Troubleshooting - Mitsubishi Electric MXZ-8A140VA Technical & Service Manual

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 and control board of outdoor unit.
Actions to be taken for service, which depends on whether or not the trouble is reoccurring at service, are summarized in the
table below. Check the contents below before investigating details.
Unit conditions at service
The trouble has recurred.
The trouble is not reoccurring.
Error code
Judge what is wrong and take a corrective action according
Displayed
to "9-3. SELF-DIAGNOSIS ACTION TABLE".
Conduct trouble shooting and ascertain the cause of the
Not displayed
trouble according to "9-4. 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 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
2Reset error code logs and restart the unit after finishing
service.
3There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.
1Re-check the abnormal symptom.
2Conduct trouble shooting and ascertain the cause of the
trouble according to "9-4. TROUBLESHOOTING
BY INFERIOR PHENOMENA".
3Continue to operate unit for the time being if the cause
Not logged
is not ascertained.
4There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.
40
Actions to be taken for service (summary)