Daikin FTXA25BB - Repair Procedures; Main PCB; Class 20~35 Units

2 | Components
Service manual
91
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
All LED’s of the inverter analyzer are lit
during inverter test?
Action
Yes Return to "2.11.1Checking
procedures"[489] of the inverter PCB
and continue with the next procedure.
No Replace the inverter PCB, see
"2.11.2Repair procedures"[491].
Problem solved?
After all checking procedures listed above have been performed:
Is the problem solved? Action
Yes No further actions required.
No Return to the troubleshooting of the
specific error and continue with the
next procedure.
2.11.2 Repair procedures
As the inverter PCB is integrated in the main PCB of the unit, see "2.12 Main
PCB"[491] for the repair procedures.
2.12 Main PCB
2.12.1 Class 20~35 units
Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a power check of the main 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.
Result: The measured voltage MUST be 230VAC.