Viessmann VITODENS 200-W Service Instructions Manual page 102

Troubleshooting
Fault codes
(cont.)
Dis- Const.
played
fault
code
EE X
EF X
F0 X
F1 X
102
Weath.- System char-
comp. acteristics
X Burner in a fault
state
X Burner in a fault
state
X Burner blocked Internal fault
X Burner in a fault
state
Cause Measures
Flame signal Check the ionisa-
is not present tion electrode and
or too weak at connecting cable,
burner start measure the ioni-
sation current,
check the gas sup-
ply (gas pressure
and gas flow lim-
iter), check the gas
train, ignition, igni-
tion module, igni-
tion electrodes and
the condensate
drain.
Press reset button
R.
The flame is Check the gas sup-
lost immedi- ply (gas pressure
ately after it and gas flow lim-
has built (dur- iter), check the flue
ing the safety gas/ventilation air
time). system for flue gas
recirculation,
check the ionisa-
tion electrode
(replace if
required).
Press reset button
R.
Replace the control
unit.
Flue gas tem- Check the heating
perature lim- system fill level.
iter has Vent the system.
responded. Press reset button
R after the flue sys-
tem has cooled
down.