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Troubleshooting - Mitsubishi Electric Mr.Slim PUZ-HA42NKA Service Manual

Split-type, heat pump air conditioners r410a.
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10

TROUBLESHOOTING

10-1. 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.
10-2. CHECK POINT UNDER TEST RUN
(1) Before test run
"
OCH567
Check code
Actions to be taken for service (summary)
Judge what is wrong and take a corrective action according
Displayed
to "10-4. SELF-DIAGNOSIS ACTION TABLE".
Conduct troubleshooting and ascertain the cause of the
Not displayed
trouble according to "10-5. TROUBLESHOOTING BY IN-
FERIOR PHENOMENA".
1 Consider 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, when the trouble
occurred, matters related to wiring, etc.
Logged
2 Reset check code logs and restart the unit after finishing
service.
3 There is no abnormality concerning of parts such as
electrical component, controller board, remote controller,
etc.
1 Re-check the abnormal symptom.
2 Conduct troubleshooting and ascertain the cause of the
trouble according to "10-5. TROUBLESHOOTING BY
INFERIOR PHENOMENA".
3 Continue to operate unit for the time being if the cause
Not logged
is not ascertained.
4 There is no abnormality concerning of parts such as
electrical component, controller board, remote controller,
etc.
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