Mitsubishi Electronics MUY-D30NA, MUZ-D36NA, MUY-D36NA, U1, MUZ-D30NA service manual Led

The left lamp of OPERA-

LED indication (Out-

Indoor/outdoor

Abnormal point

door P.C. board)

TION INDICATOR lamp

Condition

Correspondence

unit failure mode

(Failure mode / protection)

(Indoor unit)

recall function

LED 1

LED 2

Converter

5 times

Goes out

A failure is detected in the operation of the converter dur-

• Replace the power board.

ing operation.

Bus-bar voltage

5 times

Goes out

The bus-bar voltage exceeds 400 V or falls to 200 V or

(1)

below during compressor operating.

11-time flash

—

Bus-bar voltage

(2)

Even if this protection stop

The bus-bar voltage exceeds 400 V or falls to 50 V or

is performed continuously 3

6 times

Goes out

below during compressor operating.

times, it does not mean the

abnormality in outdoor power

system.