Morco FEB-24E - Troubleshooting No Green LED

39
1. NO GREEN L.E.D DISPLAYED.
Is the main
control on?
IN
Turn it on and select
max DHW
temperature.
OUT
230V ac before
the electrical
filter?
Check electrical
supply to the boiler
and the fuse (3 amp).
230V ac after the
electrical filter.
Replace the electrical
filter.
230V ac at the 2 way
connector (J11) on
the main PCB.
Boiler works?
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
1. Check the wiring and the
connections between the main
PCB and the front panel
control PCB. If the wiring is
correct, replace the front
panel control PCB.
2. Replace the main PCB.
Boiler works but
no green L.E.D
Displayed.
Replace the front
panel control PCB.
Check the wiring and
connections between the
electrical filter and the
main PCB.