Mitsubishi Electric MSZ-LN-VG Series Service Manual page 117

• Fan motor does not operate or stops operating shortly after starting the operation.
Check of outdoor fan motor
MXZ-2F33VF/2F42VF/2F53VF/2F53VFH
MXZ-2F33VF2/2F42VF2/2F53VF2/2F53VFH2
MXZ-2F33VF3/2F42VF3/2F53VF3/2F53VFH3
Disconnect CN932 and measure the
resistance of the outdoor fan motor.
Is the resistance of outdoor fan motor
normal? (Refer to 12-5.)
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 V DC and 0 V DC repeatedly?
Yes
Does the outdoor fan motor rotate smoothly?
Yes
Replace the inverter P.C. board or the outdoor
control P.C. board.
OBH790D
Connector
CN931
CN932
No
No
No
Replace the outdoor fan motor.
117
MXZ-2F
Inverter P.C. board