Buderus Logamax GB062-24 KDE H V2 Service Manual page 36

4
Fault finding
6C
228
Flame detected even when the burner is switched off.
Step
1. B Switch off the boiler.
B Remove the electrode set .
B Check the ionization electorode.
Is there any crack, wear or con-
tamination ?
B Switch off the boiler.
2.
B Remove the electronic board (PCB) .
B Check the electronic board
(PCB).
Is there any moisture or water
drops on PCB?
2. Electronic board (PCB).
36
Remedy
yes: B Replace the ionisazation electrode.
B Install the electrode set again.
B Switch on the boiler.
6C ? -->2.
no: 6C ? --> 2.
B Dry the PCB or if necessary replace it.
yes:
B Install the PCB again.
B Switch on the boiler.
6C ? -->3.
no: 6C ? --> 3.
B Switch off the boiler.
B Cut the main voltage supply.
B Change the electronic board (PCB)
B Check the cable lugs (grommets) that provide sealing to
the housing where the cables pass through the control
unit. If necessary, change it.
B Switch on the main voltage supply.
B Switch on the boiler.
B END.
Logamax Plus GB062