Troubleshooting SiUS041829E
108 Part 6 Service Diagnosis
Troubleshooting
Check No.17 Refer to P.118
Check No.19 Refer to P.119
Refer to Silicone Grease on Power Transistor/Diode Bridge on page 132 for details.
Caution
Turn off the power. Then, turn on
the power to restart the system.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
(R23953)
NO
NG
OK
NO
YES
Check the radiation fin
temperature.
NO
YES
YES
Above A?
Check No. 19
Check the outdoor fan.
Error displayed
again?
Has the PCB
been replaced?
Check if silicone grease is
applied properly on the
radiation fin. If not, apply
the silicone grease.
Replace the outdoor unit
PCB (main PCB).
Replace the outdoor fan
motor.
Correct the connectors and
fan motor leads.
Replace the outdoor unit
PCB (main PCB).
YES
NO
Radiation fin
dirty?
Clean up the radiation fin.
Check the installation
condition.
Go to Check No. 17.
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