Daikin Super Multi NX FFQ25B8V1B Service Manual page 362

Troubleshooting for Outdoor Unit
In case of " H9 " " J3 " " J6 " " J8 " " J9 "
Troubleshooting
Check No.01
Refer to P.362
J3 error: The discharge
pipe temperature is
lower than the heat
exchanger temperature.
H9
J3
J6
J8
J9
350
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 mode.
Indoor heat
exchanger thermistor
functioning?
YES
: Outdoor temperature thermistor
: Discharge pipe thermistor
: Outdoor heat exchanger thermistor
: Liquid pipe thermistor
: Gas pipe thermistor
NO
∗ Note
NO
NO
SiBE121021_C
Reconnect the connectors
or thermistors.
Replace the defective
one(s) of the following
thermistors.
• Outdoor temperature
thermistor
• Discharge pipe thermistor
• Outdoor heat exchanger
thermistor
• Liquid pipe thermistor
• Gas pipe thermistor
Replace the following
thermistor.
• Indoor heat exchanger
thermistor
Replace the outdoor unit
PCB.
(Replace the indoor unit
PCB.)
(R14415)
Service Diagnosis