129
Dis-
played
fault
code
Const.
Weath.-
comp.
System char-
acteristics
Cause
Measures
E7
X
X
Burner in a fault
state
Ionisation
current too
low during
calibration
Check ionisation
electrode:
■ Distance to burn-
er gauze assem-
bly (see page 46)
■ Contamination of
electrode
■ Connecting lead
and plug-in con-
nections
Check flue system;
remedy flue gas re-
circulation if re-
quired.
Press reset button
R
.
E8
X
X
Burner in a fault
state
The ionisa-
tion current
lies outside
the permissi-
ble range
Check gas supply
(gas pressure and
gas flow limiter),
gas train and con-
necting lead.
Check allocation of
gas type (see
page 37).
Check ionisation
electrode:
■ Distance to burn-
er gauze assem-
bly (see page 46)
■ Contamination of
electrode
Press reset button
R
.
Troubleshooting
Fault codes
(cont.)
5623 520 GB
Service
