Check the voltage of the
connection wires on the indoor
terminal board between No. 1
and No. 3, and between No. 2
and No. 3.
Check No.11
Check the power supply
waveform.
YES
YES
Replace the indoor unit PCB.
Locate the cause of the
disturbance of the power
supply waveform, and correct
it.
NO
(R14714)
NO
YES
YES
NO
NO
Caution
Correct the indoor unit -
outdoor unit connection wires.
Diagnose the outdoor unit
PCB.
Replace the connection wires
between the indoor unit and
outdoor unit.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check the indoor unit - outdoor unit
connection wires.
Is there any wiring error?
Properly insulated?
Check the LED A on the outdoor
unit PCB.
Is LED A blinking?
Is there any disturbance?
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