Control System; Hydraulic Unit - stertil-KONI ST1075-FBF Installation, Operation And Maintanance Instructions

The columns are coupled together by an identification procedure (with an ID key).
The control signals that ensure synchronised movement of the columns, are
transmitted through the air.
3.4

Control system

The control system on the columns ensures that raising and lowering of the column
lifts is simultaneous and synchronised, independent of the load distribution on the
columns.
Each column lift has a potentiometer that detects the height position and passes it
on to the control system. The control system controls and protects the lifting system
during raising and lowering in the following manner:
• When there is a elevation difference of more than 5/8" and less than 1 1/4", an
extra correction valve in the hydraulic system opens until the elevation difference
between the column lifts is eliminated.
• Lowering will be interrupted when the elevation difference is more than 1 1/4" and
less than 2 3/8". A lifting fork may be blocked. The cause of the fault must then be
traced. You can still lift and the correction valve in the hydraulic system will open
until the elevation difference has been synchronized.
• When the elevation difference exceeds 2 3/8", the control voltage will be cut off,
causing all movement to stop. The cause of the fault must then be traced.
Note
n
Height differences may be caused by oil leakage in cylinders or valves.
The control system is also designed so that:
• Any column lift can be controlled individually.
• Any pair of axles can be controlled individually (for an explanation, see chapter
5 Operation on page
Warning
w
Controlling individual column lifts and/or pairs of axles is exceptionally hazardous.
Refer to
The control is equipped with a number of programmable settings;
see 7.3 Programmable settings on page 51
3.5

Hydraulic unit

The hydraulic power unit comprises an electrically powered pump, flow control
valves, control valves and a fluid reservoir.
Operating instructions (Version 0)
33).
4.3 Safety when hoisting on page 29
.
.
24 ST 1075