110
Displayed
fault code
System characteris-
tics
Cause
Measures
E8
Burner in a fault
state
The ionisation cur-
rent lies outside the
permissible range
Check gas supply (gas
pressure and gas flow lim-
iter), gas train and con-
necting lead.
Check allocation of gas
type (see page 32).
Check ionisation elec-
trode:
■ Distance to burner
gauze assembly (see
page 40)
■ Contamination of elec-
trode
Press reset button
R
.
EA
Burner in a fault
state
Ionisation current
outside the permis-
sible range during
calibration (devia-
tion from previous
level too great)
Check flue system; rem-
edy flue gas recirculation
if required.
In open flue mode, pre-
vent very dusty conditions
for the combustion air.
Press reset button
R
.
Following several unsuc-
cessful reset attempts,
replace boiler coding card
and press reset button
R
.
Eb
Burner in a fault
state
Repeated flame
loss during calibra-
tion
Check gap between ioni-
sation electrode and
burner gauze assembly
(see page 40).
Check allocation of gas
type (see page 32).
Check flue system; rem-
edy flue gas recirculation
if required.
Press reset button
R
.
Troubleshooting
Fault codes
(cont.)
5412 755 GB
