Manitowoc RF1200W, Technician'S Handbook

Page: 162 / 252

162
Par
t Number
00000766
1 6/13
THERMOSTATIC EXPANSION VALVE MODELS
If the gear motor and/or compressor are not energized refer to Electrical Troubleshooting
Refer to Operational Pressure Charts for normal pressures and temperatures
Low on
Refrigerant
Overcharge
of
Refrigerant
Non
Condensible In
System
Liquid Line Restriction,
Suction Line Restriction,
Or Expansion Valve
Starving
Flooding Expansion
Valve or Loose Sensing
Bulb (when used)
Discharge Pressure Low High High Low High
Suction Pressure Low High High Low High
Evaporator Inlet
Temperature
Normal
Normal or
Low
High Normal Normal or High
Evaporator Outlet
Temperature
High Normal High
High > 12° Differential
between Inlet and Outlet
< 10° Differential
between Inlet and Outlet
Discharge Line
Temperature
High Normal
High
Increases With
Run Time
High
Increases With
Run Time
Low
Decreases With Run
Time