4
5. Guarded Access Menu .......................................................................................... 20
a) Temperature Setpoint ....................................................................................... 20
b) Defrost Frequency ............................................................................................ 20
c) Temperature Display Scale (°F or °C) .............................................................. 21
6. Service Menu ........................................................................................................ 22
E. Compressor Thermal Overload and Short Cycle Protection ........................................ 23
F. Perimeter Heater .......................................................................................................... 23
G. Thermistors ................................................................................................................. 23
III. Technical Data ................................................................................................................ 24
A. Wiring Diagrams .......................................................................................................... 24
1. RH_-SSE-XX (FG, HG, FS, or HS) Models ........................................................... 24
2. PTR_SSE-XXXX (FSFS, HSHS, FGFG, HGHG, HGHS) Models ......................... 25
IV. Service Diagnosis ........................................................................................................... 26
A. Diagnostic Procedure .................................................................................................. 26
B. Control Board Check ................................................................................................... 29
C. Thermistor Check ........................................................................................................ 30
D. Diagnostic Chart ......................................................................................................... 31
1. Unit Not Cooling ..................................................................................................... 31
2. Evaporator is Frozen Up ........................................................................................ 33
3. Defrost Fails to Terminate ...................................................................................... 33
4. Other ...................................................................................................................... 33
V. Removal and Replacement of Components .................................................................... 34
A. Service for Refrigerant Lines ....................................................................................... 34
1. Refrigerant Recovery ............................................................................................. 34
2. Brazing .................................................................................................................. 35
3. Evacuation and Recharge (R-134a) ...................................................................... 35
B. Removal and Replacement of Compressor ................................................................. 36
C. Removal and Replacement of Compressor Electronic Unit ........................................ 37
D. Removal and Replacement of Expansion Valve .......................................................... 38
E. Removal and Replacement of Evaporator ................................................................... 39
F. Removal and Replacement of Evaporator Fan Motor .................................................. 40
G. Removal and Replacement of Door Gasket ............................................................... 40
H. Removal and Replacement of Door Closure Spring ................................................... 41
I. Door Re-Hinging ........................................................................................................... 42
J. Removal and Replacement of Control Board ............................................................... 42
K. Removal and Replacement of Thermistors ................................................................. 43
VI. Cleaning Instructions ...................................................................................................... 44
