Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual page 63

Check method of DC fan motor (fan motor/outdoor multi controller circuit board)
Notes
· High voltage is applied to the connector (CNF1, 2) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNF1, 2) for the motor with the power supply on.
(It causes trouble of the outdoor multi controller circuit board and fan motor.)
Self-check
Symptom: The outdoor fan cannot rotate.
Fuse check
Check the fuse (F5) on outdoor multi
controller circuit board.
Did the fuse blow?
No
Wiring contact check
Contact of fan motor connector
(CNF1, 2)
Is there contact failure?
No
Fan motor check (CNF1, 2)
Is the resistance abnormal?
No
Power supply check (Remove the connector (CNF1, 2))
Measure the voltage in the outdoor controller circuit board.
TEST POINT : V (between 1 (+) and 4 (−) of the fan connector): V
DC
TEST POINT : V (between 5 (+) and 4 (−) of the fan connector): V
CC
Is the voltage normal?
No
Replace the outdoor
controller circuit board.
Check the operation.
Fail
Replace the defective fan motor.
OCH771C
Disconnect the FAN motor
Yes
connector and measure the
resistance of connector pins.
Refer to "10-5. HOW TO
CHECK THE PARTS".
Yes
Correct the wiring.
UNIT
FAN MOTOR
Measuring points
pin 1 - pin 4
pin 5 - pin 4
pin 6 - pin 4
pin 7 - pin 4
Yes
Replace the fan motor.
Yes
Replace the defective fan motor.
Check the operation of fan.
Replace the outdoor controller
circuit board.
OK
Complete.
Is the fan motor normal?
No
Replace the outdoor controller circuit board
(C.B.) and the defective fan motor (MF1, 2).
ZM60-140 ZM200/250
BH61J065 BH61J065
Resistance Resistance
∞ ∞
1.1 kΩ 5.3 kΩ
40 kΩ 220 kΩ
∞ ∞
250–330 VDC
DC
15 VDC
CC
Yes
OK
Fail
63
Yes
Replace the outdoor controller
circuit board (C.B.).
Complete.