Daikin Altherma 3 M - Page 176

3 | Components
Service manual
176
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
3 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see "To prevent
electrical hazards"[4285].
4 Disconnect the NC wire from the main PCB.
5 Check the diode module in reference with the image and the table below.
a
d
c
b
a VDC out (+)
b VAC in (L803 coil leads)
c VAC in (NC)
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 Ref VDC Com Ref
d b 0.47V b d O.L
b a 0.82V a b O.L
d c 0.47V c d O.L
c a 0.82V a c O.L
6 If the diode module is NOT OK, replace the main PCB, see "Repair
procedures"[4178].
To perform a power module check
Prerequisite: First check the rectifier voltage of the main PCB, see "Checking
procedures"[4171].