Daikin Sky Air FAA71BUV1B Service Manual page 57

To perform a diode module check
FAA71+100BUV1B
Sky Air indoor units
ESIE22-01 – 2022.02
a V DC out (+) terminal
b V DC out (−) terminal
Is the rectifier voltage on the indoor
unit main PCB correct?
Yes
No
1 First check the rectifier voltage of the indoor unit main PCB, see
"4.5.1 Checking procedures" [
INFORMATION
If the rectifier voltage is OK, the diode module is OK. If rectifier voltage is NOT OK,
proceed as described in the rectifier voltage check procedure.
Below procedure describes how to check the diode module itself.
Prerequisite: Stop the unit operation via the user interface.
2 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
3 Check the diode module in reference with the image and the table below.
b a
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].
4 Components
|
"4.5.1 Checking
4
53] of the indoor unit
4
procedures" [ 58].
Service manual
57