Viessmann VITODENS 200-W Service Instructions Manual page 101

Fault codes
(cont.)
Dis- Const.
played
fault
code
E5 X
E7 X
E8 X
EA X
Eb X
EC X
Ed X
Weath.- System char-
comp. acteristics
X Burner blocked Fault, flame
X Burner in a fault
state
X Burner in a fault
state
X Burner in a fault
state
X Burner in a fault
state
X Burner in a fault
state
X Burner in a fault
state
Troubleshooting
Cause Measures
Replace the control
amplifier unit.
The ionisa- Check the ionisa-
tion current tion electrode and
lies outside cable.
the permissi- Press reset button
ble range dur- R.
ing calibra-
tion
The ionisa- Check the ionisa-
tion current tion electrode and
lies outside cable.
the permissi- Press reset button
ble range R.
The ionisa- Check the ionisa-
tion current tion electrode and
lies outside cable.
the permissi- Press reset button
ble range dur- R.
ing calibra-
tion
Heat draw-off Initiate a heat
repeatedly draw-off. Switch
too low during the boiler OFF and
calibration ON again.
Press reset button
R.
Parameter Press reset button
fault during R
calibration or
Replace boiler cod-
ing card and press
reset button R.
Internal fault Replace the control
unit.
101