Daikin Sensira Series, Service Manual, Page: 89 / 172

2 | Components
Service manual
89
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
a
e d
b
c
a U
b V
c W
d DC+
e DC–
INFORMATION
When measuring on the front of the main PCB, make sure to locally remove the
protective varnish with the test leads of the multi meter.
VDC Com Ref VDC Com Ref
U DC+ 0.501 V DC+ U O.L
V DC+ 0.501 V DC+ V O.L
W DC+ 0.501 V DC+ W O.L
DC– U 0.501 V U DC– O.L
DC– V 0.501 V V DC– O.L
DC– W 0.501 V W DC– O.L
Are the test results OK? Action
Yes Power module is OK. Return to
"Checking procedures" [
4
84] of the
main PCB and continue with the next
procedure.
No Replace the main PCB, see "Repair
procedures" [
4
89].
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.
Repair procedures
To remove the main PCB
Prerequisite: Stop the unit operation via the user interface.