Daikin altherma 3 M Service Manual page 188

3 | Components
To perform a power module check
Service manual
188
c
d
a
b
a V AC in (anode of D801)
b V AC in (N = X802A: 2)
c V DC out (+)
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
a c
b c
d a
d b
2 If a diode module is NOT OK, replace the main PCB, see
4
procedures" [ 190].
Prerequisite: First check the rectifier voltage of the main PCB, see
4
procedures" [ 181].
Prerequisite: Stop the unit operation via the user interface.
1 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see
electrical hazards" [
Power module V3R for compressor
1 Disconnect the compressor Faston connectors from the main PCB.
2 Check the power module V3R in reference with the image and the table
below.
Ref VDC
0.505 V c
0.505 V c
0.567 V a
0.567 V b
4
285].
Com Ref
a O.L
b O.L
d O.L
d O.L
"Repair
"Checking
"To prevent
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03