Service Manual

Troubleshooting SiUS091133
139 Service Diagnosis
Troubleshooting
Check No.17
Refer to P.149
Check No.19
Refer to P.150
Note: Refer to “Application of silicon grease to a power transistor and a diode bridge” on page 391 for
detail.
(R16696)
Caution
NO
Slightly dirty
NG
Too dirty
OK
NO
YES
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
Above A?
Radiation fin dirty?
Check No. 19
Check the outdoor fan or
related.
Error displayed again?
Has the PCB been
replaced?
Check if applied properly on
the radiation fin. If not,
apply the silicon grease (
∗ ).
(See Note.)
∗
Silicon grease
Part No.: 1 172698
Replace the outdoor unit
PCB.
Clean up the radiation fin.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Replace the outdoor fan
motor.
Correct the connectors and
fan motor leads.
Replace the outdoor unit
PCB.
A
09/12 class 98°C (208.4°F)
15/18 class 85°C (185°F)
24/30/36 class 105°C (221°F)