Daikin SUPER MULTI NX G Series, Service Manual

Page: 149 / 244

SiUS12-928_A Troubleshooting
Service Diagnosis 140
Troubleshooting 24/32 class
Check No.07
Refer to P.153
Check No.09
Refer to P.154
Note: Refer to “Application of silicon grease to a power transistor and a diode bridge” on page 224 for
detail.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
(R11714)
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. 07
Check the installation condition.
NO
YES
YES
Radiation fin dirty?
Above ?
Check No. 09
Check the outdoor 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
(
∗
). (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 outdoor unit
PCB.
Replace the fan motor.
Correct the connectors and
fan motor lead wire.
Clean up the radiation fin.
∗
Silicon grease
Part No.: 1 172698
24/32 class 105°C (221°F)