Opera ting Ma nua l a nd Inspection Book
SMART LIFT 2.30 SL, 2.35 SL, 2.40 SL / HYMAX S 3000, 3500, 4000
20110015 OPI
38
Version 1.0
6.3 Triggering the safety mechanism
The lift is provided with a safety mechanism that activates when the lift nut breaks. After a
break of the lift nut, the safety nut moving with the spindle takes up the slack on the spindle
and assumes the load. After a lift nut break the lift can be lowered once. After reaching the
lowest position, the lift can no longer be lifted, this means the lift is mechanically interlocked on
the defective side by a safety latch. If an attempt is made to raise the lift, the lifting rails move
out of the control range and the lift switches off. The lift is then to be secured against
unauthorised use (e.g. switch off and lock the main switch) until the lift has been properly
repaired. (this also includes the exchange of the lift and safety nuts)
As the triggering of the safety mechanism is a result of a lift defect, customer services
must be informed.
The main switch must be switched off, or the lift power disconnected and secured
against switch on for all errors and repairs.
The electrical controls may only be opened by a trained electrician
.
6.4 Manual equalization of the lifting rails
To ensure synchronous running of both lifting rails, both are connected to a position
measuring system. If one lifting rail moves forwards approx. 18 mm, this is detected by the
electronic controls. Following that, the more advanced lifting rail is stopped until both lifting
rails are at the same height again, only then is the motor restarted.
However if the lift moves out of a switch off or control window more than 64 mm, this is
detected by the electronic controls and the lift switches off.
To enter the normal control range of 18 mm again, the lift must be manually equalised.
Remove the upper column of a cover, turn the nut on the upper end of the spindle until
both sides are at the same height again.
6.5 Readjustment of the "Up and Down Off"
The potentiometers are to be set and checked in the factory for proper function. For safety
reasons, settings on the potentiometers can only be done by factory trained specialists
(competent personnel).
A check of the settings must be done during assembly.
•
If maintenance of repair work is done on the operating element, it must be disconnected
from power first. (e.g. pull out the power plug)
