Daikin SUPER MULTI NX CTXS07JVJU Service Manual page 172

SiUS12-928_B
Troubleshooting
Check No.01
Refer to P.191
Check No.12
Refer to P.194
Service Diagnosis
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 outdoor electronic
expansion valve.
Functioning?
YES
Check No. 01
Check the outdoor heat
exchanger thermistor.
As described in
the thermistor
characteristic
chart?
YES
Check No. 01
Check the room temperature
thermistor.
As described in
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
Troubleshooting for Outdoor Unit
Activate the wiring error check
function.
Replace the outdoor 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.
(R17255)
164