12-3-5. Indoor Fan is Defective
➀Check if the indoor fan is locked up. Turn fan gently by hand.
When fan does not turn easily ➞ Replace fan motor
No abnormalities, proceed to check ➁.
➁Check if motor circuit is defective.
Set temperature by remote controller so that air conditioner operates under Thermo. OFF in either cooling or heating operation, then start operation.
Check if it operates without the operation lamp blinking for more than 3 minutes.
In case of abnormality (operation lump starts blinking after about 1 minute) ➞ Proceed to check ➂.
No abnormalities, proceed to check ➂.
➂Check indoor unit PCB.
Measure voltage between 1 – 2 of 3P connector (Hole IC) on indoor unit PCB.
Caution: Care should be taken that the tips of the tester rods do not touch each other since the circuit is electrically charged.
Normal
Connector No. | Voltage |
|
|
Between 1 – 2 | DC 3 – 7 V |
|
|
*Use a circuit tester (set to DC range).
In case of abnormality ➞ Replace indoor unit PCB.
No abnormalities, proceed to check ➃.
➃Disconnect FAN 5P connector on indoor unit PCB and measure resistance between cables.
Normal
Color | Resistance |
BLU – BRN | 94 – 116 Ω |
|
|
BLU – PNK | 115 – 141 Ω |
|
|
In case of abnormality ➞ Replace the indoor fan motor.
No abnormalities, replace indoor unit PCB.
12-3-6. Power Circuit Wiring Error
Check wiring of power circuit.
Set temperature by remote controller so air conditioner operates under Thermo. ON in cooling operation, then start operation.
Check if compressor motor operates for more than 10 seconds.
It does not operate at all ➞ Proceed to check
Stops operation in about 3 seconds ➞ Proceed to check
No abnormalities, proceed to check
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