SiUS04-924 Troubleshooting
Service Diagnosis 99
Troubleshooting
Check No.07
Refer to P.109
Check No.09
Refer to P.110
Note: Refer to “1.3 Application of Silicon grease to a power transistor and a diode bridge” on P 185.
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts damage may occur.
(R9399)
NO
Slightly dirty
Malfunctioning
Too dirty
Functioning
NO
YES
Turn off the power and turn it on
again to get the system started.
Check the radiation fin
temperature.
Check No. 07
Check the installation condition.
NO
YES
YES
Radiation fin
dirty?
Above its stop
level?
Check No. 09
Check the outdoor unit fan or
related.
Error displayed
again?
Has PCB been
replaced?
Check if the silicon grease
applied properly on the
radiation fin. If not, apply it
(
*
). (Note 1)
Check the power transistor
and fin for looseness. If they
are found to fit tight, replace
the PCB or the power
transistor.
Replace the outdoor unit
PCB.
Replace the fan motor.
Correct the connectors and
fan motor leads.
Clean up the radiation fin.
*
Silicon grease
Part No.: 1
172698
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