Troubleshooting - Mitsubishi Electric PUHZ-HRP200YKA Service Manual

8

TROUBLESHOOTING

8-1. 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 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 is reoccurring.
The trouble is not reoccurring.
Error code
Judge what is wrong and take a corrective action according to
Displayed
"8-3. Self-diagnosis action table".
Conduct troubleshooting and ascertain the cause of the
Not displayed
trouble.
1 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,
Logged
matters related to wiring and etc.
2 Reset error code logs and restart the unit after fi nishing
service.
3 There is no abnormality in electrical component, controller
board, and etc.
1 Re-check the abnormal symptom.
2 Conduct troubleshooting and ascertain the cause of the
trouble.
Not logged 3 Continue to operate unit for the time being if the cause is
not ascertained.
4 There is no abnormality concerning of parts such as
electrical component, controller board, and etc.
14
Actions to be taken for service (summary)