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Troubleshooting
SiBE05-722ED
73
Service Diagnosis
Troubleshooting
Check No.11
Refer to P.100
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check the power supply voltage.
NO
YES
Correct the power supply.
Check the indoor unit - outdoor
unit connection wires.
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
NO
YES
NO
Correct the indoor unit -
outdoor unit connection wires.
Replace the connection wires
between the indoor unit and
outdoor unit.
Properly insulated?
Is there any wiring error?
Check No.11
Check the power supply
waveform.
YES
Replace the indoor unit PCB.
Locate the cause of the
disturbance of the power
supply waveform, and correct
it.
(R19525)
NO
YES
NO
Diagnose the outdoor unit
PCB.
Is LED A blinking?
Is there any disturbance?
Check the LED A on the outdoor
unit PCB.
YES
NO
Replace the outdoor fan
motor and the outdoor unit
PCB.
Rotate the
outdoor fan by hand.
Does the outdoor fan rotate
smoothly?
Is the
voltage fluctuation
within ±10% from the
rated value?
Is the
voltage fluctuation
within ±10% from the
rated value?