Viessmann VITODENS 333 Service Instructions Manual page 38

Initial start-up, inspection, maintenance
Further details regarding the individual steps
1. Press c.
Maintenance scan is activated.
2. Scan maintenance messages
with a or b.
3. Press d, for weather-compen-
sated control units also confirm the
display "Acknowledge: Yes"
with d.
"Maintenance" is cancelled from
the display, and the red fault indica-
tor continues to flash.
Note
An acknowledged maintenance
message can be redisplayed by
pressing d (approx. 3 seconds).
38
(cont.)
After maintenance has been carried
out
1. Reset code 24:1 to 24:0.
The red fault indicator is extin-
guished.
Note
If coding address 24 is not reset, a
new "Maintenance" message will
be displayed on Monday at
07:00 h.
2. If required:
Press c.
&
&
Reset burner hours run, burner
starts and consumption (see
page 69).
Press c.
&