Troubleshooting SiENBE04-507A
138 Service Diagnosis
Troubleshooting
Check No.6
Refer to P.146
Check No.7
Refer to P.147
Check No.9
Refer to P.148
Turn off the power and turn it on
again to get the system started.
Check No. 6
Check the thermistor resistance
value.
Replace the fin thermistor.
Check the power transistor
and fin for looseness. If
they are found to be fit
tightly, replace the PCB or
the power transistor.
Replace the fan motor.
Correct the connectors and
fan motor leads.
Replace the outdoor unit
PCB.
Clean up the radiation fin.
(R4280)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Error displayed again?
Check No. 9
Check the outdoor unit
fan or related.
Radiation fin dirty?
Thermistor as
specified in its characteristic
chart?
Above 90°C?
Check the radiation fin
temperature.
Check No. 7
Check the installation condition.
Fin thermistor
Malfunctioning
Functioning
Too dirty
Slightly dirty
NO
NO
YES
YES
NO
YES
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