G G Check Of Outdoor Fan Motor - Mitsubishi Electric MXZ-2A40VA Service Manual

• Fan motor does not operate or stops operating shortly after starting the operation.

G G Check of outdoor fan motor

Check the connection between the
connector CN931 and CN932.
Is the resistance between each terminal
of outdoor fan motor normal?
No
(Fixed to either 5V or 0V DC)
Replace the outdoor DC fan motor.
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
Does the voltage between each terminal become 5V DC and 0V DC
repeatedly?
No
Does the outdoor fan motor rotates smoothly?
Replace the outdoor electronic control P.C. board.
69
Yes
Yes