Viessmann VITODENS 200-W Service Instructions Manual page 40

Codes
Code 2
(cont.)
Coding in the delivered condition
21:0 No maintenance interval
(hours run) selected
23:0 No time interval for
burner service selected
24:0 The service display is
reset
25:0 With outside temperature
sensor for constant tem-
perature control units: No
recognition of outside
temperature sensor or
fault monitoring
28:0 No burner interval igni-
tion
2E:0 Without external exten-
sion
2F:0 Venting program/fill pro-
gram disabled
30:0 Internal fixed speed circu-
lation pump (automatic
adjustment, do not mod-
ify)
32:0 Influence of the signal
"External blocking" on cir-
culation pumps: All
pumps in control function
Note
Generally, the burner will be blocked when signal "External blocking" is enabled.
40
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 step ≙ 100 h
23:1 Interval adjustable from 1
to to 24 months
23:24
24:1 "Service" display (the
value is automatically set
and must be manually
reset after a service has
been carried out)
25:1 Outside temperature sen-
sor and fault monitoring
recognised
28:1 Time interval adjustable
to from 1 to 24 h. The burner
28:24 is force-started once every
30 s (only when operating
with LPG)
2E:1 With external extension
(automatic setting on con-
nection)
2F:1 Venting program enabled
2F:2 Fill program enabled
32:1 Influence of the signal
to "External blocking" on cir-
32:15 culation pumps: See the
following table