Viessmann VITOCROSSAL 200 Service Instructions Manual page 38

Burner control unit
Manual mode and service display
To call up the service display and for manual mode, a heat demand must be issued
by the control unit. The service display shows the current level of modulation in %.
Display:
"d 0" Lower output
"d 00" Upper output
Status Service
Fault display
The fault display is activated automatically if the burner control unit switches to a fault
state. The most recent fault will then be displayed.
Status Service
A Fault code of the most recent fault (see table on page 41)
38
(cont.)
1. Press b and S simultaneously; the
2. Adjust the lower output: Press b
3. Adjust the upper output: Press a
4. Pressing b and S simultaneously
burner enters manual mode. The dis-
play shows "d" = control stop under
status.
until "d 0" is shown.
until "d 00" is shown.
returns the burner to modulating
mode, where it continues to the orig-
inal modulation level, at which the
status "d" = control stop was initi-
ated.