Daikin FTKS20CVMB Service Manual page 137

Troubleshooting
Troubleshooting
Check No.6
Refer to P.140
P4 : Radiation fin thermistor
J3 : Discharge pipe thermistor
J6 : Outdoor heat exchanger thermistor
H9 : Outdoor air temperature thermistor
128
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Turn on the power again.
Error displayed again
on remote controller?
YES
Connector or thermistor
disconnected?
NO
Check No. 6
Check the thermistor resistance
value.
Normal?
YES
Check No. 6
Check the indoor heat exchanger
thermistor resistance value in the
heating mode.
Indoor
heat exchanger thermistor
functioning?
YES
NO
YES
NO
NO
SiENBE04-401A
Reconnect.
Reconnect.
Replace defective one(s) of
the following thermistors.
Radiation fin thermistor
Discharge pipe thermistor
Outdoor heat exchanger
thermistor
Outdoor air thermistor
Replace the following
thermistor.
Indoor heat exchanger
thermistor
Replace the outdoor unit
PCB. (Replace the indoor
unit PCB.)
(R4097)
Service Diagnosis