99
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 assignment of gas type (see
page 46).
Check ionisation electrode:
■
Distance to burner gauze assem-
bly (see page 52)
■
Electrode contamination
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 52).
Check assignment of gas type (see
page 46).
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 press re-
set button
R
.
Ed
Burner in a fault state
Internal fault
Replace control unit.
EE
Burner in a fault state
Flame signal at burner
start not present or insuffi-
cient.
Check gas supply (gas pressure
and gas flow switch).
Check gas train.
Check ionisation electrode and
connecting lead.
Check ignition:
■
Connecting cables to ignition
module and ignition electrode
■
Ignition electrode gap and con-
tamination (see page 53)
Check condensate drain.
Press reset button
R
.
Troubleshooting
Fault codes
(cont.)
5678 044 GB
Diagnosis
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
Page 163: ...163 5678 044 GB ...