Daikin Sensira Series Service Manual page 88

2 | Components
To perform a power module check
Service manual
88
a
b
c
a V DC out (+)
b V AC in
c V AC in
d V DC out (–)
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
d b
b a
d c
c a
4 If the diode module is NOT OK, replace the main PCB, see
4
procedures" [ 89].
Prerequisite: First check the rectifier voltage of the main PCB, see
4
procedures" [ 84].
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.
2 Check the power module IPM1 in reference with the image and the table
below.
d
Ref VDC
0.51~0.52 V b
0.51~0.52 V a
0.51~0.52 V c
0.51~0.52 V a
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Com Ref
d O.L
b O.L
d O.L
c O.L
"Repair
"Checking
Split Sensira R32
ESIE18-12E – 2021.02