Service manual

Troubleshooting SiBE05-722_C
92 Service Diagnosis
Troubleshooting RK(X)S25/35E2V1B
Check No.01
Refer to P.96
Check No.17
Refer to P.103
Check No.19
Refer to P.104
Note: Refer to “Silicon Grease on Power Transistor / Diode Bridge” on page 116 for detail.
(R18359)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
Slightly dirty
NG
Too dirty
OK
NO
YES
NO
YES
∗ Radiation fin thermistor
Turn off the power and turn it on
again to start the system.
Check the radiation fin
temperature.
Check No. 17
Check the installation condition.
NO
YES
YES
Radiation fin dirty?
Above A˚C?
Thermistor as
specified in its characteristic
chart?
Check No. 01
Check the thermistor resistance
value.
Check No. 19
Check the outdoor fan or
related.
Error displayed again?
Has the PCB been
replaced?
Replace the radiation fin
thermistor.
Check if the silicon grease
applied properly on the
radiation fin. If not, apply the
silicon grease.
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 fan motor.
Correct the connectors and
fan motor lead wire.
Replace the outdoor unit
PCB.
Clean up the radiation fin.
A (°C)
RK(X)S25/35E2V1B 90