4
III. Service Diagnosis ........................................................................................................... 25
A. Alarm Signals .............................................................................................................. 25
1. High Temperature Alarm (E1) ................................................................................. 27
2. Low Temperature Alarm (E2) ................................................................................. 28
3. Cabinet Defrost Alarm (E3) .................................................................................... 29
4. High Condenser Temperature Alarm (clogged filter) (E7) ...................................... 30
5. Defrost Thermistor (cabinet) Malfunction Alarm (E8)............................................. 31
6. Condenser Thermistor Malfunction Alarm (E9)...................................................... 32
7. Control Board Alarms (EA and ED) ........................................................................ 33
B. Service Chart .............................................................................................................. 33
1. No Operation .......................................................................................................... 33
2. Cabinet Cooling ..................................................................................................... 34
3. Rail Cooling ........................................................................................................... 36
4. Cabinet Defrost ..................................................................................................... 37
5. Other ...................................................................................................................... 38
IV. Removal and Replacement of Components ................................................................... 39
A. Service for Refrigerant Lines ....................................................................................... 39
1. Refrigerant Recovery ............................................................................................. 39
2. Brazing .................................................................................................................. 40
3. Evacuation and Recharge (R-404A) ...................................................................... 40
B. Removal and Replacement of Refrigeration System Cartridge ................................... 42
1. Refrigerant Recovery Procedure ............................................................................ 42
2. Refrigeration System Pump-Down Procedure ...................................................... 44
C. Removal and Replacement of Compressor ................................................................ 47
D. Removal and Replacement of Cabinet Evaporator ..................................................... 48
E. Removal and Replacement of Expansion Valve .......................................................... 49
F. Removal and Replacement of Liquid Line Valve .......................................................... 50
G. Removal and Replacement of Condenser .................................................................. 51
H. Removal and Replacement of Thermistors and Thermostat ....................................... 52
1. Cabinet Thermistor ................................................................................................. 52
2. Defrost Thermistor ................................................................................................. 52
3. Defrost Thermostat ................................................................................................ 53
4. Rail Thermistor ...................................................................................................... 53
5. Condenser Thermistor (clogged filter) ................................................................... 54
I. Removal and Replacement of Defrost Heater .............................................................. 54
J. Removal and Replacement of Fan Motors ................................................................... 55
1. Cabinet Fan Motor .................................................................................................. 55
2. Condenser Fan Motor ............................................................................................ 56
3. Rail Fan Motor ....................................................................................................... 56
K. Removal and Replacement of Door Gasket ................................................................ 57
L. Door Re-Hinging and Drawer Conversion ................................................................... 57
V. Cleaning and Maintenance Instructions ........................................................................... 58
A. Cleaning ...................................................................................................................... 58
1. Work Surface .......................................................................................................... 58
2. Rail and Rail Cover ................................................................................................ 59
3. Exterior .................................................................................................................. 59
4. Cabinet Interior ...................................................................................................... 59
Summary of Contents for HPR100A
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