Daikin FTX-N/U Manual page 452

FTX-N/U, FVXS-N, FDMQ-R Series
Wiring method
Connect the extension cable connector side to the indoor unit PCB (printed circuit board)
For connection to the indoor unit, follow the procedure shown below.
Caution
!
1) Make sure to turn off the power supply before starting the wiring work and do not turn on until all the work is completed.
Read also the installation manual and the wiring diagram of the indoor unit when carrying out the work.
2) When wiring the extension cable, do not pass where the extension cable may be affected by the power line or noise.
3) Make sure to securely connect the connectors.
Defective connection may result in incorrect detection of room temperature or malfunction.
4) Do not splice wires.
5) Since the connector marking of the thermistor for detection of inlet air temperature differ depending on the indoor unit type,
make sure to check the indoor unit wiring diagram and follow it correctly.
6) Lay and clamp the extension cable inside the indoor unit switch box just like the low voltage line (cord for remote
controller).
And do not pass where the extension cable inside the indoor unit switch box may be affected by the power line (cord for
the indoor unit and the other electric line).
<Procedure>
1) When wiring to the indoor unit PCB, remove the existing thermistor (for detection of inlet air temperature) and then connect
the extension cable.
When doing this work, make sure to check the symbol of connecting address on the PCB whether it is correct or not
referring to the wiring diagram.
<For SkyAir and VRV>
Connector connection
Extension cable
Screwed terminal
connection
2) Lay and clamp the extension cable inside the indoor unit switch box just like the existing thermistor.
When doing this work, keep a certain distance between the high voltage wiring and the low voltage wiring to avoid error of
sensor.
Provide protection of the existing cable for thermistor without affecting other components.
3) Fit the sensor box cover into the sensor box.
Operation test after mounting the sensor
Conduct cooling and heating operation test after the sensor is mounted and the wiring is completed.
Indoor unit
Printed circuit board (PCB)
Extension cable
2 Connect
Existing thermistor or
humidity sensor
450
Indoor unit
1 Remove
EDUS091558E
3K019189-1D