Viessmann Vitocrossal 200 Service Instructions Manual page 34

Initial start-up, inspection, maintenance
Burner control unit
Display
Operating display in
standard mode
Operating display for
operation deviating
from the standard
condition
Service display
Fault display
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 modu-
lation in %.
Display:
"d 00" lower output
"d 00." upper output (with the full
stop behind the last digit)
34
(cont.)
Status
(single digit)
Current operating
condition, see
pages 32 and 33
Message code "A" or
"L", see the table on
page 40
Message code "d",
see page 34
Message code "F",
see the table on
page 40, display
flashes
1. Press b and S simultaneously;
the burner enters manual mode.
The display shows "d" under status.
2. Adjust the lower output: Press b,
until "d 00" is shown.
3. Adjust the upper output: Press a,
until "d 00." is shown.
4. Press b and S simultaneously;
the burner returns to modulating
mode.
Service
(two digit)
Display "FL" if a
flame signal is pre-
sent
Actual level of modu-
lation
Fault code display
flashes, see page 40
See
Page 33
Page 34
Page 40