Daikin Perfera RXM R Series, Service Manual

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3 | Components
Service manual
88
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
2 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
3 Wrap a wet rag around the high pressure switch and solder the high pressure
switch pipe to the refrigerant pipe.
b
c
b
a
a High pressure switch
b Faston connector
c High pressure switch pipe
CAUTION
Overheating the pressure switch will damage or destroy it.
4 After soldering is done, stop the nitrogen supply after the component has
cooled‑down.
5 Connect the Faston connectors to the high pressure switch.
6 Add refrigerant to the refrigerant circuit, see "Repair procedures" [
4
209].
7 Install the compressor insulation, see "Repair procedures" [ 4 55].
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.
3.7 Humidity sensor
3.7.1 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
"Checking procedures" [
4
102].
To perform a power check of the humidity sensor
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see "3.14 Plate work" [
4
151].