Troubleshooting - Mitsubishi Electric Mr.SLIM PKA-A12GA Service Manual

10

TROUBLESHOOTING

10-1. TROUBLESHOOTING
<Error code display by self-diagnosis and actions to be taken for service (summary)>
Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit.
Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below. Check the contents
below before investigating details.
Unit conditions at service
The trouble is reoccurring.
The trouble is not reoccurring.
Error code
Judge what is wrong and take a corrective action
Displayed
according to "SELF-DIAGNOSIS ACTION TABLE" (10-3).
Identify the cause of the trouble and take a corrective
Not displayed action according to "TROUBLESHOOTING
BY INFERIOR PHENOMENA " (10-4).
Consider 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
environment, refrigerant amount, weather when the
trouble occurred, and wiring related.
Logged
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical components,
controller boards, and remote controller.
Recheck the abnormal symptom.
Identify the cause of the trouble and take a corrective
action according to "TROUBLESHOOTING
BY INFERIOR PHENOMENA " (10-4).
Not logged
Continue to operate unit for the time being if the cause
is not ascertained.
There is no abnormality in electrical components,
controller boards, remote controller etc.
20
Actions to be taken for service (summary)