10) Symptom:
LCD on the remote controller displays “CHECK P02”. (Compressor / outdoor fan
protection thermostat operation warning / power supply voltage abnormality)
Y
ES
Yes
No
Yes
No
No
0342_M_I
S
TART
Is the outdoor fan wire winding
protection thermostat (49FO) off?
Replace the outdoor fan.
Replace the outdoor unit PCB.
Correct the connection
Yes
No
No
No
Replace the outdoor unit PCB.
Is there 220-240 V AC between
CN19-9 and CN19-1 on the
outdoor unit PCB?
Yes
Replace the outdoor unit PCB.
Is the high voltage switch
(63 PH) off?
Yes
Replace the fuse.
Is the fuse on the outdoor unit
PCB blown (F1 and F2)?
¥ No refrigerant
¥ High load
¥ 4-way valve defect
¥ Clogged refrigerant circuit
¥ Electronic refrigerant control valve
defect (indoor unit)
Yes
No
Check the power breaker etc.
and repair.
Is the power supply to the outdoor
unit normal?
(Voltage / defective phase?)
36
