Daikin Super Multi NX FFQ25B8V1B Service Manual page 346

Troubleshooting for Outdoor Unit
Troubleshooting
Check No.01
Refer to P.362
Check No.12
Refer to P.364
334
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check the wiring and piping.
Wrong wiring or
piping?
NO
Check No. 12
Check the electronic expansion
valve.
Functioning?
YES
Check No. 01
Check the outdoor heat
exchanger thermistor.
Does it conform
to the thermistor
characteristic
chart?
YES
Check No. 01
Check the room temperature
thermistor.
Does it conform
to the thermistor
characteristic
chart?
YES
Change the refrigerant to remove
moisture from the piping (after
drawing a vacuum).
Error again?
NO
YES
NO
NO
NO
YES
SiBE121021_C
Activate the wiring error check
mode.
Replace the electronic
expansion valve or coil.
Replace the outdoor heat
exchanger thermistor.
Replace the room temperature
thermistor.
Replace the room temperature
thermistor or indoor heat
exchanger thermistor.
Do the vacuum drying.
Replace the indoor unit PCB
and then start the wiring error
check function.
(R14557)
Service Diagnosis