Mitsubishi MSZ-HC35VA Service Manual download pdf (Page 32)

Refer to 11-5. “Check of compressor

operation time”.

Does the compressor operate continuously?

Refer to 11-5. “Check of compressor start failure”.

OK.

Yes

Refer to 11-5. “Check of compressor

winding”.

Is the compressor normal?

Replace the compressor.

Yes

C Check of compressor

D Check of compressor winding

E Check of compressor operation time

● Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance be-

tween the compressor terminals.

<<Measurement point>>

At 3 points

BLK-WHT

BLK-RED

WHT-RED

<<Judgement>>

Refer to 11-4.

0 [Ω] ················Abnormal [short]

Infinite [Ω] ·······Abnormal [open]

NOTE : Be sure to zero the ohmmeter before measurement.

Measure the resistance between the lead wires at 3 points.

● Connect the compressor and activate the inverter. Then measure

the time until the inverter stops due to over current.

<<Operation method>>

Start heating or cooling operation by pressing EMERGENCY

OPERATION switch on the indoor unit.

(TEST RUN OPERATION: Refer to 8-3.)

<<Measurement>>

Measure the time from the start of compressor to the stop of

compressor due to overcurrent.

Compressor starts

Abnormal

(IPM failure)

(Compressor winding short)

Abnormal

(Compressor lock out)

(Starting defect)

Abnormal

(Poor contact,)

(Outdoor P.C. board defect)

(Disconnected connector)

Abnormal

(Refrigerant circuit defect)

(Closed valve)

Normal

0 second

1 second

2 seconds

10 seconds

10 minutes

<<Judgement>>

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Mitsubishi MSZ-HC35VA Service Manual Page 32

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