• No results found

J Check of power supply

In document SERVICE MANUAL (сторінка 33-37)

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 lights up, OK.

If fl ashes, refer to 11-3.

Does the upper lamp of

OPERATION INDICATOR on the indoor unit light up?

Does 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 bus-bar voltage 325 - 370 VDC between JP715 (+) and JP30 (–) 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 between the compressor and the IGBT module (IC700).

Turn ON the power supply and press EMERGENCY OPERATION switch.

34 Press OPERATE/STOP (ON/OFF) (MSZ-GF60/71VE) /

STOP/OPERATE (OFF/ON) (MSZ-GF60/71VE2)button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. 1 Expansion valve operates in full-opening direction.

OK

NOTE: After check of LEV, do the undermentioned operations.

1. Turn OFF the power supply and turn it ON again.

2. Press RESET button on the remote controller.

1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.

Measure each voltage between connector pins of CN724 on the inverter P.C. board.

1. Pin (-) — Pin (+) 2. Pin (-) — Pin (+) 3. Pin (-) — Pin (+) 4. Pin (-) — Pin (+)

Is there about 3 - 5 VAC between each?

NOTE: Measure the voltage by an analog tester.

Properly fi x the LEV coil to the expansion valve.

Replace the inverter P.C.

board.

Replace the LEV coil.

Replace the expansion valve.

Is LEV coil properly fi xed to the expansion valve?

Does the resistance of LEV coil have the characteristics?

(Refer to 11-4.)

Do you hear the expansion valve "click, click···"?

Do you feel the expansion valve vibrate when touching it ?

Turn ON the power supply.

<Preparation of the remote controller>

While pressing both OPERATION SELECT button and TEMP button on the remote controller at the same time, press RESET button.

First, release RESET button.

Hold down the other 2 buttons for another 3 seconds.

Make sure that the indicators on the LCD screen shown in the right fi gure are all displayed.

Then release the buttons.

Yes No

No

Yes No Yes

No

Yes

K Check of LEV (Expansion valve)

MSZ-GF60VE MSZ-GF71VE

MSZ-GF60VE2 MSZ-GF71VE2

Check the outdoor fan motor.

(Refer to 11-5. .)

Is the fuse (F901) blown on the in- verter P.C. board?

Check the connection of the connectors (CN931, CN932) of the outdoor fan motor.

If the connection is poor, make it correct.

Operate the outdoor unit by starting EMERGENCY OPERATION.

Check the LED indication on the inverter P.C. board.

Does the LED fl ash 10 times?

Replace the inverter P.C. board.

Check the corresponding parts following LED indication.

(Refer to 11-3.) Yes

No

Yes

(10-time fl ash)

No

L Check of inverter P.C. board

36

M How to check miswiring and serial signal error

Turn the power supply OFF.

Is there rated voltage in the power supply?

Yes No

Check for incorrect indoor-outdoor connecting wiring.

Check the power supply.

A

Is there rated voltage between outdoor terminal block S1 and S2?

Check for miswiring, broken wires, and loose wire connection between the power supply and outdoor terminal block S1 and between the power supply and outdoor terminal block S2.

Wait for 2 or more minutes after the power supply is turned on.

Touch S2 and S3 with tester probes and start the emergency operation.

When the emergency operation starts, does the rated voltage occur for 2 sec- onds between indoor terminal block S2 and S3?

No

No No

Was the indoor unit ever connected to the Multi (MXZ) series and operated (turned on)?

The connection information to the Multi series is stored in the indoor unit. Refer to “Deleting the memorized abnormal condition” described in 11-2.1 to clear the error history. When the error history is being cleared, the connection information also will be initialized. The indoor unit will be compatible with a low-standby-power model after initialization.

OK Yes

B Turn the power supply ON.

Yes

• Turn OFF inverter-controlled lighting equipment.

• Turn OFF the power supply and then turn ON again.

• Press EMERGENCY OPERATION switch.

A

Is serial signal error indicated 6 minutes later?

B Yes

• Reinstall either the unit or the light away from each other.

• Attach a fi lter on remote control receiving section of the indoor unit.

No

NOTE: Refer to the indoor unit service manual.

Replace the indoor electronic control P.C. board.

Does the indoor OPERATION INDICATOR lamp (upper) blink continuously 6 minutes after the emergency operation starts?

No Does DC (10 V or more) occur between L68A and L68B on the relay P.C. board?

Yes

Does the outdoor LED blink 6 times?

Yes

Replace the relay P.C. board. 1

No

Does DC (more than 0 V) occur between indoor terminal block S2 and S3?

Yes

Replace the inverter P.C. board. 1 No

Turn the power supply OFF.

Start the emergency operation.

No Repair has been completed.

Replace the inverter P.C. board and the relay P.C. board. 1

1.

Electric charge may remain immediately after the power supply is turned OFF.

Perform the procedure after 3 minutes.

Replace the inverter P.C. board and the relay P.C. board. 1

Turn the power supply ON.

Does the indoor OPERATION INDICATOR lamp (upper) blink continuously 6 minutes after the emergency operation starts?

Yes

No

Replace the indoor electronic control P.C. board.

Yes

Replace the inverter P.C. board and the relay P.C. board. 1 Yes

Has the operation stopped during pump down?

Was the operation started with the stop valve closed, and was it opened during operation?

No Yes

In document SERVICE MANUAL (сторінка 33-37)

СУПУТНІ ДОКУМЕНТИ