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SiUS091133 Troubleshooting
Service Diagnosis 110
Troubleshooting
Check No.11
Refer to P.144
Check No.11
Check the power supply
waveform.
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.
YES
YES
Replace the indoor unit PCB.
Locate the cause of the
disturbance of the power supply
waveform, and correct it.
NO
(R16914)
NO
YES
YES
NO
NO
Caution
Correct the indoor unit - outdoor
unit connection wires.
Diagnose the outdoor unit
PCB.
∗ Before you check the LED A,
cancel the standby electricity
saving function by starting fan
operation with the remote
controller.
∗ Wait at least for 7 sec. after
turning on the power.
Replace the connection wires
between the indoor unit and
the outdoor unit.
Is LED A blinking?
Properly insulated?
Is there any disturbance?
Is there any wiring error?
Check the indoor unit - outdoor
unit connection wires.
Check the LED A on the outdoor
unit PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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