Display
fault
code
Const.
Weath.-
comp.
System char-
acteristics
Cause
Remedy
Ed
X
X
Burner control
unit fault
Internal fault
Replace the con-
trol unit.
F0
X
X
Burner
blocked
Internal fault
Replace the con-
trol unit.
F1
X
X
Burner control
unit fault
Flue gas
temperature
limiter has
responded.
Check the heating
system fill level.
Vent the system.
Press reset but-
ton "
E
" after the
flue gas system
has cooled down.
F2
X
X
Burner control
unit fault
The tem-
perature lim-
iter has
responded.
Check the heating
system fill level.
Check the circula-
tion pump. Vent
the system.
Check the tem-
perature limiter
and connecting
cables.
Press "
E
".
F3
X
X
Burner control
unit fault
Flame signal
is already
present at
burner start.
Check the ionisa-
tion electrode and
lead.
Press "
E
".
F4
X
X
Burner control
unit fault
No flame sig-
nal.
Check the ionisa-
tion electrode and
lead, measure the
ionisation current,
check the gas
pressure, check
the gas combina-
tion valve, igni-
tion, ignition
module, ignition
electrodes and
the condensate
drain.
Press "
E
".
Fault codes
(cont.)
81
Troubleshooting
5692
569
GB
Содержание Vitodens 300
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