Viessmann VITODENS 222-F Installation And Service Instructions Manual page 114

Troubleshooting
Fault codes
(cont.)
Dis- Const.
played
fault
code
Eb X
EC X
Ed X
114
Weath.- System char-
comp. acteristics
X Burner in a fault
state
X Burner in a fault
state
X Burner in a fault
state
Cause Measures
Repeated Check gap
flame loss between ionisation
during cali- electrode and
bration burner gauze
assembly (see
page 38).
Check allocation of
gas type (see
page 30).
Check flue system;
remedy flue gas
recirculation if
required.
Press reset button
R.
Parameter Press reset button
fault during R
calibration or
Replace boiler cod-
ing card and press
reset button R.
Internal fault Replace control
unit.