Daikin Perfera RXM R Series, Service Manual

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3 | Components
Service manual
197
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
▪
Install all other thermistors wired to the connector in their thermistor
holder,
▪
Route the thermistor harness of all thermistors towards the appropriate
PCB,
▪
Connect the thermistor connector to the appropriate PCB.
WARNING
When reconnecting a connector to the PCB, make sure to connect it on the correct
location and do NOT apply force, as this may damage the connector or connector
pins of the PCB.
9 Fix the thermistor harness using new tie straps
10 Install the insulation around the thermistor.
11 Fix the insulation and the thermistor wire using new tie straps.
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.
3.20 Wifi control PCB
3.20.1 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 wifi control PCB needs to be
replaced. See
"Checking procedures" [
4
102].
To perform a power check of the wifi control PCB
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].
2 Turn ON the power of the unit.
3 Measure the power supply voltage between the pins 4‑5 on the wifi control
PCB connector.
Result: The measured voltage MUST be 10~16 V DC.