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Troubleshooting
SiBE12-933_A
202
Service Diagnosis
Troubleshooting
Check No.06
Refer to P.215
Check No.07
Refer to P.216
Check No.09
Refer to P.217
Note:
Refer to “Application of Silicon grease to a power transistor and a diode bridge” on P.264.
(R7147)
Caution
Be sure to turn off power switch before
connect or disconnect connector, or
parts damage may be occurred.
Turn off the power and turn it on
again to get the system started.
Error displayed again?
WARNING
To cool down the electricals, the
outdoor unit fan gets started when
the radiation fin temperature rises
above 75°C even when the air
conditioning is not operated and
stops itself when it drops below
70°C.
YES
(Precaution before turning on the power again)
Make sure the power has been off
for at least 30 seconds.
NO
YES
Has PCB been replaced?
YES
NO
YES
z
Fin thermistor
Thermistor as
specified in its
characteristic chart?
Check the radiation fin
temperature.
Check the outdoor unit fan
or related.
Check No. 06
Check the thermistor resistance
value.
Check No. 09
Radiation fin dirty?
Check No. 07
Check the installation condition.
NO
NO
Above 90°C?
Check if the silicon grease
applied properly on the
radiation fin. If not, apply it
(
∗
). (Note 1)
∗
Silicon grease
Part No.: 1172698
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.
Malfunctioning
Too dirty
Functioning
Slightly dirty