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
9
3
Troubleshooting
The following flow diagrams are provided for the purpose of
systematic troubleshooting.
Take the opportunity, while carrying out fault diagnosis, to
check that all that plugs and wiring terminals on the UBA are
connected correctly.
Each time a fault has been rectified, push the “reset”
button "
" to unblock the UBA and return it to standby mode.
Certain troubleshooting tasks must be carried out with the
600 Series 11S / 19S / 24S / 24C in heating mode.
When doing so, the chimney-sweep switch should be set to "
1
"
Remember to return the chimney-sweep switch to “
0
” once
work is complete.
WARNING
Switch off the 600 Series 11S / 19S / 24S / 24C
BEFORE checking the connections.
NOTE
The system
cannot
be reset by disconnecting
at the master switch.
Fig. 6
Chimney sweeper switch on UBA
0
1
