Daikin Emura RXJ20A5V1B Service Manual page 122

4 | Components
To perform a power module check
Service manual
122
VDC Com
c a
4 If the diode module is NOT OK, replace the main PCB, see
4
procedures" [ 124].
Prerequisite: First check the rectifier voltage of the main PCB, see
4
procedures" [ 117].
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.
c b a
d
e
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.
Ref VDC
0.51~0.52 V a
Com Ref
c O.L
"Repair
"Checking
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04B – 2022.08