Main Pcb; Class 20~42 Units - Daikin Split Sensira R32 Service Manual

3.8 Main PCB

3.8.1 Class 20~42 units

Checking procedures
To perform a power check of the main PCB
(A)(F)TXF20~71A + FTXF20~25B + (A)(F)TXF20~42C + (A)(F)TXF20~42D +
(A)(F)TXF20~42E + (A)RXF20~71A + RXF20~60B + (A)RXF20~42C +
(A)RXF20~42D + (A)RXF20~42E
Split Sensira R32
ESIE18-12G – 2023.01
Is the problem solved?
No
INFORMATION
It is recommended to perform the checks in the listed order.
(A)RXF20~35A + RXF20+25B + (A)RXF20~42C + (A)RXF42D units
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
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.
b
a
a Black wire
b White wire
Is the measured voltage on the PCB
correct?
Yes
No
3 Check the power supply to the unit, see
3 |
Action
Return to "3.7.1 Checking
4
procedures" [ 84] of the indoor unit
main PCB and continue with the next
procedure.
"3.10 Plate work" [
Action
Return to "Checking
4
procedures" [ 89] of the PCB and
continue with the next procedure.
Continue with the next step.
"4.1.1 Checking procedures" [
Components
4
124].
4 153].
Service manual
89