Daikin FTXA20A - Page 82

2 | Components
Service manual
82
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 power supply to the indoor unit
correct?
Action
Yes Correct the wiring between the power
supply terminal of the indoor unit and
the indoor unit power PCB, see
"2.9.2Repair procedures"[484].
No See "To check the power supply to the
indoor unit" ("3.1.2Repair
procedures"[4157]) for the next steps.
To perform an electrical check of the indoor unit power PCB
Prerequisite: First perform a power check of the indoor unit power PCB, see
"2.9.1Checking procedures"[481].
1 Measure the voltage between the pins 1‑4 of the connector S102.
Result: The measured voltage MUST be 324VDC.
a
a Connector S102
Is the measured voltage on the indoor
unit power PCB correct?
Action
Yes Return to "2.9.1Checking
procedures"[481] of the indoor unit
power PCB and continue with the next
procedure.
No Replace the indoor unit power PCB, see
"2.9.2Repair procedures"[484].
To check if the correct spare part is installed
Prerequisite: First perform all earlier checks of the indoor unit main PCB, see
"2.9.1Checking procedures"[481].
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.
Is the correct spare part for the indoor
unit power PCB installed?
Action
Yes Return to "2.9.1Checking
procedures"[481] of the indoor unit
power PCB and continue with the next
procedure.