25
8-2. TROUBLESHOOTING
Notes
· High voltage is applied to the connecter (FAN)(CNMF1, 2) for the fan motor. Pay attention to the service.
· Do not pull out the connector (FAN)(CNMF1, 2) for the motor with the power supply on, doing so may result in damage
to the board.
(FAN)
PMFY-P20/25/32/40VBM-E PMFY-P20/25/32/40VBM-E
1
(CNMF1, 2)
PMFY-P20/25/32/40VBM-E#2 PMFY-P20/25/32/40VBM-ER3 PMFY-P20/25/32/40VBM-ER4
Self check
Symptom : The indoor fan can not rotate.
Turn ON the power supply.
Power supply check
Check the voltage of the indoor
controller board with the connector (FAN)
(CNMF1, 2)
connected to the board.
Approx. 310~340V DC between the connecter < (FAN)
(+) and
(–) > < (CNMF1)
(+) and (CNMF2)
(-) >
Check method of indoor fan motor (fan motor / controller board)
Replace the indoor controller board.
Is the voltage normal?
Yes
No
Indoor controller board fuse check
Wiring contact check
Contact of fan motor connector (FAN) (CNMF1,2)
No
No
Wiring recovery
Replace the drain pump.
Is there contact failure?
No
Yes
Yes
Is the fuse normal?
Yes
Is the resistance
between the terminals of
drain pump normal?
Replace the fan motor.
Replace the indoor controller board.
NG
Replace
the fan motor.
Replace the the indoor controler board.
END
OK
Check the operation
NG
Replace the fan motor.
END
OK
Check the operation
OC307E
