55
OCH670
Notes
· High voltage is applied to the connecter (CNF1) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNF1) for the motor with the power supply on.
(It causes trouble of the outdoor controller circuit board and fan motor.)
Self check
Symptom : The outdoor fan cannot turn around.
1
2
Check method of DC fan motor (fan motor / outdoor controller circuit board)
Fail
Fail
Wiring contact check
Contact of fan motor connector (CNF1)
Fuse check
Check the fuse (F5) on outdoor
controller board.
Power supply check (Remove the connector (CNF1))
3
Turn on the breaker to start test run.
TEST POINT
1
: V
DC
(between 1 (+) and 4 (-) of the fan connector): V
DC
250-380 V DC
TEST POINT
2
: V
CC
(between 5 (+) and 4 (-) of the fan connector): V
CC
15 V DC
Recover wiring.
Replace outdoor controller board.
Replace outdoor controller board (C.B)
and fan motor (MF1).
Replace outdoor
controller board.
Is the voltage normal?
Is there contact failure?
Yes
No
Did the fuse blow?
No
Yes
Check the operation of fan.
END
Yes
OK
Check the operation.
END
OK
Yes
No
Replace the defective fan motor
Replace the defective fan motor
TEST POINT
3
: V
SP
(between 6 (+) and 4 (-) of the fan connector): V
SP
6.5 V DC
5
Turn off the breaker and turn off the SW6-3.
2
Disconnect the connector (CNF1).
1
Turn off the breaker and turn on the SW6-3.
4
Measure the voltage in the outdoor controller circuit board.
