Viessmann Vitoligno 250-S Installation And Service Instructions For Contractors page 35

Calling up coding level 1
Codes are displayed as plain text.
■
■ Codes that have no function due to the heating sys-
tem equipment level or the setting of other codes are
not displayed.
Press the following keys:
1. + Simultaneously for approx. 4 s.
The "Service" menu appears.
2. / For "Code 1".
| ~
3. To confirm.
d
Calling up coding level 2
■ At coding level 2, all codes are accessible, including
the codes at coding level 1.
■ Codes that have no function due to the heating sys-
tem equipment level or the setting of other codes are
not displayed.
Press the following keys:
1. + Simultaneously for approx. 4 s.
The "Service" menu appears.
2. + Simultaneously for approx. 4 s.
ä
"Code 2" appears in the "Service" menu.
4. / For the required group.
| ~
5. To confirm.
d
6. / For the required coding address.
| ~
7. To confirm.
d
8. / For the required value.
| ~
9. To confirm.
d
"Adopted" appears briefly in the display.
10. Exit the service menu.
ä
3. / For "Code 2".
| ~
4. To confirm.
d
5. / For the required coding address.
| ~
6. To confirm.
d
7. / For the required value.
| ~
8. To confirm.
d
"Adopted" appears briefly in the display.
9. Exit the service menu.
ä
Coding levels
35