Master-Bilt Master Controller Quick Quick Reference Guide

Master-Bilt Master Controller Quick Quick Reference Guide
Advanced Master Controller 3.2 Setting Quick Reference Guide
(MB P/N: 19-14282 with Pressure Transducer. Revised December 2017)
NOTE: If you are replacing an Advanced Master Controller 2.0 control board in a walk-in cooler or freezer
with either air, electric or reverse cycle defrost, please see the list of typical set points on page 4. The
chart shows the correct settings to follow for each defrost type.
Setting the Advanced Master Controller 3.2 by On-Board Pushbuttons: Up arrow,
Down arrow, Left arrow, Right arrow, Enter, Back.
CHANGING ALL SET POINTS
Press the Left arrow or Right arrow until the display reads ‘STPT’. Press Enter. If the display shows ‘PSWD’ you need to
enter the password. Press Enter. Use the Up and Down arrows to increment or decrement the blinking digit. Use the Right
and Left arrows to move the blinking digit to the right or left. Enter the password ‘0002’. Press and hold the Enter button
until the display shows one of the set points (about 3 seconds). Press the Enter and Back to toggle between the set point
name and the set point value. Press the Up or Down arrows to scroll through the list of set points. To change a set point,
have the display show the value of the set point. Hold Enter until one of the digits starts blinking (about 3 seconds). Use the
Up and Down arrows to increment and decrement the digit. Use the Right and Left arrows to move the blinking digit right or
left. When the new value is displayed, press and hold Enter until all digits stop blinking (about 3 seconds). Press Back, 3
times at any time to leave set point mode
CLEARING AN ALARM
Press the Left arrow or Right arrow until the display reads ‘MNMD’. Press Enter. If the display shows ‘PSWD’ you need to
enter the password. Press Enter. Use the Up and Down arrows to increment or decrement the blinking digit. Use the Right
and Left arrows to move the blinking digit to the right or left. Enter the password ‘0002’. Press and hold the Enter button
until the display shows one of the manual modes (about 3 seconds). Press the Up or Down arrows to scroll through the list of
manual modes until the display shows ‘ALST’. Press Enter. Display shows ‘CLAL’. Press and hold Enter until the display
changes (about 3 seconds). Press Back, 3 times at any time to leave manual mode.
MANUAL DEFROST
Press the Left arrow or Right arrow until the display reads ‘MNMD’. Press Enter. If the display shows ‘PSWD’ you need to
enter the password. Press Enter. Use the Up and Down arrows to increment or decrement the blinking digit. Use the Right
and Left arrows to move the blinking digit to the right or left. Enter the password ‘0002’. Press and hold the Enter button
until the display shows one of the manual modes (about 3 seconds). Press the Up or Down arrows to scroll through the list of
manual modes until the display shows ‘MCTL’. Press Enter. Display shows current system mode (REFR, OFF, DEFR,
DRAN, FNDL). Press and hold Enter until the display changes to next system mode (about 3 seconds). System needs to be
in REFR or OFF mode to go to DEFR or defrost mode. Press Back, 3 times at any time to leave manual mode.
STATUS, DEFAULT AND READING DISPLAY
The status and the digital data can be displayed on the onboard display. Below is a list of the parameters of the operational
status.
Onboard
Display
Description
STUP
CKFN
CKP1
OKP1
CKT1
OKT1
CKT2
OKT2
CKT3
Indicates the status of Start Up Mode
Check fan working status. The fans run than stop during start-up mode
Check pressure transducer
Indicates the pressure transducer is working as it should
Check sensor TS1, sensor the evaporator suction outlet/fan cut-in temperature sensor
Indicates the TS1 is working as it should
Check sensor TS2, the refrigerated room temperature
Indicates the TS2 is working
Check sensor TS3, the evaporator inlet/defrost termination temperature sensor
1
OKT3
CKFH
FNDL
FDTP
COOL
OFF
PMDN
DEFR
DRAN
DFTP
Indicates the TS3 is working
Indicates all sensors are OK
Indicates FAN DELAY MODE
Actual TS1 value in FAN DELAY
Indicates COOL MODE
Indicates OFF MODE
Indicates PUMPDOWN MODE before an electric defrost
Indicates DEFROST MODE
Indicates COIL DRAIN MODE
Inlet sensor TS3 value in DEFROST MODE
CHANGING PARAMETERS
A list of the parameters that can be displayed and/or changed is shown below when access to the default settings is needed.
This access is usually done by a trained technician.
Onboard
Display
Description
RMTP
VALV
SUPH
TSAT
TSUC
TCOI
PRES
Refrigerated room temperature from TS3 (-60oF to +150oF), displayed value
Percentage the valve is open (0 to 99%)
Actual superheat in COOL MODE (TOUT-TSAT)
Saturated suction temperature calculated from suction pressure PRES
Evaporator suction outlet temperature from TS1
Temperature read from the evaporator defrost termination sensor TS3
Suction pressure read from the pressure transducer (-14.6 to 135.5 PSIG)
Note:
MEVM
ALTN
SYNC
Note:
SHSP
RMSP
MXDT
DTSP
PMDN
DRAN
DFPD
HITA
HIDL
LOTA
MOTM
MRTM
ADIF
MOP
MNPR
INTV
DFMD
REFT
ALSP
the above parameters are status variables that allow you to check the system operations;
the below parameters are set points that can be changed to fit the applications
Multi Evaporator Mode options are synchronous mode or alternating mode
Indicates controller is in alternating mode after bonding
Indicates controller is in synchronous mode after bonding
If no bonding is made, the controller works as stand alone
Superheat set point (5 to 30 oF).
Room temperature set point or cut-out (-50 to +90 oF)
Maximum defrost duration (0 to 90 minutes)
Defrost termination temperature (35 to 90oF)
Pump down timeout duration (0 to 5 minutes)
Drip time duration (0 to 15 minutes)
Number of defrosts per day (0 to 8). When DFPD = 0, demand defrost, when DFPD = 1 to 8,
the controller uses scheduled defrost
High temperature alarm offset from room set point RMSP (0 to +99oF)
Temperature alarm delay (0 to 120 minutes)
Low temperature alarm offset from room set point RMSP (0 to +20oF)
Minimum time the valve is close (0 to 15 minutes)
Minimum time the valve is open (0 to 15 minutes)
Cut-in temperature differential (0 to +25 oF)
Maximum suction pressure set point (-10 to 135 PSIG)
Minimum pressure set point (-14 to 100 PSIG)
When in demand defrost and temperature set point is below 35°F, maximum amount of time between
defrosts (480 to 4320 minutes)
Defrost type (electric, air or reverse cycle, ELEC, AIRD and HGDF)
Refrigerant type, R404 (404A) or R22 (R22)
If in alternating mode, number of degrees above cut-in (cut-out + ALSP) set point to
override and both controllers to go into cool mode (0-25oF)
2
ALARM DISPLAY
Any alarm will cause relay #3 to switch. All alarms have a distinct display on the controller. The red LED will be on for a
pressure sensor alarm or TS1, suction temperature sensor alarm. The amber LED will be on for all other alarms. Multiple
alarms can exist. There is a priority as to which alarm will be displayed before another.
Onboard
Display
NOAL
PRSA
STSA
ATSA
LOSH
HITA
LOTA
CTSA
LPRA
COMA
Description
PRIORITY
Displays when there are no alarms. The onboard display will display
status and temperature readings
Pressure transducer
Evaporator outlet temperature sensor TS1 alarm
Room temperature sensor TS2 alarm
Low superheat alarm
High room temperature alarm
Low room temperature alarm
Defrost termination sensor TS3 alarm
Low pressure alarm
Communication alarm
1
2
3
4
5
6
7
8
9
TROUBLESHOOTING GUIDE
Trouble, Alarm Codes
Causes
Corrective Actions
Pressure transducer alarm
PRSA
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Bad transducer
Out of range
Loose wire
Wrong hook-up
Mechanical damage
Connection wire loose
Overheated
Out of range
Mechanical damage
Connection wire loose
Overheated
Out of range
Superheat setting too low
Wrong locations of TS2
Sensors may be loose
Uneven feeding of coil circuits
Overcharge of refrigerant
Defective electric expansion valve (EEV)
• Compressor stops
•
•
•
•
•
•
•
•
•
Outlet sensor TS2 fails
SCSA
Room sensor TS3 fails
ATSA
Low superheat
LOSH
High room temperature
HITA
Low room temperature
LOTA
Defrost termination sensor TS1 fails
CTSA
Low pressure alarm
LPAL
Communication
COMA
•
•
•
•
•
•
•
•
•
•
•
•
Insufficient refrigeration
Heat load too large
Compressor fails or high pressure cuts out
Evaporator fans may not run
Door open for too long
Coil iced-up
Inproper low temp setpoint
Over designed system
Mechanical damage
Loose connection wire
Overheated
Out of range
•
•
•
•
Refrigerant leak
Bad transducer
Loose RJ-45 coonection
Failed communication port
3
Replace the pressure transducer
Turn off power for a few seconds, turn back on
Toghten the connections
Wire correctly
Replace the sensor
Tighten the connection wires
When brazing suction line, take out the sensor
Install the sensor after brazing
Tighten the connection wires on the controller
terminal
• The room sensor can be replaced by surface sensor
• Change to correct set point
• Make sure the distributor is feeding each circuit
evenly
• Insulate the sensors with foam tape
• Use correct refrigerant charge
• Check EEV wiring
• Replace defective EEV
• Check compressor
• Check system design to select a sufficient system
• Replace failed compressor
• Fix the evaporator fans
• Keep the cold room door closed during refrigeration
• Check possible air leak through the walls of cold
room
• Change low temp set point
• Re-select the system
• Tighten the connection wires on the controller
terminal
• Let the sensor cool down to application temperature
range: –50oF to +103oF
• Replace failed sensor
• Fix leak
• Replace pressure transducer
• Replace connector
• Change a new controller board
Temperature Sensor
The resistance of the temperature sensor at 32oF ice water is 5,122 ohms.
Pressure Transducer
RED --- +5VC, Green --- Signal Voltage, Black --- Ground; Compare gauge pressure and the
“PRES” suction pressure on-board reading to make sure they both read the same (PSIG)
Electric Expansion Valve
1) The resistance between the black and white leads should be around 90 ohms. The resistance between
the black and red leads should be an open.
2) The resistance between the red and green leads should be around 90 ohms. The resistance
between the white and green leads should be an open.
3) The resistance between each lead and the brass housing of the valve should be an open
4) Read the AC, not DC, voltage across the black and white leads while the valve is
moving. The AC voltage should be 11 to 13 VAC. The voltage will be close to 0 VAC when the valve
is not moving.
5) Repeat step 4 across the red and green leads
TYPICAL SET POINTS FOR CONTROLLER
Air/Electric Defrost
Reversing Cycle Defrost
RMSP
ADIF
MRTM
MOTM
MNPR
MOP
DFPD
Low Temp
-10
5
2
2
0
55
0
High Temp
35
3
2
2
0
80
0
Low Temp
-10
5
2
2
0
55
0
High Temp
35
3
2
2
0
80
0
INTV
DTSP
MXDT
DRAN
MEVM
720
75
35
2
ALTN
1440
45
35
2
ALTN
720
60
20
5
ALTN
1440
60
20
2
ALTN
15
59
15
25
59
10
15
59
15
DFMD
ALSP
HITA
HITD
LOTA
REFR
SHSP
ELEC
5
25
59
10
449A
10
ELEC
5
449A
10
RCD
5
449A
10
RCD
5
449A
10
Please check with factory for actual set points on individual controllers.
For complete information, please refer to the Master Controller 3.2 Installation & Operations Manual or contact:
Master-Bilt Products
Technical Service Department
Highway 15 North
New Albany, MS 38652
Phone: 800-684-8988
Fax: 800-882-7629
Email: service@master-bilt.com
4
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