Viessmann FB2B Installation And Service Instructions Manual page 85

Select boiler
(cont.)
Coding in the delivered condition
21:0 No service interval (hours
run) selected
23:0 No time interval for
burner service
24:0 No "Service" display
28:0 No burner interval igni-
tion
2E:0 Never adjust
2F:0 Venting program/fill pro-
gram disabled
30:0 Never adjust
38:0 Status burner control unit:
Operational (no fault)
Possible change
21:1 The number of hours run
to before the burner should
21:100 be serviced is adjustable
from 100 to 10 000 h
One adjusting step ≙
100 h
23:1 Interval adjustable from 1
to to 24 months
23:24
24:1 "Service" display (the
address is automatically
set and must be manually
reset after a service has
been carried out)
28:1 Time interval adjustable
to from 1 h to 24 h. The burner
28:24 is force-started once every
30 s (only when operating
with LPG).
2F:1 Venting program enabled
2F:2 Fill program enabled
Status burner control unit:
38:≠0
Fault
Code 2
85