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Mitsubishi Electric TRANE CITY MULTI TPMFYP006BM140F Technical & Service Manual page 26

Split-type, heat pump air conditioners
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8-2. FAN MOTOR CHECK
Check method of indoor fan motor (fan motor/controller board)
Notes
1
· High voltage is applied to the connector (CNMF1, 2) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNMF1, 2) for the motor with the power supply on, doing so may result in damage
to the board.
(CNMF1, 2)
TPMFYP006BM140F
TPMFYP012BM140F
Self check
Symptom: The indoor fan cannot rotate.
2
Indoor controller board fuse check
Is the fuse normal?
Yes
Wiring contact check
Contact of fan motor connector (CNMF1,2)
Is there contact failure?
No
Turn ON the power supply.
Power supply check
Check the voltage of the indoor
Approx. 294~325V DC between the connecter < (FAN) 1 (+) and 3 (–) > < (CNMF1)1(+) and (CNMF2)1(-) >
Is the voltage normal?
No
Replace the indoor controller board.
Check the operation.
NG
Replace the defective fan motor.
OCHT341
TPMFYP008BM140F
TPMFYP015BM140F
Is the resistance
between the terminals of
drain pump normal?
No
Replace the drain pump.
Yes
Correct the wiring.
controller board with the connector
Yes
Replace the the indoor controler board.
OK
Complete.
Is the fan motor normal?
No
Replace the indoor controller board
and the defective fan motor.
connected to the board.
(CNMF1, 2)
Replace the defective fan motor.
Check the operation.
NG
26
Replace the indoor
controller board.
OK
Complete.

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