Daikin FTXA20A, Service Manual

Page: 78 / 192

2 | Components
Service manual
78
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
Is the correct spare part for the indoor
unit PCB installed? Action
Yes Return to "2.8.1 Checking
procedures" [
4
75] of the indoor unit
PCB and continue with the next
procedure.
No Replace the indoor unit PCB, see
"2.8.2 Repair procedures" [
4
78].
To check the wiring of the indoor unit main PCB
Prerequisite: First perform all earlier checks of the indoor unit main PCB, see
"2.8.1 Checking procedures" [
4
75].
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Check that all wires are properly connected and that all connectors are fully
plugged‑in.
2 Check that no connectors or wires are damaged.
3 Check that the wiring corresponds with the wiring diagram, see "5.2 Wiring
diagram" [
4
171].
INFORMATION
Correct the wiring as needed.
Is the problem solved? Action
Yes No further actions required.
No Return to "2.8.1 Checking
procedures" [ 4 75] of the indoor unit
main PCB and continue with the next
procedure.
Problem solved?
After all checking procedures listed above have been performed:
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.
2.8.2 Repair procedures
To remove the indoor unit main PCB
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.14 Plate work" [
4
120].
1 Disconnect all connectors from the indoor unit main PCB.
2 Carefully click the indoor unit main PCB out of the PCB retainers.