Daikin Perfera RXM20R, Service Manual

Page: 135 / 260

4 | Components
Service manual
135
RXM20~71R(9) + ARXM25~71R(9) + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11B – 2022.02
4.12.2 Class 42~71 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 "4.14 Plate work" [
4
153].
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 "Checking
procedures" [
4
135] of the PCB and
continue with the next procedure.
No Continue with the next step.
3 Check the power supply to the unit, see "5.1.1 Checking procedures" [
4
205].
Does the unit receive power? Action
Yes Replace the main PCB, see "Repair
procedures" [
4
140].
No Adjust the power supply to the unit, see
"5.1.2 Repair procedures" [
4
206].
To check the HAP LED of the main PCB
Prerequisite: First check the power supply to the main PCB, see "Checking
procedures" [ 4 135].
1 Locate the HAP LED on the main PCB.