22
23
Notes
· High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNMF) for the motor with the power supply on.
(It causes trouble of the indoor controller board and fan motor)
Self check
Conditions : The indoor fan cannot turn around.
Check method of indoor fan motor (fan motor/indoor controller board)
1
2
Indoor controller board fuse check
Wiring contact check
Contact of fan motor connector (CNMF)
No
No
Fail
Power supply check (Remove the connector (CNMF))
Measure the voltage in the indoor controller circuit
board.
TEST POINT
1
: V
DC
(between 1 (+) and 4 (
−
) of the fan connector): V
DC
310–340 V DC
TEST POINT
2
: V
CC
(between 5 (+) and 4 (
−
) of the fan connector): V
CC
15 V DC
Wiring recovery
Replace the drain pump.
Replace the indoor controller board.
Replace the fan motor.
Replace the indoor
controller board.
Replace the fan motor.
Is the voltage normal?
Is there contact failure?
No
Yes
Yes
No
Yes
Check the operation of fan.
END
Fail
OK
END
OK
Check the operation.
Is the fuse normal?
Yes
Is the resistance
between the terminals of
drain pump normal?
Replace the fan motor.
Replace the indoor controller board.
8-2-3. DC Fan Motor (Fan Motor/Indoor Controller Board)
OCH617
