517798
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CONTENTS
1 INTRODUCTION ...................................................................................................................5
1.1 Electronics..................................................................................................................
5
1.2 Product Specification..................................................................................................
5
1.2.1 Compressors/Refrigerant Charge..........................................................................
5
1.2.2 Compressor Specification......................................................................................
5
1.3 Condenser Layout......................................................................................................
6
1.4 Suction Line Assembly...............................................................................................
6
1.5 Bottom Step Evaporator.............................................................................................
6
2 ELECTRONICS.....................................................................................................................
6
2.1 Control Module...........................................................................................................
6
2.2 Temperature Controller ..............................................................................................
6
2.3 Temperature Sensors.................................................................................................
6
2.4 Beeper/Alarm .............................................................................................................
7
2.5 Defrost Heater............................................................................................................
7
2.6 FC Fan .......................................................................................................................
7
2.7 Door Reed Switch ......................................................................................................
7
2.8 Defrost Cycle..............................................................................................................
8
2.9 Fault Alarm.................................................................................................................
8
2.10 Compressor Starting ..................................................................................................
8
3 FAULT CODES .....................................................................................................................
8
3.1 Fault Code Table........................................................................................................
8
3.2 To Disable Alarm......................................................................................................
10
3.3 To Manually Force a Defrost....................................................................................
10
4 SERVICE PROCEDURES...................................................................................................
10
4.1 Control Module.........................................................................................................
10
4.2 Compressor Overload ..............................................................................................
10
4.3 FC and Defrost Sensor.............................................................................................
10
4.3.1 To Replace FC Sensor ........................................................................................
10
4.3.2 To Replace Defrost Sensor .................................................................................
11
4.4 Variable Resistor......................................................................................................
11
4.5 FC Defrost Element..................................................................................................
11
4.6 Reed Switch .............................................................................................................
11
4.7 Fan Motor.................................................................................................................
11
5 WIRING DIAGRAM .............................................................................................................
13
6 FAULT FINDING .................................................................................................................
15
6.1 Compressor Won’t Start...........................................................................................
15
6.2 Compressor Starts, Runs and Then Stops...............................................................
15
6.3 Compressor Humming .............................................................................................
15
6.4 Freezer Too Cold .....................................................................................................
15
6.5 Freezer Too Warm ...................................................................................................
15