•Unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate.
•POWER lamp flashes ON and OFF in every 0.5 seconds. Outdoor unit doesn’t operate.
M How to check miswiring and serial signal error (outdoor unit does not work)
Turn OFF the power supply. |
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Is there rated voltage in the |
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power supply? | No |
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Yes
Turn ON the power supply.
Is there rated voltage between outdoor terminal block S1 and
S2?No
Yes
Press EMERGENCY OPERATION switch once.
Does
Yes
Is serial signal error indicated 6 minutes later?
Yes
Check the wiring.
No
Is there any miswiring, poor contact, or wire
No
disconnection of the Yes
Correct them. indoor/outdoor connect-
ing wire?
No
A
Turn OFF the power supply.
Check once more if the indoor/outdoor B connecting wire is not miswiring.
1
Turn ON the power supply.
1. Miswiring may damage indoor electronic control P.C. board during the operation.
Be sure to confirm the wiring is correct before the opera- tion starts.
3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C. board or the outdoor electronic control P.C. board is normal, LED blinks 6 times after 3 minutes.
A
•Turn OFF
•Turn OFF the power supply and then turn ON again.
•Press EMERGENCY OPERATION switch.
Does the LED on the inverter P.C. board or |
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| Replace the inverter P.C. board or the out- | ||
the outdoor electronic control P.C. board |
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repeat | No |
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ON quick blinking"? 3 | (Lighted |
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| 2. Be careful to the residual |
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| voltage of smoothing capacitor. |
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Turn OFF the power supply. |
| Is there any error of the in- |
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Remove the |
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outdoor terminal block S2 and S3. |
| door/outdoor connecting wire, |
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| Replace the indoor/ | |||
Turn ON the power supply. |
| such as the damage of the wire, |
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| outdoor connecting | |||
No | Yes | ||||||||
Is there amplitude of 10 to 20 VDC |
| intermediate connection, poor |
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between outdoor terminal block S2 and |
| contact to the terminal block? |
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S3? <Confirmation of serial signal> |
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| Yes |
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Is there rated voltage between |
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| door/outdoor connecting wire, |
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| Replace the indoor/ | ||||
Is serial signal error indicated 6 minutes later?
Yes
B
No
•Reinstall either the unit or the light each other away.
•Attach a filter on remote control receiv- ing section of the indoor unit.
indoor terminal block S1 and S2? | No | such as the damage of the wire, |
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Yes | ||||||||
<Confirmation of power voltage> |
| intermediate connection, poor |
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| Yes |
| contact to the terminal block? |
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| No |
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Replace the indoor electronic control P.C. board.
Be sure to release the
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