27
OCH710
Indoor controller board fuse check
Wiring contact check
Contact of fan motor connector (CNMF)
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
Correct wiring.
Replace indoor controller board.
Replace the defective fan motor.
Replace indoor
controller board.
Replace the defective fan motor.
Is the voltage normal?
Is there contact failure?
No
Yes
Yes
No
Check the operation of fan.
Complete.
Fail
OK
OK
Check the operation.
Is the fuse normal?
Yes
Notes
· High voltage is applied to the connector (CNMF) for the fan motor. Pay attention to the service.
· Do not pull out the connecter (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 rotate.
Check method of indoor fan motor (fan motor/indoor controller board)
1
2
Complete.
Replace the defective fan motor.
Replace the indoor controller board.
8-1-3. DC Fan motor (fan motor/indoor controller board)
