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Mitsubishi Electric Mr. Slim MUZ-D30NA Service Manual

Download Service manual of Mitsubishi Electric Mr. Slim MUY-D30NA Air Conditioner for Free or View it Online on All-Guides.com. This version of Mitsubishi Electric Mr. Slim MUY-D30NA Manual compatible with such list of devices, as: Mr. Slim MUY-D30NA, Mr. Slim MUY-D36NA, Mr. Slim MUZ-D30NA, Mr. Slim MUZ-D36NA

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Is the resistance between each ter-

minal of outdoor fan motor normal?

(Refer to 10-4.)

Check the connection between the

connector CN931 and CN932.

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(-)

Does the voltage between each terminal become 5 VDC

and 0 VDC repeatedly?

Does the outdoor fan motor rotate smoothly?

Replace the outdoor DC fan motor. Replace the outdoor electronic control P.C. board.

Yes

Yes

No

(Fixed to either 5 or 0 VDC)

No

No

Yes

Is there voltage of 208/230 VAC in the power

supply terminal block?

Check the connecting of parts of main power

supply circuit.

Check the power supply cable.

Turn ON power supply.

Is the output voltage from the noise fi lter P.C.

board 208/230 VAC?

Replace the noise fi lter P.C. board.

No

Yes

No

Yes

Is the input voltage to the power board

208/230 VAC?

Replace the reactor.

No

Yes

Is the input voltage to the outdoor electronic

control P.C. board 294/325 VDC?

Replace the power board.

No

Replace the outdoor electronic control P.C. board.

Yes

D Check of outdoor fan motor

E Check of power supply