Daikin 2MKS40G2V1B Service Manual page 262

Troubleshooting for Outdoor Unit
Troubleshooting
Check No.17
Refer to P.269
Check No.19
Refer to P.270
Note: Refer to "Application of silicon grease to a power transistor and a diode bridge" on page 315 for
detail.
251
Be sure to turn off the power switch before connecting or disconnecting
Caution 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.
Turn off the power and turn it on
again to start the system.
Error displayed again?
NO
Check No. 19
Check the outdoor unit fan
or related.
OK
Radiation fin dirty?
Slightly dirty
Check No. 17
Check the installation condition.
A
(°C)
40 class 95
50 class 92.5
YES
Has PCB been replaced?
NO
Check the radiation fin
temperature.
A
Above ˚C?
YES
NG
Too dirty
SiBE12-816_D
YES
Check if the silicon grease
applied properly on the
radiation fin. If not, apply it
(∗). (See Note.)
∗
Silicon grease
Part No.: 1172698
NO
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 leads.
Replace the outdoor unit
PCB.
Clean up the radiation fin.
(R14417)
Service Diagnosis