Viessmann Vitocrossal 300 Service Instructions For Contractors page 102

Troubleshooting
Fault codes
(cont.)
Displayed System characteris-
fault code tics
Eb Burner in a fault
state
EC Burner in a fault
state
Ed Burner in a fault
state
EE Burner in a fault
state
102
Cause
Repeated flame
loss during calibra-
tion
Parameter fault
during calibration
Internal fault
Flame signal is not
present or too
weak at burner
start
Measures
Check gap between ioni-
sation electrode and
burner gauze assembly
(see page 21).
Check allocation of gas
type (see page 12).
Check flue system; rem-
edy flue gas recirculation
if required.
Press reset button R
Press reset button R
or
Replace boiler coding
card and press reset but-
ton R.
Replace control unit
Check gas supply (gas
pressure and gas flow lim-
iter);
Check gas train.
Check ionisation elec-
trode and connecting
cable.
Check ignition:
■ Connecting leads to
ignition module and
ignition electrode
■ Distance to ignition
electrode and contami-
nation (see page 21).
Check condensate drain.
Press reset button R