Mitsubishi Electric MXZ-2D33VA Service Manual page 145

• Fan motor does not operate or stops operating shortly after starting the operation.
Check of outdoor fan motor
MXZ-2D33VA/2D40VA/2D42VA/2D42VA2/2D53VA/2D53VA2
MXZ-2D53VAH/2D53VAH2
MXZ-4D83VA/5D102VA
Disconnect CN932 and measure the
resistance of the outdoor fan motor.
Is the resistance of outdoor fan motor
normal? (Refer to 11-5.)
Yes
Turn ON the breaker.
Rotate the outdoor fan motor manually and
measure the voltage of CN931.
Between (+) and (-)
Between (+) and (-)
Between (+) and (-)
Does the voltage between each terminal
become 5 VDC and 0 VDC repeatedly?
Yes
Does the outdoor fan motor rotate smoothly?
Yes
Replace the inverter P.C. board or the outdoor
control P.C. board.
OBH626K
CN931
CN932
No
No
No
Replace the outdoor fan motor.
145
MXZ-2D MXZ-4D83VA/5D102VA
Inverter P.C. board
Outdoor control P.C. board