•When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate.
•When OPERATION INDICATOR lamp flashes ON and OFF in every
DHow to check mis-wiring and serial signal error
Turn OFF the power supply.
Is there rated voltage AC | No |
in the power supply? |
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Yes |
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Turn ON the power supply.
Check the power supply.
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| Is there rated voltage between | No |
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| Check the wiring. |
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| outdoor terminal block S1 and |
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| S2? |
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| Yes |
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| Press EMERGENCY OPERATION switch once. |
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| Does the left lamp of OPERATION INDICATOR |
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| lamp light up? |
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| No |
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| <Confirmation of the power to the indoor unit> |
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| Yes |
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| Is there any |
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| Is serial signal error indicated 6 minutes later? |
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| No | poor contact, or wire | Yes |
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| disconnection of the |
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| Correct them. |
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| connecting wire? |
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| Turn OFF the power supply. |
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| Check once more if the indoor/outdoor |
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| B | connecting wire is not |
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| W1. | ||||||||||||||||||
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| S3. |
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| P.C. board during the operation. |
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| W1 |
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| Be sure to confirm the wiring is correct before the | ||||||||||||||
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| operation starts. |
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| W3.Be sure to check this within 3 minutes after turning | |||||||||||||
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| ON. After 3 minutes, LED blinks 6 times. Even when | ||||||||||||
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| Turn ON the power supply. |
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| the inverter P.C.board or the outdoor electronic control | ||||||||||||||
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| P.C.board is normal, LED blinks 6 times after | ||||||||||||
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| 3 minutes. |
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| (Except for outdoor unit of multi system type) | ||||||||||||
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| Does the LED on the inverter P.C. board |
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| No | Replace the inverter P.C. board or |
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| or the outdoor electronic control P.C.board |
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| the outdoor electronic control P.C.board. |
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| repeat |
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| W2 |
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| quick blinking"? W3 |
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| not lighted) |
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| W2 Be careful to the residual | |||||||||||||||||||
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| Yes |
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| voltage of smoothing capacitor. |
A
·Turn OFF
·Turn OFF the power supply and then turn ON again.
·Press EMERGENCY OPERATION switch.
Turn OFF the power supply. |
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Remove the |
| Is there any error of the | ||||
outdoor terminal block S2 and S3. |
| indoor/outdoor connecting wire, | ||||
Turn ON the power supply. |
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| such as the damage of the wire, | |||||
Is there amplitude of 10 to 20V DC |
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No intermediate connection, poor | ||||||
between outdoor terminal block S2 | ||||||
and S3? <Confirmation of serial |
| contact to the terminal block? | ||||
signal> |
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Yes |
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Is there rated voltage between | ||||||
| indoor/outdoor connecting wire, | |||||
indoor terminal block S1 and S2? |
| such as the damage of the wire, |
Yes
Yes
Replace the indoor/outdoor connecting wire.
Replace the
Is serial signal | No | |
error indicated | ||
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6 minutes later? |
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·Reinstall either the unit or the light each other away.
·Attach a filter on remote control
<Confirmation of power voltage> | intermediate connection, poor |
| contact to the terminal block? |
| No |
Yes | No |
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indoor/outdoor connecting wire.
Yes |
B |
receiving section of the indoor unit.
Replace the indoor electronic control P.C. board.
Be sure to release the
Refer to outdoor unit service manual.
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