Daikin Sensira Series - Page 79

2 | Components
Service manual
79
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
VDC Com Ref VDC Com Ref
d c 0.51~0.52V c d O.L
c a 0.51~0.52V a c O.L
4 If the diode module is NOT OK, replace the main PCB, see "Repair
procedures"[481].
To perform a power module check
Prerequisite: First check the rectifier voltage of the main PCB, see "Checking
procedures"[474].
Prerequisite: Stop the unit operation via the user interface.
1 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10VDC before proceeding.
Power module IPM1 for compressor
1 Disconnect the compressor connector from the main PCB.
2 Check the power module IPM1 in reference with the image and the table
below.
e
d abc
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