Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 102

Diagnosis and service checks
Checking the changeover unit
This function is for testing or manually switching the
changeover unit.
Note
This function is only available for discharge systems
with changeover unit type 0.
Calling up the "Changeover unit" menu
1. d + simultaneously for approx. 4 seconds.
å
The "Service" menu appears.
2. / for "Service functions".
| ~
3. to confirm.
d
4. / for "Changeover unit".
| ~
5. to confirm.
d
Icons and text in the menu
"2 8" Number and ID of suction wands present in
―
the pellet store.
The number of wands can be set in the code.
See chapter "Codes", "Charging" group.
Suction wand has already been started up
in this cycle.
The runtime of the suction wand has been
reached.
Suction wand has not yet been started up in
this cycle.
Suction wand blocked
Maximum runtime of the suction wand has
been exceeded.
Flushing of suction wand active
The symbol is displayed if the "Flush" function
has been pre-selected in the "Extended menu"
of the control unit.
Actual position
Current position of the changeover unit.
Set position
Required position of the changeover unit.
Manual operation of changeover unit
Positioning the changeover unit
The "set position for the changeover unit" can be
selected by pressing /
tion is automatically approached by the changeover
unit. This changes the actual position
changeover unit. When the selected position is
reached the display changes to .
102
. The selected set posi-
of the
!
Please note
Incorrect operation of the changeover unit can
cause a blockage in the vacuum system.
When the "Suction" function is active, observe
the fill level of the pellet hopper.
Only activate the "Flush" function when the suc-
tion wand is empty.
6. / to position the changeover unit.
7. to activate the vacuum module.
d
Note
The vacuum module only remains active
while the key is being pressed.
Only possible if the changeover unit has
reached the position.
8. until the default display is shown.
ä
Position for suction by the marked suction
wand.
Position for flushing of the "left-hand" suction
wand.
"LS" "LS zero"
Limit switch at zero point of changeover unit.
before "LS zero" indicates that the limit
switch is actuated at the zero point of the
changeover unit .
"LS" "LS position"
Limit switch for the position of the changeover
unit per vacuum unit.
before "LS position" indicates that the limit
switch is actuated at position
"PS" "PS pellet hose"
Proximity sensor in pellet hose for fuel detec-
tion during the suction process.
before "PS pellet hose" indicates that the
proximity sensor is not detecting any pellets in
the pellet hose.
or .