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(1) Power is not turned on (Does not operate entirely) |
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| Check Item |
| Turn off the power supply |
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| Considerable main cause |
| once, and turn on it again |
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| after 5 seconds passed. |
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| Measures |
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NO | Does the operation |
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| lamp flash? |
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| YES |
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| Is the power supply | NO | Does send display | NO |
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| turned on by pressing | of remote controller flash | Remote controller | ||
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| [START/STOP] button |
| normally, and is the signal |
| error |
| on remote controller? |
| sent securely? |
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| YES | |||
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| (No trouble) |
| Is fuse of indoor control | YES | Parts (R21, R109, SG01, | |||||||
| board blown? (F01) |
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| C15, C01, DB01, C02, | ||||
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| IC01, T01) are defective. | ||||||
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| NO |
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| Is temp. fuse blown? | YES | Connection of connecting | |||||||
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| wire is defective. | ||||
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| NO |
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| Is voltage indicated |
| YES |
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NO on rear of indoor control |
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| board (DC12V or 5V) |
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| normal? |
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Is DC310 to 340V | NO |
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applied to primary |
| To item of | ||||||||
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side of SW trans. |
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| trouble before power board | |||||||
(T01) applied? |
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Is DC35V, |
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| Is DC35V, | |
NO |
| Turn “OFF” breaker |
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DC12V, DC7V |
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| DC12V, DC7V | ||||||
applied to secondary |
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| once, and “ON” |
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| applied to secondary | ||||
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| again after removing |
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side of SW trans. |
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| side of SW trans. | |||||
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| motor. |
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(T01) applied? |
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| (T01) applied? | ||
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| YES |
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| YES |
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YES
Microcomputer is defective.
SW trans.,
IC (IC01) for power supply, ] or fan motor
Refer to the item of Remote controller check. (p.49)
Replace temp. fuse set.
Check connecting wire.
Replace main board.
Motor is defective.
•Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of damage of the motor.
(2) Power is not turned on though Indoor P.C. board is replaced
<Confirmation procedure>
Turn on power supply.
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| NO | Is wired correctly to white and black | NO | ||
Does operation lamp flash? | ||||||
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| lead wires of terminal block? |
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| YES |
| YES |
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Correct wiring.
To item of “Power supply is not turned on”.
– 46 –