Daikin FTXA20A - Humidity Sensor; Checking Procedures

2 | Components
Service manual
70
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
3 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02MPa.
4 Wrap a wet rag around the high pressure switch and any other components
near the high pressure switch and solder the high pressure switch pipe to the
refrigerant pipe.
a
c
b b
a High pressure switch
b Faston connector
c High pressure switch pipe
CAUTION
Overheating the pressure switch will damage or destroy it.
5 After soldering is done, stop the nitrogen supply after the component has
cooled‑down.
6 Connect the Faston connectors to the high pressure switch.
7 Perform a pressure test, see "3.2.1Checking procedures"[4158].
8 Add refrigerant to the refrigerant circuit, see "3.2.2 Repair
procedures"[4162].
Is the problem solved? Action
Yes No further actions required.
No Return to the troubleshooting of the
specific error and continue with the
next procedure.
2.6 Humidity sensor
2.6.1 Checking procedures
1 As there is no specific check procedure for this component, first perform a
check of the indoor unit main PCB to check if the humidity sensor needs to be
replaced. See "2.8.1Checking procedures"[475].
To perform a power check of the humidity sensor
Prerequisite: Stop the unit operation via the user interface.