Viessmann VITOCROSSAL 200 Service Instructions Manual page 35

Burner control unit
Display
Operating display in
standard mode
Operating display for
operation deviating
from the standard con-
dition
Service display
Fault display
Manual mode and service display
A heat demand must be issued by the control unit to call up the service display and
for manual mode. The service display shows the current modulation level in %.
Display:
"d 00" Lower heating output
"d 00." Upper heating output (with the full stop behind the last digit)
Status Service
(cont.)
Status
(single digit)
Current operating
condition, see
page 33 and 34
Message code "A" or
"L", see the table on
page 40
Message code "d",
see page 35
For message code
"F", see the table on
page 40, display
flashes
Service
(two digits)
Display "FL" if a flame
signal is present
—
Current level of modu-
lation
Fault code display
flashes, see
page 40
1. Press b and S simultaneously; the
burner enters manual mode. The dis-
play shows "d" under Status.
2. Adjust the lower heating output:
Press b until the display shows
"d 00".
3. Adjust the upper heating output:
Press a until the display shows
"d 00.".
4. Press b and S simultaneously; the
burner returns to modulating mode.
See
Page 34
—
Page
35
Page
40
35