Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 132

Troubleshooting
Fault codes
(cont.)
Dis- Const.
played
fault
code
EA X
Eb X
EC X
Ed X
132
Weath.- System char-
comp. acteristics
X Burner in a fault
state
X Burner in a fault
state
X Burner in a fault
state
X Burner in a fault
state
Cause Measures
Ionisation Check flue system;
current out- remedy flue gas re-
side permissi- circulation if re-
ble range dur- quired.
ing calibration In open flue opera-
(deviation tion, prevent high
from previous incidence of dust in
level too the combustion
great) air.
Press reset button
R
Following several
unsuccessful reset
attempts, replace
boiler coding card
and press reset
button R
Repeated Check gap be-
flame loss tween ionisation
during cali- electrode and
bration burner gauze as-
sembly (see
page 52).
Check allocation of
gas type (see
page 52).
Check flue system;
remedy flue gas re-
circulation if re-
quired.
Press reset button
R
Parameter Press reset button
fault during R or
calibration Replace boiler cod-
ing card and press
reset button R
Internal fault Replace control
unit