Viessmann Vitodens 200-W Installation Instructions Manual page 127

Fault codes
(cont.)
Dis- Const.
played
fault
code
E1 X
E2 X
E3 X
E4 X
E5 X
E6 X
Weath.- System char-
comp. acteristics
X Burner in a fault
state
X Burner in a fault
state
X Burner in a fault
state
X Burner blocked Fault, 24 V
X Burner blocked Fault, flame
X Burner blocked System pres-
Troubleshooting
Cause Measures
Ionisation Check gap be-
current too tween ionisation
high during electrode and
calibration burner gauze as-
sembly (see
page 46).
In open flue opera-
tion, prevent high
incidence of dust in
the combustion
air.
Press reset button
R.
Heating water Ensure adequate
flow rate too circulation volume.
low during Check flow switch.
calibration.
Flow switch Remove scaling
has shut and blockages.
down. Press reset button
R.
Heat transfer Ensure adequate
too low during heat transfer.
calibration. Press reset button
Temperature R.
limiter has
shut down.
Replace control
supply volt- unit.
age
Replace control
amplifier unit.
Top up with water.
sure too low
127