Daikin Perfera RXM R Series Service Manual page 128

3 | Components
To perform a power module check
Service manual
128
a
b
c
d
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" [ 131].
Prerequisite: First check the rectifier voltage of the main PCB, see
procedures" [ 4 123].
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.
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
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
b
a
c
Com Ref
d O.L
b O.L
d O.L
c O.L
"Repair
"Checking
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01