Daikin RXTA30B2V1B, Service Manual

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4 | Components
Service manual
87
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
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
"4.7.2 Repair
procedures" [
4
87].
No Perform a check of the indoor unit main
PCB, see
"4.10.1 Checking
procedures" [
4
97].
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
"4.10.1 Checking procedures" [
4
97].
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
"4.7.2 Repair procedures" [ 4 87].
4.7.2 Repair procedures
To remove the humidity sensor
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "4.17 Plate work" [
4
144].
1 Disconnect the connector from the humidity sensor PCB.