Tech Tips
Heat Pump Symptoms
(1.5 - 5 ton) Cooling Mode
Freezing of Indoor Coil
High Liquid Pressure / Low Subcooling
Tripping High Pressure Switch
High Liquid Pressure / High Subcooling
Unit Running in Heat Mode
High Suction Pressure / Low Liquid Pressure
Compressor Runs but Does Not Pump
Low Suction Pressure / Low Superheat (fixed metering device)
Compressor Tries to Start But Does Not
Low Suction Pressure / Normal Superheat (TXV)
Freezing of Suction Line
High Suction Pressure / High Superheat
Low Suction Pressure / High Superheat
Unit Pumps into Vacuum
Odor and/or "Green Slime" In Refrigeration System
High Suction Pressure / Low Superheat
Unit Goes into Defrost (during cooling operation)