Mitsubishi Electronics MUZ-GB50VA service manual Operational procedure

Models: MUZ-GB50VA

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2. Flow chart of the detailed outdoor unit failure mode recall function

Operational procedure

The outdoor unit might be abnormal.

Confirm if outdoor unit is abnormal according to the following procedures.

Confirm that the remote controller is in the failure mode recall function.

With the remote controller headed towards the indoor unit, press TOO COOL or TOO WARM button to adjust the set temperature to 25:. W1

Does left lamp of OPERATION INDICATOR lamp

No

on the indoor unit blink at the interval of 0.5 seconds?

(OFF)

Blinks: The outdoor unit is abnormal.

 

Beep are emitted at the same

 

timing as the blinking of the left lamp of

 

OPERATION INDICATOR lamp. W2

 

 

Yes

 

 

 

 

(Blinks)

 

The outdoor unit is abnormal.

Check the blinking pattern, and confirm the abnormal point with the outdoor unit failure mode table (Refer to 10-2.3.).

Make sure to check at least two consecutive blinking cycles. W2

Releasing the failure mode recall function

W1. Regardless of normal or abnormal, 2 short beeps are emitted as the signal is received.

The outdoor unit is normal.

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again.

Press RESET button of the remote controller.

Release the failure mode recall function according to the left mentioned procedure.

Repair the defective parts.

Deleting the abnormal memorized condition

1After repairing the unit, recall the failure mode again according to

"Setting up the failure mode recall function" mentioned above.

2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit.

3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.

4Release the failure mode recall function according to "Releasing the failure mode recall function" mentioned above.

Note1. Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly. 2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

W2.Blinking pattern when outdoor unit is abnormal:

 

 

 

 

 

 

 

 

Blinking at 0.5-

 

 

 

 

 

 

 

 

Blinking at 0.5-

 

 

 

2.5-second OFF

3-second ON

 

 

second interval

 

 

 

2.5-second OFF

3-second ON

second interval

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No beep

 

 

 

 

 

 

Beeps

 

 

 

 

 

No beep

 

 

 

 

Beeps

 

 

 

 

 

Repeated cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repeated cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repeated cycle

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Mitsubishi Electronics MUZ-GB50VA service manual Operational procedure