Viessmann VITOCROSSAL 200 CM2 Service Instructions For Contractors page 37

Burner control unit
5. / for required maximum operational output.
Note
Observe the modulation range. See page 66.
Resetting operating parameters to their delivered condition
To reset operating parameters to their delivered condi-
tion:
1. S longer than 2 s, " " flashes.
2. until "6" is shown under Service.
3. S "6" is displayed under Status.
Manual mode and service indicator
To call up the service indicator and for manual opera-
tion the burner must be running. The service indicator
shows the current modulation level in %.
Press the following buttons:
1. /S simultaneously for longer than 2 s.
The burner switches to manual mode. "P"
appears on the display under Status and the
current modulation level flashes under Serv-
ice.
(cont.)
6. S to confirm. If adopted successfully, "1" appears
under Service; if it failed, "0" will appear.
7. S to change to the operating display.
4. until "0" is shown under Service.
5. S "1" is shown under Status and "dEL" under Serv-
ice.
6. S to confirm. If reset successfully, "1" is shown
under Service; if it failed, "0" is shown.
7. S to change to the operating display.
2. for the lower heating output, until "0" is shown
under Service.
3. for the upper heating output, until "100" is
shown under Service.
4. /S simultaneously for longer than 2 s.
The burner returns to modulating mode.
Burner control unit
37