STL3500
20
IX) TROUBLESHOOTING
WARNING
It is important to follow all precautions in the chapter on “safety” when identifying and searching for faults and carrying
out subsequent repairs.
Problem
Cause
Solution
The lift does not rise when the lifting
button is pressed.
The fuse is burnt out
Replace the fuse
The lift is heavily overloaded
Reduce the load to the maximum
weight according to the specifications.
The switch is not working
Replace the switch and call dealer
Fault in the electrical system
Call dealer for service
Too little hydraulic oil
Add hydraulic oil
The suction pump is dirty
Clean the suction pump
The lift does not lift the whole way
The lift is overloaded
Maintain max. weight according to
specifications
Voltage too low
Check voltage
Too little hydraulic oil
Add hydraulic oil
Platform keeps sliding back
Leakage in hydraulic system
Call dealer for service
The hydraulic cylinder is dirty
Call dealer for service
Non return valve is leaking
Call dealer for service
Lift does not respond while pushing the
descent button
Locking device is stuck
Check air pressure
An obstacle prevents the mobile leg of
the lift from moving
Remove any object preventing the
moving of the bearings.
Thoroughly clean the surface on which
the mobile leg of the lift moves by the
means of the bearings.
Manual Lowering:
In case of power failure, faults or electrical system failure, it is possible to lower the lit manually.
WARNING
Manual (emergency) lowering must be carried out exclusively by authorised and trained personnel
For the manual lowering operate as follows:
Lift the hook of mechanical safety and position a wedge of about 3cm under them. Open the front panel of the control
unit, unscrew the cap of the lowering electro valve and push the spring piston in the inside. At this point the lift will lower.
Once this operation is finished and electrical current is restored, screw the cap of the electro valve back on and remove
the wedge under the mechanical safety device.
WARNING
Check the danger area during the operation. In case of danger, to stop the descent, release the pressure on the spring
piston of the electro valve.
