Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 174

Function description
Display and control elements
Display
A Buffer drawing
Boiler
Buffer
Heating
DHW
B Select with
Fig. 104
Display of operating phase
A
Dialogue line
B
Back key
Return to the previous step in the menu or cancel
a setting that has been started.
Function of "START/STOP" button
START/STOP button:
Not illuminated
Illuminated
Flashing
Flashing slowly
■
Flashing rapidly
■
174
(
The boiler is off; no frost protection.
The boiler is in standby mode and will start automatically on demand or
the boiler is in operation.
The boiler completely burns the available fuel
or
An external demand via coding address 44 was activated
Note
The START/STOP button is disabled if an external programming unit is con-
nected. The boiler can only be switched on and off via the external unit.
Contact at plug
sMÖ
There is no current demand.
Contact at plug
sMÖ
There is an external demand.
Cursor keys
Scroll through the menu or adjust values.
Confirm selection or save the setting made.
d
Calling up help text for the selected menu item
Call up the extended menu
open
closed