Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 125

Checking the changeover unit
Manual operation of changeover unit
Positioning the changeover unit
A "set position for the changeover unit" can be
selected by pressing /
Changeover unit functions
The following functions can be manually specified for
each suction wand:
■ Position for "Suction"
Position for "Flush"
■
Activating the vacuum module
If the set position and the actual position of the
changeover unit are identical, the vacuum module can
be activated by pressing and holding
Loading the standard setting
This function is for loading the standard settings of
individual or multiple menus.
Note
This function does not reset the hardware codes.
Calling up the "Standard setting" menu
1. Simultaneously for approx. 4 seconds
d +
å
The "Service" menu appears.
(cont.)
.
.
d
Diagnosis and service scans
This set position is automatically approached by the
changeover unit. This changes the "actual position
of the changeover unit". When the selected position is
reached the display changes to
Note
The vacuum module only remains active while the key
is being pressed.
When the "Suction " function is active, observe the fill
level of the pellet hopper. The pellet hopper fill level is
not monitored in the "Service menu".
Only activate the "Flush" function when the suction
wand is empty.
Meaning of display texts in the "Standard setting"
menu:
Displays
■
– "All data"
The standard settings for all listed menu items are
loaded.
– "General"
General standard settings are loaded.
"Boiler"
–
Standard settings in the "Boiler" menu are loaded.
– "Charging"
Standard settings in the "Charging" menu are loa-
ded.
– "Buffer"
Standard settings in the "Buffer" menu are loaded.
"Additional boiler"
–
Standard settings of the "additional boiler" are loa-
ded.
– "All groups"
The standard settings of all control circuits (heating
circuits, DHW heating, solar circuit) are loaded.
2. / For "Service functions"
| ~
3. To confirm
d
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