Humidity Sensor; Checking Procedures - Daikin RXM20R Service Manual

4.7 Humidity sensor

4.7.1 Checking procedures

To perform a power check of the humidity sensor
RXM20~71R(9) + ARXM25~71R(9) + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11B – 2022.02
Is the problem solved?
No
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see
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 Humidity sensor (PCB)
Is the measured power supply voltage
correct?
Yes
No
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?
Yes
Action
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"4.14 Plate work" [
a
Action
Skip the next step..
Continue with the next step.
Action
Replace the humidity sensor wiring
harness, see "4.7.2 Repair
4
procedures" [
4 Components
|
4
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Service manual
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