Viessmann Vitodens 300 Service Instructions Manual page 82

Troubleshooting
Checking and acknowledging faults
Displayed Const.
fault code
F1 X
F2 X
F3 X
82
Weat- System
her- character-
comp. istics
X Burner in
fault state
X Burner in
fault state
X Burner in
fault state
(cont.)
Cause Remedy
Flue gas tempera- Check the
ture limiter has heating sys-
responded tem water
level. Vent
the heating
system.
Press reset
E no sooner
than after
20 minutes.
Temperature limiter Check the
has responded heating sys-
tem water
level. Check
the circula-
tion pump.
Vent the heat-
ing system.
Check the
temperature
limiter and
leads.
Press E.
The flame signal is Check the
already present at ionisation
burner start electrode and
leads.
Press E.