Mitsubishi Electronics PLA-A12BA PLA-A12BA1 PLA-A18BA PLA-A18BA1 PLA-A24BA PLA-A24BA1 PLA-A30BA PLA-A30BA1 User Manual

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10
TROUBLESHOOTING
Unit conditions at service
Error code
Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action 
according to “SELF-DIAGNOSIS ACTION TABLE” (10-3).
Identify the cause of the trouble and take a corrective
action according to “TROUBLESHOOTING 
BY INFERIOR PHENOMENA” (10-4).
The trouble is not reoccurring.
Logged
Not logged
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. 
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).
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.
<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.
10-1. TROUBLESHOOTING