Daikin FTXA20A Service Manual page 83

To check the wiring of the indoor unit power PCB
To check the fuse of the indoor unit main PCB
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 power PCB installed?
No
Prerequisite: First perform all earlier checks of the indoor unit main PCB, see
"2.9.1 Checking procedures" [
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
4
diagram" [ 171].
INFORMATION
Correct the wiring as needed.
Is the problem solved?
Yes
No
Prerequisite: First perform all earlier checks of the indoor unit main PCB, see
"2.9.1 Checking procedures" [
1 Measure the continuity of the fuse. If no continuity is measured, the fuse has
blown.
a
a Fuse F1U
Blown fuse on the indoor unit power
PCB?
Yes
Action
Replace the indoor unit power PCB, see
"2.9.2 Repair
4
81].
Action
No further actions required.
Return to "2.8.1 Checking
procedures" [
power PCB and continue with the next
procedure.
4
81].
Action
Replace the blown fuse, see
"2.9.2 Repair
2 Components
|
4
procedures" [ 84].
"5.2 Wiring
4
75] of the indoor unit
4
procedures" [ 84].
Service manual
83