Daikin Split Sensira R32 Service Manual page 110

3 | Components
To perform a power module check
Service manual
110
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" [ 111].
Prerequisite: First check the rectifier voltage of the main PCB, see
4
procedures" [ 106].
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
(A)(F)TXF20~71A + FTXF20~25B + (A)(F)TXF20~42C + (A)(F)TXF20~42D +
(A)(F)TXF20~42E + (A)RXF20~71A + RXF20~60B + (A)RXF20~42C +
Com Ref
d O.L
b O.L
d O.L
c O.L
"Repair
"Checking
(A)RXF20~42D + (A)RXF20~42E
Split Sensira R32
ESIE18-12G – 2023.01