When OPERATION INDICATOR lamp flashes
Indoor fan motor doesn’t operate.
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A Check of indoor fan motor | Turn OFF the power supply. |
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| Check connector CN211 visually. |
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No |
| Yes | Is soldered point of the connector | No | ||||||||
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| Are lead wires connected? |
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| correctly soldered? |
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| Yes |
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Reconnect the lead wires. |
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Resolder it.
Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board. Measure resistance between lead wires No.3 and No.4 and then No.1 and No.4.
Is resistance 0 (short circuit) or ∞ (open circuit)?
Yes ( 0 or ∞ )
Repair or replace the indoor fan motor.
No
(others)
Turn ON the power supply. Stop it if the unit operate. Insert screwdriver into air outlet to rotate indoor fan motor slowly for 1 revolution or over, and measure voltage between No.2(+) and
No
Does voltage repeat 0V DC and 5V DC?
Yes
Replace the indoor electronic control P.C. board.
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but doesn’t operate with the remote controller.
B Check of remote controller and receiver P.C. board
wCheck if the remote controller is exclusive for this air conditioner.
Press OPERATE/STOP(ON/OFF) button on the remote controller.
Is LCD display on the the remote controller visible?
Yes
Remove the batteries, then set them back and press the RESET button. Check if the unit operates with the remote controller.
Does the unit operate with the remote controller?
Yes
OK
No
Replace the batteries.(Refer to
(not clear)
No | Turn on a radio to AM and press |
OPERATE/STOP(ON/OFF) button on the | |
| remote controller. |
Is noise heard from radio? |
| No | ||
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| Yes |
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Are there any fluorescent lights of | Yes | |||
inverter or |
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the range of 1m? |
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| No |
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Replace the remote controller.
●Reinstall the unit away from lights.
●Attach a filter on receiving part.
Measure the voltage between receiver P.C. board connector CN301 No.1(+) and
Yes
Is the voltage approx. 4V DC?
No(5V or 0V DC)
Replace the indoor electronic control P.C. board.
Replace the receiver P.C. board.
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