Daikin FTXP20-71L, Service Manual

Page: 84 / 192

3 | Components
Service manual
84
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Split Comfora R32
ESIE18-01E – 2023.01
3.7 Main PCB
3.7.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a power check of the main PCB
ARXP-L + ARXP-M + RXP-L + RXP-M + RXP50~71N units
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "3.9 Plate work" [
4
111].
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.
a
b
a Black wire
b White wire
Is the measured voltage on the PCB
correct? Action
Yes Return to "3.7.1 Checking
procedures" [
4
84] of the PCB and
continue with the next procedure.
No Continue with the next step.
3 Check the power supply to the unit, see "4.1.1 Checking procedures" [
4
142].
Does the unit receive power? Action
Yes Replace the main PCB, see "3.7.2 Repair
procedures" [ 4 96].
No Adjust the power supply to the unit, see
"4.1.2 Repair procedures" [
4
143].
ARXP20~35N + RXP20~35N units
Prerequisite: Stop the unit operation via the user interface.