Viessmann GC1 - Calling up Coding Level 2

Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service
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Calling up Coding Level 2
1. Press OK and simultaneously for approx. 4 sec.
flashes on the display.
2. Press OK and simultaneously for approx. 4 sec.
3. With , select 2 for coding level 2 and confirm with
OK. I flashes on the display for the coding addresses
of group 1.
4. Select the group for the required coding address with
:
1:“General”
2: “Boiler”
6: “All codes std device”. In this group, all coding
addresses of coding level 2 are displayed in
ascending order.
Confirm selected group with OK.
5. Select the coding address with .
6. Select value according to the following tables with
and confirm with OK.
7. If you want to reset all codes to their factory set
condition: Select 7 with and confirm with OK.
When D flashes, confirm with OK.
Note: This also resets codes on coding level 1.
8. Exit coding level 2:
Press .
9. Exit the service level:
Select 9 with “Serv”.
Confirm with OK.
“OFF” flashes.
Confirm with OK.
Note: The system exits the service level automatically
after 30 min.
Coding 2, Vitotronic 100
Note: H In coding level 2, all codes are accessible,
including the codes from coding level 1.
H Codes that have no function due to the heating
system equipment level or the setting of other
codes are not displayed.