Troubleshooting
3
Subject to modifications resulting from technical improvements!
Buderus Ltd. • http://www.buderus-domestic.co.uk
34
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
Fig. 31
Fault warning message 7H: Voltage peaks in UBA
Flashing
Voltage peaks in UBA
Contact electricity supplier
and Buderus
Customer Service
Yes, on fourth attempt to start up
Remove the casing (page 48)
A
No
No
Yes
H
"reset"
New fault warning
message
7H
?
Check Mains voltage
(195 V to 253 V)
Mains voltage
OK?
600 Series
11S / 19S / 24S / 24C
OK
Yes,
on second and
third attempts
to start up
7
