Daikin FTXA20A - Indoor Unit Power PCB; Checking Procedures

2 | Components
Service manual
81
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 problem solved? Action
No Return to "2.8.1Checking
procedures"[475] of the indoor unit
main PCB and continue with the next
procedure.
2.9 Indoor unit power PCB
2.9.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a power check of the indoor unit power PCB
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.14Plate work"[4120].
1 Turn ON the power of the unit.
2 Measure the voltage between the black and white wires of connector S101 on
the indoor unit power PCB.
Result: The measured voltage MUST be 230VAC.
a b
a Black wire
b White wire
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 Continue with the next step.
3 Check the power supply to the indoor unit, see "3.1.1 Checking
procedures"[4156].