Mitsubishi MSZ-HC35VA Service Manual download pdf (Page 35)

35

J Check of power supply

Is there voltage 230 VAC

between the indoor terminal

block S1 and S2?

No

Yes

Replace the indoor

electronic control P.C.

board.

Rectify indoor/outdoor

connecting wire.

Yes

If light up, OK.

If ﬂ ash, refer to 11-3.

Does the upper lamp of OPERATION

INDICATOR lamp on the indoor unit

light up?

Dose LED on the inverter P.C.

board light up or ﬂ ash? (Refer

to 11-6.1.)

No

Replace the inverter

P.C. board.

Is there voltage 280 - 370 VDC

between DB61 (+) and DB61 (–) on

the inverter P.C. board?

(Refer to 11-6.1.)

No

Check the electric parts in main circuit.

Yes

Yes

No

Disconnect the connector (CN61)

between compressor and intelligent

power module.

Turn ON power supply and press

EMERGENCY OPERATION switch.

Inverter P.C. board

(Solder side)

DB61

280 ~ 370 VDC

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