Troubleshooting - Mitsubishi Electric PUHZ-SHW80YAA Service Manual

9

TROUBLESHOOTING

9-1. TROUBLESHOOTING
<Check code displayed by self-diagnosis and actions to be taken for service (summary)>
Unit conditions at service
The trouble is reoccurring.
The trouble is not reoccurring.
OCH651
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Check code
Judge what is wrong and take a corrective action according
Displayed
to "9-2. SELF-DIAGNOSIS ACTION TABLE".
Conduct troubleshooting and ascertain the cause of the
Not displayed
trouble according to "9-3. TROUBLESHOOTING OF
PROBLEMS".
1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise, etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring, etc.
Logged
2Reset check code logs and restart the unit after finishing
service.
3There is no abnormality in electrical component,
controller board, remote controller, etc.
1Re-check the abnormal symptom.
2Conduct troubleshooting and ascertain the cause of the
trouble according to "9-3. TROUBLESHOOTING OF
PROBLEMS".
Not logged 3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality concerning of parts such as
electrical component, controller board, remote controller,
etc.
Actions to be taken for service (summary)