Troubleshooting for Outdoor Unit SiBE121021_C
354 Service Diagnosis
Troubleshooting
Check No.17
Refer to P.368
Check No.19
Refer to P.369
Note: Refer to “Application of silicon grease to a power transistor and a diode bridge” on page 462 for
detail.
(R14563)
Caution
NO
Slightly dirty
NG
Too dirty
OK
NO
YES
NO
YES
YES
Turn off the power and turn it on
again to start the system.
Check the radiation fin
temperature.
Above A ˚C?
Check No. 17
Check the installation condition.
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 fan motor.
Correct the connectors and
fan motor lead wire.
Replace the outdoor unit
PCB.
Clean up the radiation fin.
∗
Silicon grease
Part No.: 1
172698
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
(Precaution before turning on the power again)
Make sure the power has been off for at least 30 seconds.
Error displayed again? Has PCB been replaced?
Check No. 19
Check the outdoor unit fan
or related.
Radiation fin dirty?
A (°C)
50-75 class 103
80/90 class 105
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