Mitsubishi Electric MSZ-HJ35VA-E1 Service Manual download pdf (Page 35)

Check the resistance of fan motor. (Refer to

11-4.)

Is the resistance of

fan motor normal?

Replace the outdoor

fan motor.

Disconnect the connector CN771 on the

inverter P.C. board.

Disconnect the connector (CN61) between

compressor and power transistor module.

Turn ON the power supply and press the

EMERGENCY OPERATION switch.

Does the upper lamp of

OPERATION

INDICATOR lamp on

the indoor unit light up?

After 3 minutes, is

there voltage 230 VAC

between CN771

and

on the inverter P.C.

board?

Replace the outdoor

fan motor.

Replace the inverter

P.C. board.

Yes

I Check of outdoor fan motor

MUZ-HJ25VA MUZ-HJ35VA

MUZ-HJ50VA

Is the resistance between each ter-

minal of outdoor fan motor normal?

(Refer to 11-4.)

Disconnect CN932 from the inverter 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(-)

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 inverter P.C. board.

Yes

(Fixed to either 5 or 0 VDC)

Yes

Disconnect the connectors CN931

and CN932 from the inverter P.C.

board.

Check the connection between the

connector CN931 and CN932.

OBH648A

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Mitsubishi Electric MSZ-HJ35VA-E1 Service Manual Page 35

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