Daikin Perfera RXM R Series Service Manual page 137

To perform a power module check
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
VDC Com
b a
d c
c a
4 If the diode module is NOT OK, replace the main PCB, see
4
procedures" [ 138].
Prerequisite: First check the rectifier voltage of the main PCB, see
4
procedures" [ 132].
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.
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
U DC+
V DC+
W DC+
DC– U
Ref VDC
0.51~0.52 V
0.51~0.52 V
0.51~0.52 V
e
Ref VDC
0.501 V DC+
0.501 V DC+
0.501 V DC+
0.501 V
3 Components
|
Com
a b
c d
a c
a
b
c
d
Com
U
V
W
U DC–
Ref
O.L
O.L
O.L
"Repair
"Checking
Ref
O.L
O.L
O.L
O.L
Service manual
137