Daikin B-Series Service Manual page 101

Troubleshooting
Troubleshooting
Check No.6
Refer to P.107
P4 :
J3 :
J6 :
H9 :
92
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 unit heat
exchanger thermistor resistance
value in the heating mode.
Indoor unit
heat exchanger thermistor
functioning?
YES
Radiation fin thermistor
Discharge pipe thermistor
Outdoor heat exchanger thermistor
Outdoor air thermistor
NO
YES
NO
NO
Si06-313
Reconnect.
Reconnect.
Replace defective one(s) of
the following thermistors.
l
Radiation fin thermistor
l
Discharge pipe
temperature thermistor
l
Outdoor unit heat
exchanger temperature
thermistor
l
Outdoor air thermistor
Replace the following
thermistor.
l
Indoor unit heat
exchanger thermistor
Replace the outdoor unit
PCB. (Replace the indoor
unit PCB.)
(R2849)
Service Diagnosis