72
Fault code dis-
played
System characteristics
Cause
Measures
E8
Burner in a fault state
Ionisation current lies out-
side the permissible range
Check gas supply (gas pressure
and gas flow switch), gas train and
connecting cable.
Check ionisation electrode for the
following:
■
Distance to burner gauze assem-
bly (see page 24)
■
Contamination on electrode
Press reset button
R
.
EA
Burner in a fault state
Ionisation current not with-
in permissible range dur-
ing calibration (excessive
deviation from previous
level)
Check flue system; remove flue
gas recirculation if required.
In open flue operation, prevent
high levels of dust in the combus-
tion air.
Press reset button
R
.
Following several unsuccessful re-
set attempts, replace the coding
card and press reset button
R
.
EB
Burner in a fault state
Repeated flame loss dur-
ing calibration
Check gap between ionisation
electrode and burner gauze as-
sembly (see page 24).
Check flue system; remove flue
gas recirculation if required.
Press reset button
R
.
EC
Burner in a fault state
Parameter error during
calibration
Press reset button
R
.
or
Replace coding card and then
press reset button
R
.
ED
Burner in a fault state
Internal fault
Replace control unit.
EE
Burner in a fault state
Flame signal is not
present or insufficient at
burner start.
Check gas supply (gas pressure
and gas flow switch).
Check gas train.
Check ionisation electrode and
connecting cable.
Check ignition:
■
Connecting cables to ignition
module and ignition electrode
■
Ignition electrode gap and con-
tamination (see page 24).
Check condensate drain.
Press reset button
R
.
Troubleshooting
Fault codes
(cont.)
5839829
Diagnosis
