Viessmann FB2B Installation And Service Instructions Manual page 111

Fault codes
(cont.)
Displayed System characteris-
fault code tics
EC Burner in a fault
state
Ed Burner in a fault
state
EE Burner in a fault
state
EF Burner in a fault
state
Cause Measures
Parameter fault Press reset button R
during calibration or
Replace boiler coding
card and press reset but-
ton R.
Internal fault Replace the control unit.
Flame signal is not Check gas supply (gas
present or too pressure and gas flow lim-
weak at burner iter);
start check gas train.
Check the ionisation elec-
trode and connecting
cable.
Checking ignition:
■ Connecting leads to
■ Distance to ignition
Check condensate drain.
Press reset button R.
The flame is lost Check gas supply (gas
immediately after it pressure and gas flow lim-
has built (during iter).
the safety time). Check flue gas/ventilation
air system for flue gas
recirculation.
Check ionisation elec-
trode (replace if required):
■ Distance to burner
■ Contamination of elec-
Press reset button R.
Troubleshooting
ignition module and
ignition electrode
electrode and contami-
nation (see page 40).
gauze assembly (see
page 40)
trode
111