probst JM-VARIO-200-B Operating Instructions Manual page 100

Adjustments
If the valve tappet often gets blocked on kerbs / slabs etc., it is also possible to work without the valve
tappet in exceptional cases (dismantle).
The prerequisite for this is airtight materials. However, this must be tested by the user in each
individual case.
•
In case of motor failure the load does not drop
(non-return valve)
•
Residual vacuum slowly lowers the operating
unit/lifting unit with the suctioned load.
•
Adjust the motor speed so that there is a
minimum vacuum of 0.42 bar (see pressure
gauge  on the control unit).
Do not tear loose loads that are stuck!
Do not interrupt work (breaks) with the load
sucked in, danger of overheating of the vacuum
blower!
52000029 / 52000029-150 / 52000029-200 20 / 37 GB