Viessmann 7838380 Notice De Montage page 19

Additional fault codes
Dis- System charac-
played teristics
fault
code
EA Burner in a fault
state
Eb Burner in a fault
state
For further information on trou-
bleshooting, see the boiler serv-
ice instructions.
(cont.)
Cause of fault
Ionisation current not
within permissible
range during calibration
(excessive deviation
from previous level)
Repeated flame loss
during calibration
Measure
Check flue system; re-
move flue gas recircula-
tion if necessary.
In open flue operation,
prevent high levels of
dust in the combustion
air.
Press reset button R.
If several reset attempts
are unsuccessful, re-
place the boiler coding
card and press reset but-
ton R.
Check gap between ioni-
sation electrode and
burner gauze assembly
(see service instruc-
tions).
Check the allocation of
the gas type.
Check flue system; re-
move flue gas recircula-
tion if necessary.
Press reset button R.
GB
19