42
I Check of outdoor fan motor
Is the resistance of outdoor fan motor normal?
(Refer to 11-4.)
Replace the outdoor fan motor.
Replace the inverter P.C. board.
No
Yes
Disconnect CN932 from the inverter P.C. board,
and measure the resistance of the outdoor fan
motor.
MUZ-FD25/35
MUZ-FD50
Is the resistance of outdoor fan motor
normal? (Refer to 11-4.)
Disconnect CN932 from the outdoor electronic control
P.C. board, and measure the resistance of the outdoor
fan motor.
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(-)
Does the voltage between each terminal become 5 and 0
VDC repeatedly?
Does the outdoor fan motor rotate smoothly?
Replace the outdoor fan motor.
Replace the outdoor electronic control P.C. board.
Yes
Yes
No
(Fixed to either 5 or 0 VDC)
No
No
Yes
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