Troubleshooting
3
Subject to modifications resulting from technical improvements!
Buderus Ltd. • http://www.buderus-domestic.co.uk
60
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
3.1.26 Checking the gas-burner control system for
correct activation
z
Set the mains switch to “
0
”.
z
Connect the multimeter (AC) to the plug-and-socket power-
supply connection to the gas burner fitting.
z
Turn the mains power switch to “
I
”.
z
Set the chimney-sweep switch to “
I
”.
z
Start up the device. Take a reading after about 30 seconds
of running time.
z
If the voltage reading is 24 V, the control system of the gas
burner fitting is in order.
z
When the test is complete, set the mains switch to “
0
”.
3.1.27 Replacing the gas burner fitting
z
Shut the gas cock.
z
Disconnect the system from the power supply.
z
Disconnect the fan using the plug and socket (fig. 77,
item 1), loosen the UBA control line at the fan (fig. 77,
item 2) and the gas burner fitting (fig. 77, item 3).
z
Loosen the union nut (fig. 77, item 4) on the gas burner
fitting.
Fig. 76 600 Series 11S / 19S / 24S / 24C:
Checking the gas-burner assembly for correct
activation
Fig. 77 Replacing the gas burner fitting on the 600 Series:
Loosen plug and union nut
1
2
3
4
DANGER !
All work on the gas supply must be carried out
by a CORGI registered engineer.
