Daikin Emura RXJ20A5V1B Service Manual page 109

To perform an electrical check of the indoor unit power PCB
To check if the correct spare part is installed
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04B – 2022.08
Is the measured voltage on the indoor
unit power PCB correct?
No
3 Check the power supply to the indoor unit, see
4
procedures" [ 180].
Is the power supply to the indoor unit
correct?
Yes
No
Prerequisite: First perform a power check of the indoor unit power PCB, see
"4.10.1 Checking procedures" [
1 Measure the voltage between the pins 1‑4 of the connector S102.
Result: The measured voltage MUST be 324 VDC.
a Connector S102
Is the measured voltage on the indoor
unit power PCB correct?
Yes
No
Prerequisite: First perform all earlier checks of the indoor unit main PCB, see
"4.10.1 Checking procedures" [
1 Visit your local spare parts webbank.
2 Enter the model name of your unit and check if the installed spare part
number corresponds with the spare part number indicated in the webbank.
Action
Continue with the next step.
Action
Correct the wiring between the power
supply terminal of the indoor unit and
the indoor unit power PCB, see
"4.10.2 Repair
See "To check the power supply to the
indoor unit"
procedures" [
4
108].
Action
Return to "4.10.1 Checking
procedures" [
power PCB and continue with the next
procedure.
Replace the indoor unit power PCB, see
"4.10.2 Repair
4
108].
4 Components
|
"5.1.1 Checking
4
procedures" [ 111].
("5.1.2 Repair
4
181]) for the next steps.
a
4
108] of the indoor unit
4
procedures" [ 111].
Service manual
109