Viessmann Vitodens 300 Service Instructions Manual page 74

Troubleshooting
Call up current fault codes
Control unit faults
Fault on the burner control unit
74
(cont.)
1. Find current fault with c.
2. Select additional fault codes
with a and b.
3. Acknowledge fault.
The fault can be acknowledged
with d. The fault message in the
display will be hidden, but red fault
indicator A continues to flash. A
new fault message will be shown in
the display if an acknowledged fault
is not removed by 07:00 h the fol-
lowing day.
1. Find current fault with c.
2. Select additional fault codes
with a and b.
3. Acknowledge fault.
The fault can be acknowledged
with d. The fault message in the
display will be hidden, but red fault
indicator A continues to flash. A
new fault message will be shown in
the display if an acknowledged fault
is not removed by 07:00 h the fol-
lowing day.