228
Outdoor fan motor error
[Defective fan motor,
defective outdoor PCB]
Compressor lock
[Defective compressor, defective
outdoor PCB]
NO
YES
¡ Check compressor wiring visually.
¡ Check insulation resistance. (1 MΩ or over)
¡ Check coil wire resistance. (Few Ω)
Is output voltage applied to all 3
phases of power transistor?
Inspect compressor.
Defective inverter
If check results are normal,
compressor is locked.
Serial signal transmission abnormality
YES
YES
NO
NO
Is connector connection good?
Is voltage applied to fan motor?
(DC)
Defective fan motor
Correct connector
connection.
Defective outdoor unit
PCB
Is this a recurring error when reset-
ting power supply?
Is the wiring connection between the
indoor and outdoor unit improperly wired?
Is AC 220/240 V measured between ter-
minals 1 and 2 on the outdoor unit?
Is the electrical system operating
properly (fuse, reactor, etc.)?
Does the voltage between terminals 2
and 3 on the outdoor unit oscillate bet-
ween approximately DC 0 and 12 volts?
Does the voltage between terminals 2
and 3 on the indoor unit oscillate bet-
ween approximately DC 0 and 12 volts?
Correct indoor and out-
door unit connections.
Defective indoor unit
circuit board.
Defective outdoor cir-
cuit board
This is due to a tempo-
rary cause (interfer-
ence, etc.) and is not
a failure of the unit.
Defective indoor unit
circuit board. Inspect
interconnection wire.
Inspect interconnec-
tion wire.
Replace fuse and reac-
tor.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
(1)
Possible causes include interference
from the lighting, spontaneous load inter-
ference, power supply interference and
radial interference.
[Indoor/outdoor printed circuit board defect
Outdoor power source abnormality]
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