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SiUS121827E Troubleshooting for SA Indoor Unit
Part 6 Service Diagnosis 191
Reference
Troubleshooting
Check No.11 Refer to P.235
Check No.11
Check the power supply
waveform.
Check the voltage of the
connection wires on the indoor
terminal block between No. 1
and No. 3, and between No. 2
and No. 3.
YES
Blink
Replace the indoor unit PCB
(control PCB).
Locate and eliminate the
cause of the disturbance of
the power supply waveform.
NO
(R24622)
Continuously ON or OFF
NO
YES
YES
NO
Caution
Correct the connection wires
between the indoor unit and
the outdoor unit.
Replace the outdoor unit PCB
(main PCB).
Replace the connection wires
between the indoor unit and
outdoor unit.
Is LED A
blinking?
Properly
insulated?
Is there any
disturbance?
Is there any wiring
error?
Check the connection wires
between the indoor unit and the
outdoor unit.
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.
NO
YES
Check the power supply voltage.
Correct the power supply.
YES
NO
Replace the outdoor fan motor
and the outdoor unit PCB
(main PCB).
Rotate the
outdoor fan manually.
Does the outdoor fan rotate
smoothly?
Is the
voltage fluctuation
within ±10% from the rated
value?
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