Submit Your Diagnosis
4 Way Reversing valve bypassing
400/500 series refrigerant large leak
400/500 series refrigerant vapour charged
Capacitor shorted or faulty
CFM seized
CFM windings open
Circuit Breaker tripped
Coil open
Compressor inefficient
Compressor tight (drag/seizing)
Compressor windings or O/L open
Condenser fouled or dirty
Contact burned off
Contact stuck closed
EFM seized
EFM windings open
Electrical phase imbalance (3 phase)
EPRV defective or improperly set
Evaporator airflow high
Evaporator airflow low
Fuse open
Heater open
HPC open
low condensing ambient
low voltage
LPC open or set incorrectly
LLSV coil open
Mixed refrigerants
No faults
No power
No refrigerant
Non-condensables
Oil Separator valve open
Refrigerant overcharge
Refrigerant undercharge
restriction (High Side)
T-Stat open
Thermal Overload open
Transformer open
TXV bulb charge lost
TXV bulb loose
water insufficient
water too warm
winding grounded
wire open
WRV faulty (or set incorrectly)