Buderus Logamax GB062-24 KDE H V2 Service Manual page 35

EC
Internal fault (Internal fault in the program sequence or failure of the mains voltage).
Step
1. Is blinking error code in display ?
2. B Switch off the boiler.
B Is the ignition cable connection loose
or damaged ?
3. Check the O2 CO values at min. and
max. Are the values correct ?
B Switch off the boiler.
4.
B Cut the main voltage supply.
B Is there any damage on securty
valve (gas valve) or connection
cable?
5. Electronic board (PCB) is defect.
Logamax PLus GB062
Remedy
yes: B Reset the boiler and restart the boiler again.
EC ? --> 2.
no: --> 2.
yes: B Change the ignition cable and the connection or if
possible fix it.
B Switch on the boiler.
EC ? --> 3.
no: --> 3.
yes: --> 4.
B Correct he adjustment.
no:
EC ? --> 4.
B Change the connection cable to securty valve.
yes:
B Switch on the boiler.
EC? --> 5.
no: --> 5.
B Switch off the boiler.
B Cut the main voltage supply.
B Change the electronic board (PCB)
B Switch on the main voltage supply.
B Switch on the boiler.
B END.
4
Fault finding
35