24
Display
Status
(single digit)
Service
(two digits)
See
Operating display in
standard mode
Current operating
state; see pages 22
and 23
Display "FL" if a flame
signal is present
Operating display for
operation deviating
from the standard state
Message code "A" or
"L"; see the table on
page 29
—
—
Service display
Message code "d";
see page 24
Current modulation
level
Page
24
Fault display
Message code "F";
see table on
page 29;
display flashes
Fault code
Display flashes
See page 29
Page
29
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 modulation level in %.
Display:
"d 00"
Lower output
"d 00."
Upper output (with full stop behind 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 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.
DIP switch setting or parameter set
The DIP switch (on the back of the display and programming unit) is factory set to the
rated output of the burner. A change to this factory setting is only required for oper-
ation with reduced output.
Burner control unit
Burner control unit MPA 51
(cont.)
5692 488 GB
