82 Part Number 000015433_05 3/21
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
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