Daikin SiBE04-624_B_FTXR-E Service Manual page 137

SiBE04-624_B
Troubleshooting
Check No.01
Refer to P.134
Check No.17
Refer to P.141
Check No.19
Refer to P.142
Note: Refer to "Silicon Grease on Power Transistor / Diode Bridge" on P.151.
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn off the power and turn it on
again to start the system.
Error displayed again?
NO
Check No. 19
Check the outdoor fan or
related.
OK
Radiation fin dirty?
Slightly dirty
Check No. 17
Check the installation condition.
A (°C)
86
YES
Has the PCB been
replaced?
NO
Check the radiation fin
temperature.
Above A˚C?
YES
Check No. 01
Check the thermistor resistance
value.
∗ Radiation
thermistor
Thermistor as
specified in its characteristic
chart?
YES
NG
Too dirty
Troubleshooting
YES
Check if the silicon grease
is applied properly on the
radiation fin. If not, apply the
silicon grease.
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.
fin
NO
Replace the radiation
thermistor.
Replace the fan motor.
Correct the connectors and
fan motor lead wire.
Replace the outdoor unit
PCB.
Clean up the radiation fin.
(R18323)
fin
127