Daikin Sensira Series, Service Manual

Page: 67 / 172

2 | Components
Service manual
67
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
Is the problem solved? Action
No Return to the troubleshooting of the
specific error and continue with the
next procedure.
2.6 Indoor unit main PCB
2.6.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a power check of the indoor unit 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 "2.10 Plate work" [
4
101].
1 Turn ON the power of the unit.
2 Measure the voltage between the black and white wires on the PCB. The
measured voltage MUST be 230 V AC.
a
b
a Black wire
b White wire
Is the measured voltage on the indoor
unit PCB correct? Action
Yes Return to "2.6.1 Checking
procedures" [
4
67] of the indoor unit
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
127].