Service manual

1
GB
Error marks on unit
display
Fault Corrective Actions
P2
Transducer module protection - auto restart
Over current protection of inverter module.
Over voltage protection of inverter module.
High temp. Protection of inverter module.
P3
Over current
Over load (outdoor ambient temp. More high).
Voltage over lo�.
P4
Discharge temperature of compressor overheat,
ambient temperature overheat
Add Refrigerant
Outdoor ambient temp. Too high, if (t<-4
o
F,t>131
o
F), it �ill alarm.
Temp. S�itch of compressor cut off.
Communication interfere. (Earth �ire can’t �ith
communicate �ire in same cable)
Check Cable.
P7
Dc voltage of outdoor unit abnormal
PFC board fault. Change PFC Board
Communication of main board and pfc board
fault
Check Wires Of Main Board
And Pfc Board.
P8
Leakage or reverse valve fault
Less refrigerant. Add Refrigerant
Coil pipe sensor can’t contact �ith coil pipe.
4-Way valve fault. Change 4-�ay Vavle Fault.
F1
Communicate �ire cut off ,loose or �rong �iring Check Wires
Communication interfere
Check Wires Connection
With Circuit Diagram.(Earth
Line Must Be Wired)
F2 Temp. Sensor of indoor room short or cut off. Change Sensor
F3
Temp. Sensor of indoor coil pipe outlet /
entrance / middle short or cut off.
Change Sensor.
F4
Pg motor fault Change Motor. Pg.
Fixed scre� loose. Fix Cross Flo� Fan.
Communication interfere. (Earth �ire can’t �ith
communicate �ire in same cable)
Check Cable.
F6
Outdoor sensor fault
Temp. Sensor of discharge / suction / condenser
short or cut off
Change Sensor.
FC Compressor drive fault FC