Daikin B-Series Service Manual page 216

Si12-714
Troubleshooting
Check No.06
Refer to P.219
J3 error if discharge pipe
thermistor temperature is
smaller than condenser
thermistor temperature
P4 :
J3 :
J6 :
J8 :
J9 :
H9 :
Service Diagnosis
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. 06
Check the thermistor resistance
value.
Normal?
YES
Cooling: Outdoor unit heat
exchanger thermistor
Heating: Indoor unit heat
exchanger thermistor
Check No. 06
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
Liquid pipe thermistor
Gas pipe thermistor
Outdoor temperature thermistor
NO
YES
NO
NO
Troubleshooting
Reconnect.
Reconnect.
Replace defective one(s) of
the following thermistors.
Radiation fin thermistor
Discharge pipe
thermistor
Outdoor unit heat
exchanger thermistor
Liquid pipe thermistor
Gas pipe thermistor
Outdoor temperature
thermistor
Replace the following
thermistor.
Indoor unit heat
exchanger thermistor
Replace the outdoor unit
PC board. (Replace the
indoor unit PC board.)
(R4718)
205