Tech Tips
Heat Pump Symptoms
cooling mode
HP0006

Freezing of Indoor Coil	Unit Goes Into Defrost (During Cooling Operation)
Tripping of High Pressure Switch	High Liquid Pressure/Low Subcooling
Unit Running in Heat Mode	High Liquid Pressure/High Subcooling
Compressor Runs But Does Not Pump	High Suction Pressure/Low Liquid Pressure
Compressor Tries to Start But Does Not	Low Suction Pressure/Low Superheat (Fixed Metering Device)
Freezing of Suction Line	Low Suction Pressure/Normal Superheat (TXV)
Low Suction Pressure/High Superheat	High Suction Pressure/High Superheat
Odor and/or "Green Slime" in Refrigeration System	Unit Pumps Into Vacuum