9.0 DIAGNOSTICS & TROUBLESHOOTING
9.13 Troubleshooting Tips
SYSTEM
PROBLEM
Overcharge
Undercharge
Liquid Restriction
(Drier)
Dirty Outdoor Coil
Low Outdoor
Ambient Temperature
Compressor
Indoor Suction
Pressure Transducer
Faulty Measurement
Poorly Insulated
Indoor Vapor Line
Thermistor
SYSTEM
PROBLEM
Overcharge
Undercharge
Liquid Restriction
(Drier)
Dirty Indoor Coil
Low Indoor Ambient
Temperature
Compressor
Outdoor Suction
Pressure Transducer
Faulty Measurement
Poorly Insulated
Outdoor Suction Line
Thermistor
72
COOLING MODE
TROUBLESHOOTING TIPS
DISCHARGE
SUCTION
PRESSURE
PRESSURE
HEATING MODE
TROUBLESHOOTING TIPS
DISCHARGE
SUCTION
PRESSURE
PRESSURE
INDICATORS
SUPERHEAT
SUBCOOLING
Normal: 5°–15°F
[-15° – -9°C]
Charging Chart
INDICATORS
SUPERHEAT
SUBCOOLING
Normal: 5°–15°F
[-15° – -9°C]
Charging Chart
Normal: See
Normal: See