Power.™
™
TABLE OF CONTENTS
Specifications , , , , , , , , , , , , , PAGE 2
Air Cooled Layout , , , , , , , , , , , PAGE 3
Water Cooled Layout , , , , , , , , , PAGE 4
Pre-Installation , , , , , , , , , , , , , PAGE 5
Location & Assembly , , , , , , , , , PAGE 6
Cabinet Panel Removal: , , , , , , , , PAGE 7
Stacking: Requires Kit , , , , , , , , , PAGE 8
Stacking , , , , , , , , , , , , , , , , PAGE 9
Technicians Only: Harvest Cycle Operational
Sequence , , , , , , , , , , , , , , , PAGE 23
Sanitation and Cleaning , , , , , , , , PAGE 24
Additional Maintenance , , , , , , , , PAGE 25
Additional Maintenance: Ice Sensors and Water
Level Sensor , , , , , , , , , , , , , , PAGE 26
Additional Maintenance: Air Filter Replacement
, , , , , , , , , , , , , , , , , , , , , PAGE 27
Additional Maintenance: Condenser , , PAGE 28
Bin Thermostat: Installation , , , , , , PAGE 10
Service Diagnosis: Controller Diagnostic Light
Analysis , , , , , , , , , , , , , , , , PAGE 29
Plumbing - Air Cooled , , , , , , , , , PAGE 11
Service Diagnosis , , , , , , , , , , , PAGE 30
Plumbing - Water Cooled , , , , , , , PAGE 12
Service Diagnosis: Components , , , , PAGE 31
Electrical , , , , , , , , , , , , , , , , PAGE 13
PTCR Diagnosis , , , , , , , , , , , , PAGE 32
After Utility Connections , , , , , , , , PAGE 14
Operational Characteristics: CME1056 PAGE 33
Component Description and Function , PAGE 15
Removal and Replacement: Water Level Sensor
, , , , , , , , , , , , , , , , , , , , , PAGE 34
AutoIQ Controller , , , , , , , , , , , PAGE 16
How To Operate The Controller , , , , PAGE 17
Removal and Replacement: Fan Blade and/or Fan
Motor , , , , , , , , , , , , , , , , , , PAGE 35
Initial Start Up , , , , , , , , , , , , , PAGE 18
Access Valves , , , , , , , , , , , , , PAGE 36
Adjustments , , , , , , , , , , , , , , PAGE 19
Before Calling for Service , , , , , , , PAGE 37
How This Machine Works , , , , , , , PAGE 20
How This Machine Works , , , , , , , PAGE 21
Technicians Only: Freeze Cycle Operational
Sequence , , , , , , , , , , , , , , , PAGE 22
Parts Lists and Wiring Diagrams are Located in the Center of this Manual
May 2000
Page 1
CME1056
Specifications
This ice machine is designed to be installed
indoors, in a controlled environment. It will operate
satisfactorily under a wide variety of conditions. Do
NOT operate the machine in temperatures it has
not been designed for. Do NOT operate the
machine above or below the voltage limits for the
particular model. Do NOT operate the machine
with too little or too much water pressure.
Operational Limits
In addition, there may be other bins that can be
used, check Scotsman’s sales literature for
application information.
Kits:
• BH800 bin: Add kit KBT23
• BH900 bin: Add kit KBT22
• ID200 or ID250 Dispenser: Add adapter kit
Minimum
Maximum
Air Temperature
50oF.
100oF.
•
Water Temperature
40oF.
100oF.
•
Water Pressure
20 psi
80 psi
Voltage (60 Hz model)
198
253
Voltage (50 Hz model)
207
253
•
Inlet water flow required is 2.7 GPM.
•
All models will fit a standard, 30" wide Scotsman
Ice Storage Bin. Some examples are:
• BH550
• HTB555
KBT44. Do not deploy the CME1056’s
thermostat.
Lancer 30” wide dispenser. Add adapter kit
KSTAT-MD
Cornelius ED200 dispenser requires adapter
kit from Cornelius. Do not deploy the
CME1056’s thermostat.
Other combinations may be available. See
Scotsman product literature for more
information.
Stacking two CME1056s together requires
stacking kit: KSCME6-MD (cannot stack any
other model with a CME1056).
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and designs are subject to change
without notice.
Note: Slope front bins must have an internal baffle.
Scotsman BH550 and HTB555 have the required
Scotsman assumes no liability or responsibility of
baffle. Baffle must be approximately in the position any kind for products manufactured by Scotsman
shown in the diagram on page 5.
that have been altered in any way, including the
use of any parts and/or other components not
specifically approved by Scotsman.
Basic Information
Model Number
Dimensions
W" x D" x H"
(w/o bin)
Basic
Electrical
Maximum
Fuse Size
Refrigeran
t Charge
(R-404A)
CME1056AS-32F
30 ½ x 24 x 28
208-230/60/1
Air Cooled
18.75
20
44 ounces
CME1056WS-32F
same
208-230/60/1
Water Cooled
17.25
20
28 ounces
CME1056AS-3F
same
208-230/60/3
Air Cooled
13.63
15
44 ounces
CME1056WS-3F
same
208-230/60/3
Water Cooled
12.13
15
28 ounces
CME1056AS-6F
same
230/50/1
Air Cooled
44 ounces
CME1056WS-6F
same
230/50/1
Water Cooled
28 ounces
Condenser
Type
May 2002
Page 2
Minimum
Circuit
Ampacity
CME1056
Air Cooled Layout
6.00 in
15.2 cm
MINIMUM FOR
UTILITY CONNECTIONS
2.70 in
6.9 cm
PLAN VIEW
ICE
OPENING
9.85 in
25.0 cm
6.00 in
15.2 cm
MINIMUM FOR
AIR VENTILATION
18.70 in
47.5 cm
ICE
OPENING
January 2003
Page 3
1.63 in
4.1 cm
6.00 in
15.2 cm
MINIMUM FOR
AIR VENTILATION
CME1056
Water Cooled Layout
6.00 in
15.2 cm
MINIMUM FOR
UTILITY CONNECTIONS
PLAN VIEW
2.70 in
6.9 cm
9.85 in
25.0 cm
18.70 in
47.5 cm
1.63 in
4.1 cm
ICE
OPENING
.88 DIA. KNOCKOUT
ELECTRICAL INLET
CONDENSER INLET
3/8" F.P.T.
WATER INLET
3/8" FLARE
21.75 in
55.2 cm
15.53 in
39.4 cm
17.68 in
44.9 cm
BACK VIEW
10.25 in
26.0 cm
CONDENSER DRAIN
1/2" F.P.T.
4.31 in.
10.9 cm
SUMP DRAIN
3/4" F.P.T.
10.75 in
27.3 cm
23.06 in
58.6 cm
26.35 in
66.9 cm
May 2000
Page 4
2.38 in
6.0 cm
4.75 in
12.1 cm
SIDE VIEW
24.00 in
61.0 cm
ICE
OPENING
CME1056
Pre-Installation
Other Applications:
Check Scotsman sales information for
recommendations regarding applications.
Do not place Air Cooled models where the noise
from the fan will be objectionable.
Check the nameplate for electrical requirements.
The nameplate is located on the back of the ice
machine. While the model and serial number are
on the nameplate, a serial number plate is
located at the front of the machine, near the purge
valve.
Water:
There is no such thing as pure water. All water
contains some impurities. There are two ways
water carries the impurities: suspended and
dissolved. Suspended solids can be filtered out.
Dissolved solids must be diluted or treated. Water
filters are recommended to remove suspended
solids. Some filters also have treatment in them for
dissolved solids. Check with a water treatment
service for a recommendation.
Nameplate on Back Panel
Serial Number Plate, Remove
Front Panel to Locate
Service Technicians: All models covered here
come set from the factory at a “standard” water
rinse, which is compatible with typical water
conditions. They may be adjusted to “Minimum" or
“Maximum" water rinse after start up. If the prior
ice machine worked acceptably well with the local
water conditions, leave the machine at the factory
setting. If severe water conditions are present, and
water filters do not solve the problem acceptably,
adjust the machine to use more water. If water
conditions are excellent, adjust the machine to use
less water. See the Adjustments section.
Note: Water use adjustments are customer
convenience adjustments; they are NOT factory
defects and are NOT covered by warranty.
May 2000
Page 5
12.0"
Side View
4.0"
Cube Ice machines use more water than what
ends up in the bin as ice. While most water is used
during ice making, a portion is designed to “rinse"
out the water system to keep hard water scale
from clogging up the machine. That water rinse,
Note: Slope front bins must have an internal baffle.
combined with water filters, prolongs the times
Scotsman HTB555 and BH550 have the required
between needed water system cleaning.
baffle. Baffle must be approximately in the position
3
shown in the diagram.
Note: All Scotsman CM models, like those
described in this manual, feature Scotsman’s
AutoIQ™ control system and ReliaClean™ water
Baffle
system cleaning process.
CME1056
Location & Assembly
Air cooled models take room temperature air in
from the sides and discharge warm air out the
back. Do not place them where the heat and noise
will be objectionable.
Remove Air Baffle from its
Shipping Position.
Use baffle for
In-The-Corner Applications
A 6 inch MINIMUM clearance on the back, and
both sides is required for the basic operation and
service of the air cooled model.
Back View of Ice
Machine
Air Cooled
Condenser
Outlet
Airflow is in
the sides and
out the back
Attach Air
Baffle Here
Air
Baffle
Attach Air
Baffle Here
Baffle Position
Ice Machine
Top View
Note: A six inch side clearance with zero top
clearance will NOT provide enough air exchange
space for optimum performance. 12 inches side
clearance is required when there is no top
clearance.
Unpacking and Assembly:
Begin with unpacking the ice storage bin. Remove
the carton, and using part of the carton as a
cushion, tip the bin on its back to remove the skid
and attach the legs or casters.
Note: Stacked applications may not use casters.
Wall
Baffle
Baffle
Ice Machine
Top View
Wall
Ice Machine
Top View
Wall
17-2632-01 Rev. A.
Air cooled models come equipped with a baffle
that can be used when the machine is installed
in a corner.
The purpose of the baffle is to limit air
recirculation. This can occur in a corner when the
hot air from the back of the machine is re-drawn
back into the machine from the nearest side of the
machine.
Return the bin to an upright position. Check the bin
top gasket for gaps and tears, fill any in with food
Install the air baffle as shown. Place the baffle:
grade sealant prior to placing the ice machine on
• On the left rear corner when the left wall and
the bin.
back wall are between 6 and 18 inches from
Level the top edge of the bin front to back and
the unit.
left to right.
• On the right rear corner when the right wall
and back are between 6 and 18 inches from
If the ice machine has not been unpacked, do so
the unit.
now. Remove the carton from the skid. After
removal of the shipping straps, lift the ice machine
off the skid directly onto the bin.
Note: The machine is heavy! Use a mechanical
hoist if necessary.
Secure the ice machine to the bin with the
hardware provided (two metal straps and 4 bolts).
May 2000
Page 6
CME1056
Cabinet Panel Removal:
Note: The top panel holds the upper edges of the
side panels in place.
1. Remove the front panel by removing the two
screws connecting the top edge of the front panel
to the machine, then pull out at the bottom.
2. Lift up at the front edge and push the top panel
back until it releases from the tabs connecting it to
the back panel.
3. Remove the screws at the front edge of the left
side panel, and pull forward until it releases from
the tabs connecting it to the back panel.
Remove The
Front Panel
First
May 2000
Page 7
CME1056
Stacking: Requires Kit
Only like models may be stacked. Begin after the
Upper Machine:
bottom unit has been placed on the ice storage bin
and secured. Stacking requires heavy duty leg kits. 8. Knock out 1 hole in the lower left (viewed from
the front) corner of the upper unit’s back panel.
Casters are NOT recommended.
Bottom Machine:
Lower Unit:
1. Remove front, side, and top panels.
9. Knock out 1 hole in the upper left (viewed from
the front) corner of the lower unit’s back panel.
2. Hang the plastic shield from the tabs on the
stainless steel bracket.
3. Locate the two notches on the sides of the top
edge of the freezing compartment.
10. Position the strain reliefs over the wrapped
portion of the stacking kit wire harness.
11. Route the Stacking Kit wire harness from the
back to the top and bottom machines thru the
holes made in steps 8 and 9.
The harness is marked which end goes to which
machine.
Notch
Push the strain reliefs into place from the back of
the machines.
Follow local codes for 24 volt wire
12.Route wire harness in lower ice machine to the
controller. Connect to terminal #7. Plug the two
free wires onto thermostat terminals #1 and #2
4. Place the bracket over the notches of the
freezing compartment.
Routing of
Harness
Bracket
Shield
5. Secure bracket to freezing compartment with
screws from the kit (from the sides).
6. Locate gasket material in kit. Place a layer of
gasket material on the top edge of the plastic
freezing compartment.
7. Place the top ice machine onto the bottom one.
Secure together with hardware from the top
machine. Remove front and left side panels.
May 2000
Page 8
CME1056
Stacking
Top Machine:
13. Route the wire to the controller. Connect to
terminal 7.
15. Mount the bulb of the thermostat to the bracket
from the kit.
Bottom Machine
16. Install the bin thermostat bracket onto the
bottom of the machine.
17. Pull back excess cap tube and coil up in the
machine.
14. Route the bulb of the thermostat thru the base
of the unit into the bin.
18. Connect wires from harness to thermostat
terminals.
Both Machines:
19. Return all panels and covers to their normal
positions.
20. Complete the balance of the installation.
March 1999
Page 9
CME1056
Bin Thermostat: Installation
The bin control is a thermostat. Its bulb must be
deployed after the ice machine has been placed
on the bin or dispenser.
5. Fasten the bracket to the bottom of the ice
machine with the two 3-pronged knobs supplied
with the unit.
Before starting, remove the left side panel and any
baffle in the bin.
1. Locate bin thermostat bulb.
2. Route bulb thru routing hole (located between
the compressor and the reservoir).
Routing Hole
6. Pull back into the ice machine any excess
capillary tubing.
7. Return the baffle to the bin and continue with
the installation.
Bin Thermostat Altitude Correction Table
CW Turns of Range Screw (under plastic cover)
3. Locate bin thermostat bracket.
Feet
Turns
Feet
Turns
4. Carefully position the thermostat bulb on the
bracket.
2000
55o
8000
340o
4000
160o
9000
385o
6000
250o
10000
405o
Use This Table to Adjust Thermostat
Insert Tip
May 2000
Page 10
CME1056
Plumbing - Air Cooled
All models require an adequate potable water
supply and a gravity drain. The recommendations
for tubing are:
• Water supply to be 3 8" OD.
• Drain to be 3 4" OD.
Drain:
Note: When replacing a prior ice machine, do not
take a short cut and reuse the old inlet and drain
system. INSTALL A NEW SYSTEM.
Supply:
All Drain Tubing Material must be RIGID.
Flexible tubing will eventually cause a restricted
drain.
Air cooled models have 1 gravity drain connection,
a 3 4" FPT fitting at the back of the cabinet. Use only
RIGID TUBING. Flexible tubing may be easily
kinked or become cracked.
The drain tube must be vented at the back of the
cabinet. Use an 18" high vent.
Air cooled models have 1 water supply connection, The ice storage bin will have a drain out the back or
a 3 8" male flare at the back of the cabinet. Connect base, depending upon the model.
to cold potable water that has adequate pressure.
The drain for the ice machine and the ice storage
Note: Using water supply tubing smaller than 3 8"
bin must be SEPARATE or the ice machine’s drain
will cause severe operational issues.
water may run into the bin and MELT THE ICE.
Water Filters:
Insulation is recommended for the ice machine
reservoir and bin drains.
The water filters must flow at least 2.7 GPM or they
Follow all applicable codes
will cause severe operational issues. Check with
the filter manufacturer. When replacing a prior ice
machine, do NOT assume that the water flow
capacity of the filter will be adequate.
Water Inlet
System
Water IN
Water OUT
Vent this
Drain
Bin Drain
Plumbing Connections
May 1999
Page 11
CME1056
Plumbing - Water Cooled
All models require an adequate potable water
supply and a gravity drain. The recommendations
for tubing are:
• Water supply to be 3 8" OD.
• Drain to be 3 4" OD.
When replacing a prior ice machine, do NOT
assume that the water flow capacity of the filter will
be adequate.
All Drain Tubing Material must be RIGID.
Flexible tubing will eventually cause a
restricted drain.
Note: When replacing a prior ice machine, do not
take a short cut and reuse the old inlet and drain
system. INSTALL A NEW SYSTEM.
Supply:
Water cooled models have TWO water supply
connections, a 3 8" male flare for POTABLE water
AND an additional 3 8" FPT condenser inlet
connection, both at the back of the cabinet.
Connect both to cold water w/adequate pressure.
Note: Using water supply tubing smaller than 3 8"
will cause severe operational issues.
Water Filters:
The water filters must flow at least 2.7 GPM to the
potable water inlet or they will cause severe
operational issues. Check with the filter
manufacturer.
Drain:
Water cooled models have TWO gravity drain
connections, a 3 4" FPT fitting AND a ½ “ FPT
fitting. Use only RIGID TUBING. Flexible tubing
may be easily kinked or become cracked.
The reservoir drain must be vented at the back of
the cabinet. Use an 18" high vent. Do NOT vent
the condenser drain.
The ice storage bin will have a drain out the back
or base, depending upon the model.
The drain for the ice machine and the ice storage
bin must be SEPARATE or the ice machine’s drain
water may run into the bin and MELT THE ICE.
Insulation is recommended for the ice machine
reservoir and bin drains.
Follow all applicable codes
Water Inlet
System
Potable
Water IN
Do NOT Vent the
Condenser Drain
Water OUT.
VENT THIS
DRAIN
Bin Drain
Plumbing Connections
May 2000
Page 12
CME1056
Electrical
All models must be installed with the correct wire
Follow all Local, State and National codes.
size and type per the National Electric Code.
Locate the nameplate on the back of the cabinet
and find the numbers for Voltage, Phase, Minimum
Circuit Ampacity and Maximum Fuse Size. Either
fuses or HACR type circuit breakers may be used.
Electrical connections are made in the junction box
in the back of the cabinet.
1. Remove the junction box cover.
2. Knock out 1 hole for a field supplied strain relief.
3. Install wires and strain relief per code.
4. Connect to wires and secure ground wire to
ground screw inside the junction box.
Electrical
Power
Supply
Power IN
Power Supply Connections
May 2000
Page 13
CME1056
After Utility Connections
1. Level the cabinet, use the leg levelers on the
end of the legs to adjust the cabinet height.
2. Wash out the bin. If desired, the interior of the
bin could be sanitized.
3. Locate the ice scoop (if supplied) and have it
available for use when needed.
Final Check List:
____1. Is the unit located indoors in a
controlled environment?
____2. Is the unit located where it can receive
adequate cooling air?
____3. Has the correct electrical power been
supplied to the machine?
____4. Have all the water supply connections
been properly made?
____5. Have all the drain connections been
properly made?
____6. Has the unit been leveled?
____7. Have all unpacking materials been
removed?
____8. Has the bin control been installed?
____9. Is the water pressure adequate?
____10. Have the drain connections been
checked for leaks?
____11. Has the bin interior been wiped clean or
sanitized?
____12. Have any water filter cartridges been
replaced?
May 2000
Page 14
CME1056
Component Description and Function
Reservoir: Contains the water for ice making.
Water Inlet Valve: Opens to allow water into the
reservoir.
Cube Deflector: The slots in the inclined deflector
allows the water falling from the evaporators back
into the reservoir, but when ice falls during harvest,
the ice slides off the deflector into the bin.
Water Level Sensor: Controls the size of the ice
cube by measuring how much water is used in a
cycle. It consists of a float, stem and electric eye.
The stem will move slightly when the pump is on,
this is normal. As the machine makes ice the
reservoir water level will fall and the visible portion
of the stem will slide down thru the slot in the
sensor body.
Refrigeration Service Access Valves: Only to be
used by a certified technician. Allows access to the
refrigeration system for diagnostic information.
Evaporators/Freezing Compartment: Location of
the evaporators. Ice forms on the evaporators and
is released when warmed up during the harvest
cycle. The freezing compartment is fully insulated
for maximum efficiency.
Purge Valve: Opens during the early part of the
harvest cycle to drain the reservoir.
Water Pump: Forces the water from the reservoir
to the top of the evaporators. The motor is
separated from the reservoir water to minimize
contact with the water.
Ice Sensor: A photo-electric eye set, located at
the front and back of the cube port.
Service
Valves
Evaporators
Purge Valve
Water Inlet
Valve
Water Level
Sensor
Water Pump
Reservoir
Ice Sensor
Component Location
May 2000
Page 15
CME1056
AutoIQ Controller
Indicator Lights:
Cycle Definitions:
• Bin Full: On when bin is full, goes on and
•
•
•
•
•
•
off as ice falls during a harvest cycle.
Freeze: On when the unit is in the Freeze
cycle, blinks when a freeze mode is pending.
Harvest: On when the unit is in the Harvest
cycle.
Clean: On when the unit is in the Clean
cycle, blinks when preparing for a clean
mode.
Off: On when the unit has been switched off,
blinks when the machine is preparing to shut
off.
Water: On when the controller has identified
a problem with the water system.
Refrigeration: On when the controller has
identified a problem with the refrigeration
system.
LOW VOLTAGE IN/OUT
WATER VALVE
HOT GAS VALVE
PURGE VALVE TIMER
CONTACTOR COIL
STACKING and/or
THERMOSTAT
FUTURE USE
RESERVOIR & DISCHARGE
LINE THERMISTORS
9
HI VOLTAGE IN/OUT
WATER PUMP
7
PUSH BUTTON
CONTROL SWITCHES
6
5
4
ICE SENSOR
3
FACTORY USE
operating to remove heat from the
evaporators. The compressor, fan motor (if
air cooled) and water pump are ON.
• Harvest: The refrigeration and water
systems are operating to harvest the ice
cubes. While the compressor is on for the
full cycle, the water pump will be off at the
beginning and inlet water valve will switch off
before the end.
• Clean: The Inlet Water Valve opens to fill the
reservoir. The Water Pump starts. The Clean
indicator light is switched ON. A manually
initiated rinse flushes the system.
8
ICE SENSOR
RESERVOIR WATER
LEVEL SENSOR
• Freeze: The refrigeration system is
INDICATOR LIGHTS:
BIN FULL
FREEZE
HARVEST
CLEAN
2
OFF
DIAGNOSTIC LIGHTS:
WATER
1
REFRIGERATION
May 2000
Page 16
CME1056
How To Operate The Controller
The Controller is a microprocessor based device
that receives input from several sources and
switches various components on and off.
To Reset Machine (machine off, error light on):
First push and release the Off button, then push
and release the Freeze button.
Its manual control is thru the use of the Push
Button Control Switches
Diagnostic Light Recall
8
To recall the last error on the blue housing CM3
controller:
1. Switch the unit OFF by holding the OFF button
for longer than 3 seconds.
9
2. Hold the Off button down again until the Purge
Setting indicators (Green Lights) are on.
3. Push and release the Harvest button.
7
6
5
4
3
PUSH BUTTON
CONTROL SWITCHES
INDICATOR LIGHTS:
BIN FULL
FREEZE
1
Push the Harvest button again and the
second-to-last error code will be displayed. The bin
full light will also be on to signal that this is the
second-to-last code.
Pushing the Harvest button again will display the
last error code again. Only two error codes are
available for display.
HARVEST
CLEAN
2
The last error code stored in the controller will be
displayed and the purge setting will disappear.
OFF
DIAGNOSTIC LIGHTS:
WATER
REFRIGERATION
If no error code exists, no code will be displayed
and there will be NO LIGHTS showing.
To return from the display of the last error, do
nothing for 60 seconds or push and hold the Off
button.
1. Freeze Button. Pushing and releasing this
button starts or restarts the machine. The AutoIQ
After returning from the display of the last error
Controller remembers what cycle it was last in and (Off light glows), the machine may be returned to
returns to that cycle.
the ice making process by pushing and releasing
the Freeze button.
2. Harvest Button: Pushing and releasing this
button will cause the machine to go directly to a
Harvest Cycle. Can be done from Freeze or Off.
The machine will switch Off at the end of the
Harvest cycle.
3. Clean Button: Pushing and releasing this
button will cause the machine to empty the
reservoir, refill and leave only the water pump on
for circulation of ice machine cleaner. After the ice
machine cleaner has circulated for about 10
minutes a second push of this button will switch on
the rinsing system to flush out the dissolved scale
and ice machine cleaner.
4. Off Button: Pushing and releasing this button
will switch the machine OFF at the end of the next
cycle. If the button is pushed and HELD for more
than 3 seconds, the unit will switch off
immediately.
March 2003
Page 17
CME1056
Initial Start Up
• The Bin Full indicator light will go on and off
1. Remove the front panel.
as ice falls from the evaporators.
2. Locate the AutoIQ Controller.
3. Switch on the electrical power. Note that the
controller’s indicator lights all flashed on briefly and
then the two red lights began to blink on and off
while the Harvest light (air cooled) or Clean and
Harvest lights (water cooled) were on. After 20
seconds the red lights go out, the Bin Full and Off
lights are On, and then the Bin Full light goes out,
leaving the Off light glowing.
4. Open the water supply valve.
6. Machines are shipped from the factory with the
purge level set to accommodate average water
conditions. To achieve optimal machine
performance, set the purge level to the minimum
setting.
Note: While the amount of water purge is
adjustable, only those installations with a water
supply known to be excellent (very low TDS)
should adjust to the minimum setting. See page 18
for purge adjustment instructions.
5. Push and release the Freeze cycle push button. 7. The machine’s correct cube size should result in
ice falling from the evaporator in vertical strips of 8
Initial Start
- 10 cubes; the top 2 cubes might fall individually.
• The Freeze light will begin to blink.
8. After about 6 minutes the machine will return to
• The Hot Gas Solenoid valve will be open.
a freeze cycle.
• The Purge valve will be open.
Note: After the first harvest, the controller will
• The Water pump is on.
adjust the harvest time as needed to release all
• The hot gas and purge valves close and the ice.
inlet water valve opens to fill the reservoir.
The inlet water valve will shut off when the
9. The water valve will re-fill the reservoir at the
reservoir is full.
beginning of freeze.
• The compressor starts.
10. Collect and discard the first batch of ice. Rinse
Freeze Cycle:
out the bin.
• The Freeze indicator light will be on. The
11. Fill out the Customer Evaluation and Warranty
machine will stay in a Freeze cycle for many
Registration. Send it to Scotsman.
minutes. Slush may appear in the reservoir,
it is temporary and normal.
12. Replace the front panel.
• The pump will stop for a few seconds a few
13. Inform the user of the location and telephone
minutes into the freeze cycle.
number of the local service company. Also inform
• The fan motor (of air cooled models) will
the user of the required maintenance of the
begin to turn and soon warm air will be
machine.
forced out the back of the cabinet.
• The freeze cycle will continue until the water Notes On Operation:
level in the reservoir drops to its factory set
1. The bin control signals the ice machine to shut
off whenever the bin becomes full, but the machine
point; the first time that happens in the
freeze cycle will cause the controller to open will not stop until it has finished the next harvest
the inlet water valve to refill the reservoir, the cycle. This last harvest cycle will be longer than
second time in the freeze cycle that this set the rest.
point is reached starts the Harvest Cycle.
2. After the bin has filled the unit will not be able to
restart for 4 minutes. However, if needed, the
Harvest Cycle:
Freeze button may be pushed to restart the unit.
• The Harvest indicator light will be ON,
• The hot gas valve will open.
For example: If ice is removed from the bin
• The purge valve will be open for 40 seconds. immediately after the machine has filled up and
shut off, the Bin Full light will be ON and the
• The water pump will stop. It will restart in
machine will not restart for 4 minutes.
less than 40 seconds.
• The purge valve closes and the Inlet water
valve will open for a short time to add water.
March 2003
Page 18
CME1056
Adjustments
If there was a problem during Initial Start
Up:
Thermostatic Expansion Valve:
If an error light came on, check the following.
The TXV is not adjustable, do not attempt to adjust
it.
1. Water error.
How to Adjust the Amount of Water Purge
A water error could have been determined by the
AutoIQ Controller if the inlet water valve does not
fill the reservoir, or if the water pump does not start
and lower the water level.
Adjustment is done by use of the control buttons
on the AutoIQ Controller. Examine the next section
to become familiar with the AutoIQ Controller
before beginning.
2. Refrigeration error.
1. If the machine is on, push and hold the OFF
button for more than 3 seconds, then release it.
This switches the machine Off.
A refrigeration error could have been determined
by the AutoIQ Controller if the water temperature
did not drop during the freeze cycle. The controller
will next check the compressor discharge
temperature, If the discharge temperature is too
low, the refrigerant error light will be switched on,
and the machine will Shut Down.
Note: Reset and restart the machine by
pushing and releasing the Off push button
switch, and then pushing and releasing the
freeze push button switch.
2. Push and hold the OFF button for more than 3
seconds (just until all lights flash on) then release
it. Do not hold it in it too long.
3. Examine the green lights. They should have all
flashed once, then certain ones will have turned on
to indicate which purge level the machine is set at.
There are 5 levels of purge available:
• 1. Maximum Purge is when All 5 lights are
Adjustments
How to adjust the water cooled discharge pressure
•
Water cooled models use a water regulating valve
to control how much cooling water flows thru the
water cooled condenser. At the top of that valve,
located in the back of the ice machine, is an
adjustment stem.
•
To Adjust:
•
1. Attach a refrigeration manifold gage to the
discharge access valve.
2. While the unit is in the freeze cycle, determine
the discharge pressure, it should be about 245
PSIG.
3. If needed, rotate the adjustment stem to
increase or decrease the pressure:
A. To increase discharge pressure (reduce water
flow) rotate the stem counter-clockwise.
•
ON. Use for extreme water conditions. Note:
This setting may extend the Harvest cycle
and reduce capacity.
2. Heavy Purge is when these 4 lights are
ON: Freeze, Harvest, Clean, Off. Use for
severe water conditions.
3. Standard Purge (factory setting) is when
these 3 lights are ON: Harvest, Clean, Off.
Use for moderate to severe water
conditions.
4. Moderate Purge is when these 2 lights
are ON: Clean, Off. This is for typical water
conditions.
5. Minimum Purge is when this light is ON:
Off. For excellent water conditions.
Adjust by pushing and releasing the Freeze button.
Pushing and releasing the Freeze button increases
the purge one level up to the maximum, then it
goes to the minimum.
4. The machine will automatically restart after 60
seconds of no switch inputs, or restart the machine
by pushing in and holding the Off button for more
B. To decrease the discharge pressure (increase
than 3 seconds, then releasing it. The unit will then
water flow) rotate the stem clockwise.
be Off. From there the machine may be placed in a
Remove the manifold when done. Note: The water freeze cycle by pushing and releasing the Freeze
outlet temperature should be between 100-110
button.
when the valve is properly set.
May 2000
Page 19
CME1056
How This Machine Works
During the Harvest cycle, water again enters the
water reservoir, and a purge valve opens to drain
the reservoir and dilute the concentration of
accumulated minerals. The purge valve is opened
The AutoIQ Controller operates the ice machine by for a fixed amount of time, but the water pump
monitoring several input measures and switching
does not start right away, but at a time determined
various loads on and off.
by the AutoIQ Controller’s purge setting. The
higher the purge setting, the sooner the water
Water System:
pump will start, and more water will be drained out.
Water flows into the ice machine during the
harvest cycle thru the inlet water valve. The water
valve will NOT be open the complete length of the
harvest cycle. The water pump forces water to the
top of the evaporators, both in the Freeze and
Harvest cycles. Un-frozen water falls thru the cube
deflector and back into the reservoir. As water is
turned into ice, the water level in the reservoir falls,
and at the point where the cubes are fully formed,
the Water Level Sensor indicates to the AutoIQ
Controller that it is time to begin the Harvest cycle.
This section is intended for the technician. It is not
necessary for the normal operation and
maintenance of the machine.
Water
Distribution
System
Water Inlet
Valve
Purge Valve
Water Pump
Water
Reservoir
May 2000
Page 20
CME1056
How This Machine Works
Refrigeration System
The refrigeration system is similar to that of most
commercial cube ice machines. Heat is removed
from the water and discharged out the condenser
during the freeze cycle. As liquid refrigerant
passes thru the Thermostatic Expansion Valve, it
enters the top of the evaporators, and ice will form
at the top first.
When cubes need to be released (Harvest) the Hot
Gas Valve is opened and Hot discharge gas flows
directly from the compressor to the evaporator
inlets.
This warms up the evaporators and the surface of
the ice frozen to the evaporator surface melts. Ice
then falls into the bin.
Condenser
Refrigerant
Distributor
Evaporators
Hot Gas
Valve
Thermo
Expansion
Valve
May 2000
Page 21
CME1056
Technicians Only: Freeze Cycle Operational Sequence
Assuming the machine has been operational, the
Freeze cycle begins with the end of the Harvest
Cycle:
•
•
•
•
•
Condenser fan is OFF
Water Inlet Valve is CLOSED
Water Pump may be ON
Compressor is ON
Hot Gas Valve is OPEN
restarts, the inlet water valve opens to refill the
reservoir.
8. As the machine makes ice, the water level in the
reservoir will ultimately fall to the Harvest Level .
The first time that happens during a freeze cycle
prompts the controller to re-fill the reservoir. The
next time it happens, the unit will begin to go into a
harvest cycle.
Air cooled models will switch off the fan motor a
few seconds before harvest begins.
Controller Operation, Beginning freeze:
1. Switches on the Freeze indicator light and shuts Note: If the freeze cycle exceeds the preset
Maximum (30 minutes), the Controller will Shut
off the hot gas valve.
Down on a Refrigeration Error.
2. Opens the water valve to top off the reservoir.
Water must fill the reservoir within 250 seconds or 9. At the end of Freeze cycle:
the controller shuts the machine down. It will
• Water level = below harvest position
automatically try to restart in 20 minutes.
• Condenser fan will be off
3. Measures the discharge temperature.
• Water inlet valve will be off
4. Starts the fan motor (air cooled only). The
• Water pump will be ON
Controller checks the discharge temperature and
• Compressor will be ON
cycles the fan every on for 10 seconds and off for
• Hot gas valve will be off
20 seconds if the temperature is low.
If the discharge temperature exceeds the design
maximum, shuts the machine down on a
Refrigeration Error.
5. Checks for a “bin full" signal throughout the
cycle.
At this point Harvest begins and the System
Controller switches the Harvest indicator light ON.
Restarts:
If restarting after shutting off because the bin was
full, the first freeze cycle sequence is like this:
6. Measures the reservoir water temperature. If the 1. Purge valve is open.
machine is operating correctly, the reservoir water
2. Pump starts.
temperature will fall at a standard rate. The
Controller will be checking to see if the water
3. Purge valve closes.
temperature fall matches that rate.
If not, it re-checks the discharge line temperature.
If too low, it Shuts Down on a Refrigeration Error. If
the discharge temperature is acceptable, the water
system is checked by shutting off the water pump
and determining if the water level goes up enough.
If it does not, it is assumed that there is a water
pump problem and the machine Shuts Down on a
Water Error.
If the water level does “measure up" the water
pump is restarted and the AutoIQ Controller then
measures how long it takes to lower the water
level. If the water level does not fall, the machine
Shuts Down on a Water Error.
7. Once per cycle the machine will shut off the
water pump. It only does this when the water
temperature reaches a preset minimum. The pump
will only be off for a few seconds. After the pump
4. Water valve opens to fill the reservoir.
5. Compressor starts.
Note: If there is a power interruption, after power is
restored the machine will restart, go thru a brief
Freeze cycle and then go thru a 6 minute Harvest
cycle. The Freeze light will be blinking - even when
the machine is in harvest.
Error Restarts:
The machine automatically attempts to restart 50
minutes after a shut down. If another problem
occurs in the next cycle, the machine will attempt
one more restart. If another problem occurs in the
next cycle, the machine will be off and must be
manually reset.
May 2000
Page 22
CME1056
Technicians Only: Harvest Cycle Operational Sequence
Harvest
Stacked Units:
The (air cooled model) fan is off.
If the bottom unit is in harvest and receives a
signal from the top unit that it is also in Harvest,
the bottom unit will stay in harvest for about 6
minutes.
The purge valve opens, and will remain open for
40 seconds.
The water pump shuts off, it will restart in less than If the bottom unit is shut off, but its controller still
40 seconds, depending upon the Purge Level set. has power, the top unit may continue to operate. If
the bottom unit’s power is shut off, the top unit will
The water pump restarts and pumps out water thru shut down on bin full at the end of the next cycle. If
the open purge valve until the valve closes.
the top unit’s power is shut off, it does not impact
the lower unit.
The inlet water valve then opens for about 9
seconds to add some water.
During the Harvest Cycle, ice will be falling from
the evaporators and between the ice sensor’s
electric eyes. The AutoIQ Controller monitors the
ice falling and stays in the Harvest Cycle until ice
quits going thru the electric eyes.
An error shut down on one unit does not affect the
other. Either may be switched off at the controller.
Diagnostic Lights and Manual Resets
The controller will shut the machine off if a
malfunction is sensed. The Controller will restart
the machine 2 times, with a 50 minute interval
The maximum harvest time is 13 minutes. The first between restarts. If a malfunction is still present
Harvest after a restart will be a long one to
after the second restart, the machine will then shut
establish a base line, then the actual time it took to off and must be manually reset. During the restart
release the ice is used to determine the length of
interval, the machine will be off and a diagnostic
the next harvest cycle.
code indicated.
If no cubes fall (or are sensed) by the end of
The exception to this is lack of water. The machine
Maximum Harvest Time, the machine senses a
will always try to re-fill the reservoir every 20
refrigeration error. If the next cycle also produces a minutes.
refrigeration error, the machine Shuts Down.
Diagnostic Code Table
Note: The last harvest cycle before shutting off on
bin full is 6 minutes long.
If a Diagnostic
Refrigeration
The machine will not restart for 4 minutes after
switching off on Bin Full, unless the freeze button
is pressed.
Note: If during a Bin Full shut down, the machine
has not restarted for 12 hours, the compressor will
run for 30 seconds to clear the oil of refrigerant.
Continuous Run Time:
A unit that operates 24 hours a day 7 days a week
is too small for the user’s needs. To maintain
harvest integrity, the controller will extend the
harvest time to 6 minutes minimum every 15th
consecutive harvest cycle.
Bin Thermostat (for those units so equipped):
In normal ambients the thermostat will react to ice
on the bulb in a few seconds. Reaction after
removal will take about a minute under normal
conditions, and longer in colder rooms.
Light
Water Light
Light
Blinks once and
repeats
Water pump did
not start
Very long ice
harvest
Blinks twice and
repeats
Lack of water fill
No harvest of
ice
Blinks three
times and
repeats
not used
High Discharge
Temperature
Is ON all the
time
Water valve
leaking thru
rapidly
Check for low
discharge
temperature or
long freeze
cycle
Both On all the
time
Check for thermistor set unplugged
or failed
Note: Diagnostic lights remain on until controller is
manually reset or until it successfully restarts the
machine.
May 2000
Page 23
CME1056
Sanitation and Cleaning
It is the User’s responsibility to keep the ice machine and ice storage bin in a sanitary condition.
Without human intervention, sanitation will not be maintained. Ice machines also require occasional
cleaning of their water systems with a specifically designed chemical. This chemical dissolves mineral
build up that forms during the ice making process.
Sanitize the ice storage bin as frequently as local health codes require, and every time the ice machine
is cleaned and sanitized.
The ice machine’s water system should be cleaned and sanitized a minimum of twice per year.
In Place Cleaning of the Ice Machine Water
System:
1. Remove all ice from the bin.
2. Remove the front panel.
3. Push and release the Harvest button (this releases
any ice that may be on the evaporators and warms
them up).
4. Wait for the machine to finish the Harvest cycle
(the machine will stop).
5. Remove the the evaporator cover, the cube
deflector, the cascading shield and the ice sensors.
Place the cascading shield and the cube deflector in
a separate container. Place the ice sensors in the
reservoir, but be sure that the ends of the connecting
wires are not in the water.
6. Push and release the Clean button. The Clean
indicator light will be blinking, and the pump will
restart.
7. Pour 24 ounces of Scotsman Ice Machine Cleaner
into the reservoir water. Return the evaporator cover
to its normal position.
8. Mix a solution of 8 ounces of Scotsman ice
machine cleaner and 1 gallon of warm (95-115oF.)
water. Use the solution to scrub the cascading shield
and cube deflector in the separate container.
Scotsman Ice Machine
Cleaner contains acids.
Acids may cause burns.
If concentrated cleaner
comes in contact with skin,
flush with water. If
swallowed, do NOT induce
vomiting. Give large
amounts of water or Milk.
Call Physician
immediately. Keep out of
the reach of children.
9. After the ice machine cleaner has circulated for 10
minutes, push and release the Clean button. This
starts the rinsing process. The Clean indicator light
will be ON. Note: The rinse process flushes any
residual cleaner out of the ice machine’s water
system.
10. Continue the rinsing process for 20 minutes, then
push the off button to switch the machine off.
11. Go to the next step to sanitize the machine or go
to step 19 to finish the cleaning process.
12. Mix 2 gallons of Sanitizer solution. Follow local
codes for Sanitizer.
Note: A possible sanitizing solution may be made by
mixing 1 ounce of liquid household bleach with 2
gallons of warm (95-115oF.) potable water.
13. Push and release the Clean button again.
14. Pour 24 ounces of Sanitizer solution into the
reservoir water.
15. After the solution has circulated for 10 minutes
push and release the Clean button. This starts the
rinse process. Sanitize the ice storage bin while
waiting.
16. Continue the rinsing process for 20 minutes, then
push the off button to switch the machine off.
17. Remove the evaporator cover and spray or wash
all interior surfaces of the freezing compartment
including the evaporator cover with sanitizer solution.
18. Thoroughly immerse the cascading shield and
cube deflector in the sanitizing solution.
19. Return the ice sensors, cascading shield and
cube deflector to their original positions.
20. Return the evaporator cover to its original
position. Push and release the Freeze button.
21. Return the front panel to its normal position and
secure it to the machine with the original screws.
May 2000
Page 24
CME1056
Additional Maintenance
To drain reservoir completely (if desired):
1. Remove front panel.
2. Push and hold the Off button.
3. Push and hold the Clean button for 3 seconds
to activate the purge valve.
6. Examine the top of the evaporators. The Water
Distribution Channels must be free from mineral
build up. If build up is evident, scrub the channels
with Scotsman Ice Machine Cleaner and a plastic
bristle brush.
To Sanitize the Ice Storage Bin
1. Remove all ice.
2. Remove baffle.
3. Switch ice machine OFF or wait for it to be in a
cleaning cycle.
4. Mix a 1 gallon solution of warm (95-115oF.)
water and sanitizer. Follow local codes for
sanitizer.
Distribution
Channels
5. Wash or spray the entire interior of the ice
storage bin with the sanitizer solution. This
includes the bottom of the ice machine and the
inside of the door, the door gaskets (if any) and
door frame.
6. Pour excess sanitizer into the bin to flush the
drain system.
7. Examine the water distributors. Although they
are made of a material that is resistant to mineral
build up, some may be present. Soak or scrub the
distributors in or with a solution of Scotsman Ice
Machine Cleaner and warm potable water.
7. If the approved sanitizer requires a rinse, rinse
all interior surfaces with potable water.
8. Return the water distributors to their normal
installed position.
Additional Maintenance: Water Distributors
It may become necessary to remove the water
distributors from the top of the evaporator and
clean (de-mineralize) them outside of the ice
machine.
1. Remove front panel.
2. Push and release the OFF button.
3. Remove the evaporator cover.
Distributors Must be Fully Seated as Shown
4. Lift up at the center of the water distributors and
disconnect the distributors from the manifold.
9. Return all panels to their original positions.
5. Repeat for all evaporators and distributors.
10. Push and release the clean button to flush the
water system.
11. After the machine stops, push and release the
Freeze button.
12. Replace the front panel.
May 2000
Page 25
CME1056
Additional Maintenance: Ice Sensors and Water Level Sensor
The ice sensors use a system of infrared emitting
and receiving components to sense ice. They are
located at the bottom of the ice outlet port. They
must be free of mineral build up to function
properly. To check:
1. Remove front panel.
2. Push and release the off button.
Cascading
Shield
Ice Sensor
Water Level Sensor:
Cube
Deflector
Clean the lenses inside the water level sensor.
1. Remove the sensor from its installed position.
2. Remove dust cover.
3. Wipe lenses clean with a cotton swab.
3. Remove the evaporator cover.
4. Remove the cube deflector.
5. Remove the cascading shield.
6. Pull the right sensor out of its socket.
7. Pull the left sensor out of its socket.
8. Examine the bottom of the brackets, there are
two sensors in each bracket, check that they are
clear of mineral build up. They may be wiped clean
with ice machine cleaner to assist in removal of
the build up. Be sure to drain the reservoir or go
thru a Clean cycle to remove residual cleaner.
Note: Do NOT use abrasive materials or cleaner
on the bin sensor lenses. A soft toothbrush is an
effective tool for cleaning these sensors.
Dust Cover
Reverse to Reassemble.
Lens
9. Reverse to reassemble.
May 2000
Page 26
Lenses
CME1056
Additional Maintenance: Air Filter Replacement
Air Filter Replacement - Do Monthly
To Check the Inlet Water Valve Screen.
1. Remove the front panel.
1. Disconnect the electrical power.
2. Remove the top panel.
2. Shut off the water supply.
3. Remove the left and right side panels.
3. Remove the front panel.
4. Remove a screw holding a clip & filter to the left
panel.
4. Unplug the electrical connection of the inlet
water valve.
5. Remove the screws holding the inlet water
valve to the cabinet.
Clip
6. Remove outlet tube from inlet water valve.
Water Valve
Screen
Filter
5. Replace both air filters.
Note: Filter size is 20 x 20 x 1. Use a like
replacement, equal to UL class 2, 377A.
4. Return all panels to their original positions.
Secure them with the original screws.
Inlet Water Valve Screen - Do if water flow
becomes restricted.
The inlet water valve has a screen on its inlet side
to keep debris from flowing into the valve. In some
cases, this screen may become clogged or
restricted by debris build up. Check for the proper
water flow:
7. Rotate inlet water valve from inlet fitting and
remove valve from machine.
Flow rate is 2.7 G.P.M.
Note: Screen is not replaceable, and may only be
removed by taking off the covering bracket. The
bracket forms part of the inlet water system, and
must be water tight to the valve body, removal is
not recommended.
1. Remove front panel.
2. Obtain a measuring cup and a watch.
3. Pull the water discharge tube out of the
reservoir and place it in the cup.
8. Examine the inlet screen, if dirty, brush off
screen.
9. Reverse to reassemble.
4. Push and release the Harvest button.
5. If working properly, the water valve will fill a 16
oz cup in about 3 seconds. Be prepared to push
the Off button. If it does not, the water valve inlet
or other water device is restricted.
May 2000
Page 27
CME1056
Additional Maintenance: Condenser
To Clean the Air Cooled Condenser
1. Remove the front panel.
¼ Turn
Fastener
2. Push and release the Off button.
3. Remove the top panel.
4. Remove the left and right side panels.
5. Replace the air filters.
6. Check the fan blade and condenser for grease
or dust build up.
Removable
Part of
Shroud
Because air flow is from the inside of the cabinet
out, the inside of the condenser fins will have the
most build up.
A. Place the inlet hose of a vacuum cleaner in
the condenser shroud.
B. While the vacuum cleaner is on, blow
compressed air from the back of the condenser
thru the fins.
C. If grease is present, use coil cleaner on the
condenser. Be sure to wipe up any excess coil
cleaner.
7. Additional access can be gained by removing
the top of the fan shroud.
(see page 34)
8. After cleaning, return all panels except the right
front to their original positions.
9. Push and release the Freeze button.
10. Replace the front panel.
Right Side
View of Unit
with Top of
Shroud
Removed.
May 2000
Page 28
¼ Turn
Fastener
CME1056
Service Diagnosis: Controller Diagnostic Light Analysis
Problem or Symptom
Possible Cause
Probable Correction
Machine is off
Bin is full, ice in cube port
Use some ice
Bin full light on, no ice in
cube port
Check optional thermostat, check for scale on
ice sensor lens
Power is off, check lights.
If all lights are out, check power supply,
restore power if off
Optional bin thermostat is
closed
Check thermostat for ice on the bulb. If none,
check adjustment.
Transformer is open
If all lights are out and there is power, check
transformer output for 24 vac
Unit has been switched off
Off lite is glowing
Push and release Freeze button to restart
unit.
Compressor will not start
Not enough water or water not sensed.
Unit has Shut Down
Check for Refrigeration or Water Error
Water inlet valve
malfunction
Check water diagnostic light, if it blinks 2
times and repeats, check the water inlet valve
for proper water flow.**
Water pump malfunction
Check that pump hose is attached and if
pump is plugged in and working.
Water level not sensed or
not high enough
Check harness from sensor.
Low discharge or long
freeze cycle
If the Refrigeration light is glowing steadily,
there is a probable refrigeration problem
Harvest problem
If the Refrigeration light blinks once and
repeats, look for a harvest problem.** This
also indicates that cubes were “sensed” by
the bin controls.
Unit is off & Water
diagnostic light is ON
or BLINKING
Unit is off &
Refrigeration
diagnostic light is ON
or BLINKING
If the lite blinks 2 times and repeats, check for
a harvest error - no cubes sensed.
High Discharge Temp
If the refrigeration diagnostic light blinks 3
times and then repeats, check for a reason for
high discharge temperatures.
Unit does not go into
harvest - exceeds
maximum freeze time
Push and release Off button. Push and
release Freeze button. Check operation.
Exceeds maximum harvest
time
Check for cause of long harvest cycle**
Push cube size float down and check
operation.
* Machine may be reset by pushing and releasing the Off button, then pushing and releasing the
Freeze button. ** See following pages
May 2000
Page 29
CME1056
Service Diagnosis
Problem or Symptom
Possible Cause
Probable Correction
Unit is off because of a Ice sensors did not sense
“Harvest Problem”
ice falling, unit stayed in
harvest until the maximum
harvest time ran out.
Check ice sensors. The bin full light should be
off. If it is on or blinking the bin controls may
be dirty. Clean if dirty. The board and bin
controls may also need to be checked.
Push and release Off button. Push and
release Freeze button. Check machine
operation. Check if ice is made and harvests.
Cubes are too large
Cubes are too small
Low ice capacity
Unit does not shut off
or cannot sense ice
falling
Ice sensors or Controller
may have failed.
See “Unit does not shut off” below.
Other components may
have failed
Check the next page
Cube size control float is
sticking.
Check/clean
Inlet water valve leaks thru
Check water valve
Purge valve leaks thru
Check purge valve
Not enough water
Check for leak in reservoir
Dirty condenser or filter
Replace filters, clean condenser
Recirculation of air
Block air re-circulation or move condenser
Low refrigerant charge
Check system. If there is a low charge, find
the leak, recover the refrigerant, repair the
leak, replace the dryer, evacuate and weigh
in the nameplate charge.
Too much water
Check for inlet water valve leak thru
Ice sensor system may
have failed.
Check ice sensors. Check bin full light, if off,
place something between the electric eyes.
The bin full light should begin to blink (after
20 seconds of continuous blockage it will
glow steadily). If not, check operation of
electric eyes by unplugging #4 and jumping
out the two pins on the controller (first
discharge any static electricity by touching the
cabinet with the tool). If the bin full light blinks,
replace the bin controls. If it does not blink,
replace the controller. Note: Leaving #4
unplugged and jumped for 20 seconds will
shut the machine down on a bin full (at the
end of the harvest cycle). It will restart after 4
minutes or may be reset by pushing the
Freeze button.
May 2000
Page 30
CME1056
Service Diagnosis: Components
Problem or Symptom
Possible Cause
Probable Correction
Fan motor does not
turn. Refrigeration light
may be on steadily or
blinks 3 times and
repeats.
Open motor windings, or
seized bearings
Replace fan motor
No power to fan motor
Fan motor unplugged, check for voltage from
controller. If none, replace controller.
Pump motor does not
turn
Open motor windings, or
seized bearings
Replace pump
No power to pump
Check electrical connections. If the unit is in
Freeze the pump should have power to it. If
not, replace the AutoIQ Controller.
Open solenoid coil.
Replace hot gas valve
Stuck valve
Replace hot gas valve
No power to coil in Harvest
Check wire connections, if ok, replace AutoIQ
Controller
Hot Gas Valve leaks
thru (warm tube
temperatures on both
sides of valve during
freeze)
Mechanical problem in
valve
Replace valve
Water Inlet Valve does
not open
Open solenoid coil
Replace valve
Stuck valve
Replace valve
No power to valve (early
part of harvest)
Check wire connections, if ok, replace AutoIQ
Controller
Water Inlet Valve does
not flow enough water
Restriction in water supply
Check water filters and/or inlet screen.
Water Inlet Valve
leaks thru
Mechanical problem in
valve
Replace valve
Compressor does not
work
Unit in Clean cycle
Push and release Freeze button.
Contactor coil open
Replace contactor
Open starting components
Check and replace
Open windings
Check and replace compressor
Internal valve failure
Replace compressor
Water level too low or not
sensed
Unit must be full of water before controller will
start compressor. Check water level and
sensor and harness.
Hot Gas Valve does
not open.
May 2000
Page 31
CME1056
PTCR Diagnosis
The CME1056 “D” series cubers use a PTCR
(Positive Temperature Coefficient Resistor) in
place of a conventional start relay and start
capacitor.
Diagnosis:
1. Disconnect electrical power.
• Power from the contactor connects to the
PTCR and to the Run Capacitor
• A wire connects the other terminal of the
PTCR to the compressor’s start winding.
• Another wire connects the run capacitor to
the start winding.
• A parallel circuit connects power from the
contactor to the Run winding of the
compressor.
2. Check if the PTCR is cool enough to handle
safely. If not, wait 5 minutes for it to cool off.
3. Disconnect both leads to the PTCR and
measure its resistance with an ohmmeter. If the
PTCR reads less than 22 ohms or more than 40
ohms, replace it.
A PTCR changes resistance sharply when its
temperature changes. When the PTCR is cold, it
connects full current to the compressor’s start
winding. After a very short time, the PTCR heats
up and shuts off the current flow. Under normal
conditions, the PTCR’s case is at about 180oF.
At that temperature the PTCR has very high
resistance and will not allow current to flow. It must
cool down to about 120oF. Before current will pas
through it again.
May 2000
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CME1056
Operational Characteristics: CME1056
Cycle Times (minutes):
Air Cooled
70oF. indoor air, 50oF. water
90oF. indoor air, 70oF. water
Freeze
12 to 14 minutes
16 to 18 minutes
Harvest
2 ½ minutes
1 ½ minutes
Water Cooled
70oF. indoor air, 50oF. water
90oF. indoor air, 70oF. water
Freeze
12 to 14 minutes
13 to 15 minutes
Harvest
2½ -3
2½ -3
Air Cooled
70oF. indoor air, 50oF. water
90oF. indoor air, 70oF. water
Suction: End of Freeze
24 to 30 PSIG
32 to 38 PSIG
Suction: Peak in Harvest
80 to 100 PSIG
105 to 125 PSIG
Discharge: 5 minutes into Freeze
195 to 215 PSIG
255 to 275 PSIG
Discharge: Minimum in Harvest
155 to 175 PSIG
190 to 210 PSIG
Water Cooled
70oF. indoor air, 50oF. water
90oF. indoor air, 70oF. water
Suction: End of Freeze
22 to 28 PSIG
26 to 32 PSIG
Suction: Peak in Harvest
75 to 95 PSIG
80 to 100 PSIG
Discharge:
245
245
Discharge: Minimum in Harvest
160
170
System Pressures (PSIG):
Refrigerant Charge, R-404A
• Air cooled: 44 ounces
• Water cooled: 28 ounces
Typical Harvest Ice Weight
• 9 to 11 lb
Typical Air Cooled Machine Amps
Superheat (near the end of freeze)
• 5 to 15 degrees
Single Phase
Water Cooled:
• Discharge Pressure: 245 PSIG
• Hi Pressure Cuts Out at: 450 PSIG
• 5 minutes into freeze: 10
• Harvest: 10
Three Phase
• 5 minutes into freeze: 7
• Harvest: 7
May 2000
Page 33
CME1056
Removal and Replacement: Water Level Sensor
1. Remove front panel.
Water Temperature Sensor
2. Push and hold the OFF button. Release it when
the machine stops.
Note: This sensor is replaced as a set with the
Discharge Temperature Sensor.
3. Trace wire harness from water level sensor to
the AutoIQ Controller (#2). Unplug the harness
from the controller.
1. Remove left side and front panel.
4. Lift the pump and mounting plate up enough to
remove the float from the stem.
5. Remove two screws holding the sensor to the
pump bracket and lift the sensor up and out of the
machine.
6. Reverse to reassemble.
Float Stem
2. Push and release Off button.
3. Remove 1 plastic bolt and the reservoir cover.
4. Locate water temperature sensor (inserted into
pump discharge hose).
5. Pull out to remove.
6. Trace back to AutoIQ Controller, unplug from
#5.
7. Remove the Discharge Line temperature sensor
(see the next page).
1. Remove the left side and front panels.
8. Reverse to reassemble.
2. Remove the reservoir cover.
3. Pull up on float stem, reach under pump cover
and pull the float off the stem.
4. Pull stem out and reverse to replace.
Observe machine for proper cube size after
replacement of the float stem.
Purge Valve Timer
The purge valve timer is sensitive to electrostatic
discharge. Be certain to touch a grounded surface
before touching this component. Do the same
when handling the replacement part.
1. Touch a grounded surface.
Electric Eyes (Harvest Control Sensors)
2. Remove front panel.
These must be replaced as a set.
3. Disconnect electrical power.
1. Remove front panel.
4. Remove high voltage box cover.
2. Push and release the Off button.
3. Remove evaporator cover.
5. Locate timer board at the bottom of the high
voltage box.
4. Remove water deflector.
6. Unplug all the wires to the board.
5. Remove cascading shield by twisting its bottom
edge up, then lifting it up.
7. Compress each of the four stand-off posts to
release the board from the stand-offs.
6. Reach into cube port area and pull each sensor
in and out of its installed position.
8. Remove the board from the unit.
7. Trace wire back to the controller and unplug.
Reverse to reassemble.
8. Reverse all steps to reassemble.
May 2000
Page 34
CME1056
Removal and Replacement: Fan Blade and/or Fan Motor
1. Disconnect electrical power.
8. Replace the blade or motor as needed.
Electrical Shock Hazard
Disconnect Electrical Power
Before Servicing
2. Remove all panels.
¼ Turn
Fastener
Note: The fan is properly on the motor shaft when
the hub faces the motor and the shaft end is flush
with the hub.
Discharge Line Temperature Sensor
1. Remove front panel, push and release the Off
button.
2. Remove top and left side panels.
3. Locate discharge line sensor. It is attached to
the discharge line of the compressor, 6" from the
compressor discharge port.
3. Remove the 2 ¼ turn screws holding the top
part of the fan shroud to the bottom fan shroud.
4. Unwrap the insulation and un-snap the clip
holding the sensor to the discharge line.
4. Tip the top of the fan shroud forward and pull it
to the right and out of the cabinet.
5. Trace the sensor wires back to the controller,
they are plugged into #5 with the water
temperature sensor, and must be replaced with it.
5. Remove the two brackets holding the fan motor
to its cradle.
6. Un plug the fan motor from the power supply.
7. Pull fan motor and blade out as an assembly.
Bracket
6. Reverse to replace, be sure that the discharge
line sensor is 6" up from the compressor discharge
port. Be sure to re-wrap the insulation.
Note: Route wires so they do NOT contact the
discharge line.
The sensor for the Discharge line is marked
with a small piece of yellow tape. Do not
reverse the sensors.
Evaporators
In the unlikely event that an evaporator may need
to be replaced, do NOT braze the evaporator joints
when the evaporators are seated in the freezing
compartment, instead lift them up slightly so that
the joints to be brazed are above the top edge of
the freezing compartment.
May 2000
Page 35
CME1056
Access Valves
To use the access valves:
C. An HFC type liquid line dryer must be used.
1. Be sure that the valve is closed. Remove the
stem cap and insert a 3/16" allen wrench. Check
that the valve is closed.
D. A nitrogen purge is required when brazing.
2. Remove the port cap and attach refrigerant
manifold hoses.
E. When evacuating, use of an electronic micron
gage is recommend. Evacuate to 300 microns.
F. It must be liquid charged:
1. Place a drum or cylinder of R-404A on the
scale, liquid out side up (check container).
3. Open the valve and purge the hoses.
2. Attach the charging hose to the cylinder of
R-404A. Open the cylinder’s valve and purge the
hose to the manifold.
3. Close the low side service access valve.
4. Open the discharge side manifold valve and
weigh in the name plate charge. After the charge
is weighed in, wait a moment & re-check the
scale.
5. If all of the refrigerant charge has not been
weighed into the discharge side, it must be
carefully added thru the low side. Close the
discharge service access valve.
4. When service is complete, shut the discharge
access valve first. Then, with the machine running
and the middle hose outlet securely fastened to
the manifold or refrigerant tank (closed) open both 6. With a sight glass or charge faster in the hose to
the low side port, start the ice machine.
manifold valves. This allows any liquid refrigerant
in the discharge hose to flow thru the manifold and
7. Open the low side service access valve.
into the suction side.
5. After the gages have equaled, shut the manifold 8. Crack open the low side manifold valve and
watch the scale and sight glass. Open and close
valves and the suction access valve.
the low side manifold valve to flow liquid into the
manifold but flash off to vapor before it enters the
6. Remove the gages and replace the stem and
port caps. Make certain that they are tightly closed. refrigeration system.
Refrigeration System Components
Due to the expected level of training and
experience of a refrigeration mechanic, detailed
instructions regarding the replacement of
refrigeration components will not be presented.
However, critical items will be noted here.
9. After the scale = the correct charge, shut off the
valve on the refrigerant cylinder.
10. With the ice machine running and the
discharge access valve closed, open both manifold
valves to allow the refrigerant in the hoses to enter
the system.
Refrigerant:
11. Shut the suction service access valve.
1. This ice machine uses R-404A or HP62 as a
refrigerant. It has several unique characteristics.
12. Remove the refrigeration manifold gages.
A. It must use polyol ester refrigerant oil, and that
oil is very water absorbent. The system must not
be open for more than 15 minutes.
13. Replace and tighten all caps.
B. An electronic leak detector capable of locating
HFC-134a type refrigerant must be used to locate
refrigerant leaks.
May 2000
Page 36
CME1056
Before Calling for Service
Check the following:
1. Has the water supply to the ice machine or building been shut off? If yes, the
ice machine will automatically restart within 25 minutes after water begins to
flow to it.
2. Has power been shut off to the ice machine? If yes, the ice machine will
automatically restart when power is restored.
3. Has someone shut the water off to a water cooled unit?. If yes, the ice
machine may need to be manually reset.
4. Does the bin control have ice on it? If so, remove the ice and the machine
should start in a few minutes.
To Manually Reset the machine.
1. Remove the front panel.
2. Locate the AutoIQ Controller. If a red
diagnostic light is glowing, note which one
and its blink rate. Then push and release
the off button.
3. Push and release the Freeze button.
4. The machine should begin to operate. If
there is a lack of water it will soon shut off
again.
5. Return the front panel to its normal
position.
If the machine shuts down again, call for
service.
To Shut the Machine Off:
8
9
7
6
5
4
3
PUSH BUTTON
CONTROL SWITCHES
INDICATOR LIGHTS:
BIN FULL
FREEZE
HARVEST
CLEAN
2
1
OFF
DIAGNOSTIC LIGHTS:
WATER
REFRIGERATION
1. Remove the front panel.
2. Locate the AutoIQ Controller.
3. Push and hold the Off button for 3
seconds or until the machine stops.
May 2000
Page 37