Service manual

SiE18-201 Troubleshooting - Split Type Indoor Unit
Service Diagnosis 183
Troubleshooting
Check No.8
Refer to P.254
NO
NO
NO
Check No. 8
Indoor unit heat exchanger
thermistor check
Check the intake air filter.
Check the air passage.
YES
YES
(MF002)
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.