Mitsubishi PLA-RP Service Manual download pdf (Page 63)

TROUBLESHOOTING

Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit.

Actions to be taken for service, which depends on whether or not the inferior phenomenon is reoccurring at service, are sum-

marised in the table below. Check the contents below before investigating details.

Note : Refer to the manual of outdoor unit for malfunction-diagnosis method by remote controller.

10-1. TROUBLESHOOTING

Unit conditions at service

Error code

Actions to be taken for service (summary)

The inferior phenomenon is

reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action accord-

ing to 10-2.“Self-diagnosis action table”.

Conduct trouble shooting and ascertain the cause of the

inferior phenomenon according to 10-3.“Trouble shooting

by inferior phenomena”.

The inferior phenomenon is

not reoccurring.

Logged

Not logged

1Consider the temporary defects such as the work of

protection devices in the refrigerant circuit including

compressor, poor connection of wiring, noise and etc.

Re-check the symptom, and check the installation en-

vironment, refrigerant amount, weather when the infe-

rior phenomenon occurred, matters related to wiring

and etc.

2Reset error code logs and restart the unit after finishing

service.

3There is no abnormality concerning of parts such as

electrical component, controller board, remote controll-

er and etc.

1Recheck the abnormal symptom.

2Conduct trouble shooting and ascertain the cause of

the inferior phenomenon according to 10-3.“Trouble

shooting by inferior phenomena”.

3Continue to operate unit for the time being if the cause

is not ascertained.

4There is no abnormality concerning of parts such as el-

ectrical component, controller board, remote controller

and etc.

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Mitsubishi PLA-RP Service Manual Page 63

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