Unit installation

35
Display Status
(single digit)
Service
(two digits)
See
Operating display in
standard mode
Current operating
condition, see
page 33 and 34
Display "FL" if a flame
signal is present
Page 34
Operating display for
operation deviating
from the standard con-
dition
Message code "A" or
"L", see the table on
page 40
— —
Service display Message code "d",
see page 35
Current level of modu-
lation
Page
35
Fault display For message code
"F", see the table on
page 40, display
flashes
Fault code display
flashes, see
page 40
Page
40
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
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.
Burner control unit
(cont.)
5692 907 GB