Viessmann Vitodens 200 Service Instructions Manual page 34

Commissioning, inspection, maintenance
Further details regarding the individual steps
On a constant temperature control unit:
The defaulted hours run or the defaulted interval with clock symbol "u" (sub-
ject to setting)
On a weather-compensated control unit:
"Maintenance"
Note
Set coding address "24:1" and then coding address "24:0" if a service is carried
out before "Maintenance" is displayed; the set maintenance parameters for
hours run and intervals are then reset to 0.
Press the following keys:
1. c The maintenance scan is
active.
2. a/b Scan maintenance mes-
sages.
After a service has been carried out
1. Reset coding address "24:1" to
"24:0".
The red fault indicator extin-
guishes.
Note
If coding address "24" is not reset,
a new "Maintenance" display will
be shown on Monday at 07:00 h.
34
(cont.)
3. d The maintenance display
will be cleared (for a
weather-compensated
control unit: "Acknowledge:
Yes", reconfirm with d).
The red fault display con-
tinues to flash.
Note
An acknowledged maintenance mes-
sage can be re-displayed by pressing
d (approx. 3 s).
2. Reset the burner hours run, burner
starts and consumption if required
Press the following keys:
c Scanning is active (see
page 63).
a/b for the selected value.
e the selected value will be
set to "0".
a/b for further scans.
d Scanning is completed.