Daikin 4MXL-T Series Service Manual page 231

SiUS121827E
Troubleshooting
In case of H9, J3, J6, J8, J9
J3 error: The discharge
pipe temperature is lower
than the heat exchanger
temperature.
H9 : Outdoor temperature thermistor
J3 : Discharge pipe thermistor
J6 : Outdoor heat exchanger thermistor
J8 : Liquid pipe thermistor
J9 : Gas pipe thermistor
Notes
When replacing the defective thermistor(s), replace the thermistors as ASSY.
Reference
Check No.01 Refer to P.232
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Turn on the power again.
Error displayed
again on remote controller?
YES
Check No. 01
Check the thermistor resistance
value.
Normal?
YES
Cooling: Outdoor heat
exchanger
thermistor
Heating: Indoor heat
exchanger
thermistor
Check No. 01
Check the indoor heat exchanger
thermistor resistance value in the
heating operation.
Indoor heat
exchanger thermistor
functioning?
YES
Troubleshooting for Outdoor Unit
NO
NO
NO
Reconnect the connectors
or thermistors.
Replace the defective
thermistor(s).
∗ Outdoor temperature
thermistor
∗ Discharge pipe thermistor
∗ Outdoor heat exchanger
thermistor
∗ Liquid pipe thermistor
∗ Gas pipe thermistor
Replace the indoor heat
exchanger thermistor.
Replace the outdoor unit
PCB (main PCB).
(R21118)
225