Daikin Sky Air FAA71BUV1B Service Manual page 56

4 | Components
To check the wiring of the indoor unit main PCB
To check the rectifier voltage of the indoor unit main PCB
Service manual
56
Is the correct spare part for the indoor
unit main PCB installed?
Yes
No
Prerequisite: First perform all earlier checks of the indoor unit main PCB, see
"4.5.1 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" [ 93].
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
"4.5.1 Checking procedures" [
1 Turn ON the power of the unit.
2 Measure the voltage on the rectifier voltage check terminals (V DC out (+) and
V DC out (−)) on the indoor unit main PCB.
Result: The measured voltage MUST be approximately 324 V DC.
Action
Return to
procedures" [
main PCB and continue with the next
procedure.
Replace the indoor unit main PCB, see
"4.5.2 Repair
4
53].
Action
No further actions required.
Return to
procedures" [
main PCB and continue with the next
procedure.
4
53].
"4.5.1 Checking
4
53] of the indoor unit
4
procedures" [ 58].
"7.2 Wiring
"4.5.1 Checking
4
53] of the indoor unit
FAA71+100BUV1B
Sky Air indoor units
ESIE22-01 – 2022.02