Si12-411A Troubleshooting
Service Diagnosis 173
Troubleshooting
Check No.6
Refer to P.209
Note: If the outside temperature is below –10°C in the cooling mode, the system may get interrupted
with error A5 displayed. The system will be reset itself, but this stop will be put in the error history
memory.
NO
NO
NO
Check No. 6
Indoor unit heat exchanger
thermistor check
Check the intake air filter.
Check the air passage.
YES
YES
(R1401)
Check the dust accumulation on
the indoor unit heat exchanger.
YES
YES
Is there any
short-circuit?
Is it very dirty?
Is it very dirty?
Does it conform to
the thermistor characteristic
chart?
NO
Provide sufficient air passage.
Clean the air filter.
Clean the heat exchanger.
Replace the indoor unit PCB.
Replace the thermistor
(replace the indoor unit PCB).
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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