Operating instructions

126
Dis-
played
fault
code
Const. Weath.-
comp.
System char-
acteristics
Cause Measures
EF X X Burner in a fault
state
Flame is lost
immediately
after it has
formed (dur-
ing the safety
time).
Check gas supply
(gas pressure and
gas flow switch).
Check balanced
flue system for flue
gas recirculation.
Check ionisation
electrode (replace
if required):
■ Distance to burn-
er gauze assem-
bly (see page 42)
■ Contamination of
electrode
Press reset button
R.
F0 X X Burner blocked Internal fault Replace control
unit.
F1 X X Burner in a fault
state
Flue gas tem-
perature limit-
er has re-
sponded.
Check heating sys-
tem fill level. Vent
the system.
Press reset button
R after flue system
has cooled down.
F2 X X Burner in a fault
state
Temperature
limiter has re-
sponded.
Check heating sys-
tem fill level. Check
circulation pump.
Vent the system.
Check temperature
limiter and con-
necting cables.
Press reset button
R.
Troubleshooting
Fault codes
(cont.)
5772 909 GB