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Failure Failure code
Communication failure
F1
Failure of room temperature sensor.
F2
Failure of tube-exit temperature sensor
F3
Failure of tube-entry temperature sensor
F3
Failure of tube-midpoint temperature sensor
F3
Failure of PG fan F4
Fault Fault code
Fault of outdoor unit transducer module
protecting.
P2
Outdoor unit AC input too big.
P3
Outdoor unit compressor exhaust temperature
too high, outdoor environment temperature
ultra warm , compressor outer cover temperature
switch disconnection .
P4
The outdoor machine direct current bus bar
is unusual in voltage.
P7
Fault of lack refrigerant or fault of reversing
valve.
P8
Fault of the outdoor temperature sensor.
F6
Fault of outdoor unit drive, fault of compressor
start.
FC