Daikin RXTA30B2V1B, Service Manual

Page: 123 / 264

4 | Components
Service manual
123
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
a
a Intelligent thermal sensor assembly
4 Measure the power supply voltage between the pins 1‑4 on the intelligent
thermal sensor connector S800.
Result: The measured voltage MUST be 4~6 V DC.
Is the measured power supply voltage
correct? Action
Yes Skip the next step.
No Continue with the next step.
5 Measure the output voltage between between the pins 1‑4 on the connector
on the indoor unit main PCB.S600
Result: The measured voltage MUST be 4~6 V DC.
Is the output voltage on the indoor unit
main PCB correct? Action
Yes Replace the intelligent thermal sensor
wiring harness, see
"4.13.2 Repair
procedures" [
4
123].
No Perform a check of the indoor unit main
PCB, see
"4.10.1 Checking
procedures" [
4
97].
6 As there are no further check procedures for this component, first perform a
check of the indoor unit PCB to check if the intelligent thermal sensor needs
to be replaced. See
"4.10.1 Checking procedures" [
4
97].
After complete check of the indoor unit
PCB, is the problem solved? Action
Yes No further actions required.
No Replace the intelligent thermal sensor,
see
"4.13.2 Repair procedures" [
4
123].
4.13.2 Repair procedures
To remove the intelligent thermal 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].