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9
TROUBLESHOOTING
9-1. TROUBLESHOOTING
<Check code displayed by self-diagnosis and actions to be taken for service (summary)>
Present and past check codes are logged, and they displayed on the wired remote controller or controller board of outdoor
unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized 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.
Unit conditions at service
The trouble is reoccurring.
The trouble is not reoccurring.
OCH492A
Check code
Actions to be taken for service (summary)
Judge what is wrong and take a corrective action
Displayed
according to "9-2.SELF-DIAGNOSIS ACTION TABLE".
Conduct troubleshooting and ascertain the cause of the
Not displayed
trouble according to "9-3. TROUBLESHOOTING
BY INFERIOR PHENOMENA ".
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, and wiring related.
Logged
2Reset check code logs and restart the unit after finishing
service.
3There is no abnormality in electrical components,
controller boards, and remote controller.
1Recheck the abnormal symptom.
2Identify the cause of the trouble and take a corrective
action according to "9-3. TROUBLESHOOTING BY
INFERIOR PHENOMENA ".
Not logged
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality in electrical components,
controller boards, remote controller, etc.
16
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