FILE NO.
1.Is it possible to detect the power supply voltage
2.Does the indoor fan motor operate in cooling operation?
(In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned on, to prevent a cold air from blowing in.)
Turn off power supply once, and turn it on again.
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| YES | Is it possible to detect |
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Does fan motor |
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DC 1V or more between |
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continue to operate? |
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| 5 + and 3 – of |
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| NO |
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| motor connector (CN31). |
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| YES |
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Does check | NO | Does check connecting |
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| Reconnecting the |
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operation LED flash? |
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| cable or power supply |
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| in terconnection cable |
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| cord complely? |
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| and terminal block |
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| YES |
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| YES |
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| NO |
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| Does check |
| Does check 5V | ||||||||||||||||
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| 5V at display unit? |
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| at main P.C board? |
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| YES |
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| YES |
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Start to operate |
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| Replace |
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indoor unit in cooling |
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| display unit |
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operation at airflow |
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level “LOW”. |
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Peplace indoor fan motor.
Does indoor fan operate?
YES
NO |
| Is it possible to detect | NO |
DC | |||
| 1 | + and 3 – of motor |
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| connector (CN31). |
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Change airflow level to “HIGH”.
YES
(Motor connection condition) | NO |
Is it possible to detect DC 15V | |
between 4 + and 3 – of |
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motor connector (CN31).
YES
Start to operate the indoor unit in except
heating operation. NO At this time, is it possible to
detect DC 1V or more between 5 + and 3 – of motor connector (CN31)?
YES
Turn off indoor unit and remove connector from motor. Then push [ ] button
on remote controller to stop flashing lamp on indoor unit.
Is it possible to detect | NO | |
DC 15V between 4 | + | |
and 3 – of motor |
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connector (CN31). |
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YES
Turn off indoor unit and remove connector from motor. Then start to operate indoor unit with remote controller.
Start to operate the |
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indoor unit in except |
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heating operation. |
| NO |
At this time, is it possible | ||
to detect DC 1V or more |
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between 5 + and 3 | – |
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of motor connector (CN31)? (Check this condition within 15 seconds after starting unit.)
Peplace main P.C. board.
YES
AB
– 77 –