Buderus Logamax GB062-24 KDE H V2 Service Manual page 30

4
Fault finding
6A
Flame not detected.
Step
1. B Switch on the boiler.
Is flame visible ?
2. Check / measure the ionisaiton cur-
rent.
Is it correct ?
3. Is gas valve open ?
4. Is there air in the gas line ?
5. Is the termal gas valve triggered ?
(if a termal gas valve is installed)
30
Remedy
yes: --> 2.
no: --> 2.
B Switch off the boiler.
yes:
B Cut the m6Aain supply.
B Earth connection : Check the earth circuit connection.
If necessary, correct it.
B Switch on the main supply.
B Switch on the boiler again.
--> 3.
B Open the gas valve.
no:
B Press the RESET button and start the boiler again.
6A ? --> 3.
yes: --> 4.
no: B Open the gas valve.
B Press the RESET button and start the boiler again.
6A ? --> 4.
B Open the gas valve.
yes:
B Press the RESET button and start the boiler again. If
necessary, repeat this operatrion.
6A ? --> 5.
no: --> 5.
yes: B Replace the thermal gas valve.
B Press the RESET button and start the boiler again.
6A ? --> 6.
no: --> 6.
Logamax Plus GB062