Daikin Perfera FVXM A Series - Repair Procedures

3 | Components
Service manual
89
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
2 Turn ON the power of the unit.
3 Measure the power supply voltage between the pins 1‑4 on the humidity
sensor connector CN.
Result: The measured voltage MUST be 5VDC.
a
a Humidity sensor (PCB)
Is the measured power supply voltage
correct?
Action
Yes Skip the next step..
No Continue with the next step.
4 Measure the output voltage between between the pins 1‑4 on the connector
S600 on the indoor unit main PCB.
Result: The measured voltage MUST be 5VDC.
Is the output voltage on the indoor unit
main PCB correct?
Action
Yes Replace the humidity sensor wiring
harness, see "Repair
procedures"[489].
No Perform a check of the indoor unit main
PCB, see "Checking procedures"[4102].
5 As there are no further check procedures for this component, perform a check
of the indoor unit main PCB to check if the humidity sensor needs to be
replaced. See "Checking procedures"[4102].
After complete check of the indoor unit
main PCB, is the problem solved?
Action
Yes No further actions required.
No Replace the humidity sensor, see
"Repair procedures"[489].
3.7.2 Repair procedures
To remove the humidity sensor
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.