Viessmann VITODENS 200-W Service Instructions Manual page 44

Codes
Code 2
(cont.)
Coding in the delivered condition
0d:0 Function "Emergency
mode in case of insuffi-
cient system pressure"
disabled
0E:0 System pressure below
maximum value.
No access to the coding
11:≠9
addresses for the param-
eters of the combustion
controller
21:0 No maintenance interval
(operating hours) selec-
ted
23:0 No time interval for
burner service selected
44
Possible change
0d:1 Function "Emergency
mode in case of insufficient
system pressure" enabled.
Minimum system pressure,
see page 8.
The burner starts with the
lower output.
The fault message "A2" will
be displayed (see
page 75) as long as the
system operates in emer-
gency mode.
0E:1 Max. system pressure
exceeded during opera-
tion. Fault message "A4" is
displayed as long as the
max. system pressure is
exceeded.
For the max. permissible
operating pressure, see
the boiler type plate.
After the fault has been
removed, reset the coding
address manually to 0.
Note
The value is set automati-
cally.
11:9 Access open to the coding
addresses for the parame-
ters of the combustion con-
troller
21:1 The number of hours run
to before the burner should
21:100 be serviced is adjustable
from 100 to 10,000 h
1 step ≙ 100 h
23:1 Interval adjustable from 1
to to 24 months
23:24