Troubleshooting SiBE06-708_A
117 Service Diagnosis
Troubleshooting RK(X)S25/35F2V1B models
Check No.06
Refer to P.129
Check No.07
Refer to P.130
Check No.09
Refer to P.131
Note: Refer to “Application of silicon grease to a power transistor and a diode bridge” on page 262 for
detail.
(R10728)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
Slightly dirty
Malfunctioning
Too dirty
Functioning
NO
YES
NO
YES
∗ Fin thermistor
Turn off the power and turn it on
again to start the system.
Check the radiation fin
temperature.
Check No. 07
Check the installation condition.
NO
YES
YES
Radiation fin dirty?
Above ˚C?
Thermistor as
specified in its characteristic
chart?
Check No. 06
Check the thermistor resistance
value.
Check No. 09
Check the outdoor fan or
related.
Error displayed again?
Has PCB been replaced?
Replace the fin thermistor.
Check if the silicon grease
applied properly on the
radiation fin. If not, apply it
(
∗
). (See Note.)
Check the power transistor
and the radiation fin for
looseness. If they are found
to be fit tightly, replace the
outdoor unit PCB or the
power transistor.
Replace the outdoor unit
PCB.
Replace the fan motor.
Correct the connectors and
fan motor lead wire.
Clean up the radiation fin.
∗
Silicon grease
Part No.: 1
172698
(°C)
RK(X)S25/35F2V1B 90
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