Troubleshooting for RA Indoor Unit SiEN18-622
324 Troubleshooting
Troubleshooting
Check No.06
Refer to P.331
NO
NO
NO
NO
Check No. 06
Indoor unit heat exchanger
thermistor check
Clean the air filter.
(R4695)
Caution
Check the air passage.
YES
YES
YES
YES
Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.
Is there any
short-circuit?
Check the intake air filter.
Is it very dirty?
Check the dust accumulation on
the indoor unit heat exchanger.
Is it very dirty?
Does it conform to the
thermistor characteristic
chart?
Provide sufficient air passage.
Clean the heat exchanger.
Replace the indoor unit PCB.
Replace the thermistor
(replace the indoor unit PCB).
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