Mitsubishi Electric Mr.SLIM PCA Series Service Manual page 14

9 TROUBLESHOOTING
9-1. 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.
OCH501
Error code Actions to be taken for service (summary)
Judge what is wrong and take a corrective action
Displayed
according to "9-3. Self-diagnosis action table".
Conduct troubleshooting and ascertain the cause of the
Not displayed
trouble according to "9-4. Troubleshooting of problems".
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, matters related to wiring and etc.
Logged
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical component,
controller board,remote controller and etc.
Re-check the abnormal symptom.
Conduct trouble shooting and ascertain the cause of the
trouble according to "9-4. Troubleshooting of problems".
Continue to operate unit for the time being if the cause
Not logged
is not ascertained.
There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.
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