Troubleshooting
3
Subject to modifications resulting from technical improvements!
Buderus Ltd. • http://www.buderus-domestic.co.uk
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
29
Fig. 26
Fault warning message 6H: Flame dies out after main gas valve is opened
Yes
If the required connection
pressure is not available, con-
tact your gas utility company
No
No
No
Yes
Yes
Measure the gas connection
pressure
Gas-air ratio
OK?
Open gas valve
completely
6 H
Flame dies out after main gas
valve is opened
"reset"
Remove the casing (page 48)
Put system into chimney sweeper mode
Fit the casing
"reset"
Check gas-air injector for correct
fitting; check for correct diameter
Adjust gas/air ratio as indi-
cated in the installation and
servicing instructions
Check gas/air ratio as indicated in
the installation and servicing
instructions
600 Series
11S / 19S / 24S / 24C
OK
Is the gas-supply shutoff valve
completely open?
Are the minimum-
pressure specifications being
observed (17 mbar min. for
natural gas)?
