Black & Decker MUZ-FD12NA- Manuel d'utilisateur télécharger pdf (Page 23)

10-5. TROUBLESHOOTING FLOW

Are the voltages balanced?

Disconnect the connector (CN61) between

compressor and the intelligent power module

(IPM).

Replace the inverter P.C. board.

Check the voltage between terminals.

Check the compressor.

See 10-5. “Check of compressor”.

Yes

See 10-5. “Check of open phase”.

●With the connector between the compressor and the intelligent power module disconnected,

activate the inverter and check if the inverter is normal by measuring the balance of voltage

between the terminals.

Output voltage 115 V

<< Operation method>>

Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the

indoor unit. (TEST RUN OPERATION : Refer to 7-6.)

<<Measurement point>>

at 3 points

BLK (U)-WHT (V)

BLK (U)-RED (W)

WHT(V)-RED (W)

NOTE: 1. Output voltage varies according to power supply voltage.

2. Measure the voltage by analog type tester.

3. During this check, LED of the inverter P.C. board ﬂ ashes 9 times. (Refer to 10-6.1.)

Measure AC voltage between the

lead wires at 3 points.

Refer to 10-5. “Check of compressor

operation time”.

Does the compressor operate continuously?

Refer to 10-5. “Check of compressor start failure”.

OK.

Yes

Refer to 10-5. “Check of compressor

winding”.

Is the compressor normal?

Replace the compressor.

Yes

POWER lamp ﬂ ashes 5-times.

Outdoor unit does not operate.

B Check of open phase

A How to check inverter/ compressor

C Check of compressor

9-time flash

2.5-second OFF

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 35 36

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Black & Decker MUZ-FD12NA- Manuel d'utilisateur Page 23

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