Daikin FTXZ25NV1B Service Manual page 172

Troubleshooting
Troubleshooting
Check No.01
Refer to P.181
J3 error: the discharge
pipe temperature is
lower than the heat
exchanger temperature.
H9
J3
J6
J8
157
In case of H9, J3, J6, J8
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
temperature
Heating: Indoor heat
exchanger
temperature
Check No. 01
Check the indoor heat exchanger
thermistor resistance value in the
heating operation.
Indoor heat
exchanger thermistor
functioning?
YES
: Outdoor temperature thermistor
: Discharge pipe thermistor
: Outdoor heat exchanger thermistor
: Liquid pipe thermistor
NO
NO
NO
SiMT041311E
Reconnect the connector
and thermistor.
Replace the thermistor.
Replace the indoor heat
exchanger thermistor.
Replace the outdoor unit
PCB.
(R19731)
Service Diagnosis