Check Of Outdoor Fan Motor - Mitsubishi Electric Mr.Slim MUZ-GC25NA - C1 Service Manual

I Check of outdoor fan motor
MUZ-GC25/35NA
Check the resistance of fan motor. (Refer to
9-4.)
Disconnect the connector CN771 on the
power P.C. board.
Disconnect the connector (CN61) between
compressor and power transistor module.
Turn ON the power supply and press the
EMERGENCY OPERATION switch.
MUZ-GC50/60/71NA
Check the connection between the
connector CN931 and CN932.
Is the resistance between each ter-
minal of outdoor fan motor normal?
(Refer to 9-4.)
No
(Fixed to either 5 or 0 VDC)
Replace the outdoor fan motor.
Is the resistance of
No
fan motor normal?
Yes
Does the upper lamp of
OPERATION
INDICATOR lamp on
the indoor unit light up?
Yes
Disconnect CN932 from outdoor electronic control P.C. board
and turn on the power supply.
Rotate the outdoor fan motor manually and measure the voltage
of CN931.
Between 1(+) and 5(-)
Between 2(+) and 5(-)
Between 3(+) and 5(-)
No
No
Replace the outdoor
fan motor.
After 3 minutes, is
there voltage 220 -
230 VAC between
CN771 and
the power P.C. board?
Yes
Replace the outdoor
fan motor.
Does the voltage between each terminal become 5 and 0
VDC repeatedly?
Does the outdoor fan motor rotate smoothly?
Replace the outdoor electronic control P.C. board.
41
Replace the
No power P.C. board.
on
Yes
Yes