Daikin FTXS20K2V1B Service Manual page 108

Troubleshooting
Troubleshooting
Check No.17
Refer to P.107
Check No.19
Refer to P.108
Note: Refer to "Application of silicon grease to a power transistor and a diode bridge" on page 170 for
detail.
98
Be sure to turn off the power switch before connecting or disconnecting Be sure to turn off the power switch before connecting or disconnecting
Caution Caution connectors, or parts may be damaged. connectors, or parts may be damaged.
Turn off the power and turn it on Turn off the power and turn it on
again again to start the system. to start the system.
Error displayed again? Error displayed again?
NO NO
Check No. 09 Check No. 19
Check the outdoor fan or Check the outdoor fan or
related. related.
OK OK
Radiation fin dirty? Radiation fin dirty?
Slightly dirty Slightly dirty
Check No. 17 Check No. 07
Check the installation condition. Check the installation condition.
A (°C)
98
YES YES
Has the PCB been
Has PCB been replaced?
replaced?
NO NO
Check the radiation fin Check the radiation fin
temperature. temperature.
Above A ˚C? Above A ˚C?
YES YES
NG NG
Too dirty Too dirty
SiBE041134
YES YES
Check if applied properly on Check if the silicon grease
applied properly on the the radiation fin. If not,
radiation fin. If not, apply it apply the silicon grease (∗).
(See Note.) (∗). (See Note.)
∗ ∗
Silicon grease Silicon grease
Part No.: 1172698
Part No.: 1172698
NO NO
Replace the outdoor unit Check the power transistor
PCB. 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 fan Replace the fan motor.
motor.
Correct the connectors and
fan motor leads.
Correct the connectors and
fan motor leads.
Replace the outdoor unit
Replace the outdoor unit PCB.
PCB.
Clean up the radiation fin. Clean up the radiation fin.
(R16053) (R13537)
Service Diagnosis