ATT NUSSBAUM COMBI LIFT 4.40 S, Operating Manual, Inspection Book

Page: 139 / 184

OPI_COMBI LIFT 4.40 S PLUS AMS_V3.0_DE-EN 139
Problem: Motor starts, load is not lifted
Possible causes: Remedy:
The vehicle is too heavy Unload vehicle if possible
Hydraulic oil filling level
is too low
Refill new hydraulic oil
Emergency discharge
screw is not closed
Close emergency
discharge screw
Emergency discharge
screw is not closed
Check the valve
Pressure lines blocked Inform customer service
Leak in the hydraulic
system
Inform customer service
Problem: The lift cannot be lowered
Possible causes: Remedy:
Lifting table is sitting on
an obstacle
Raise the lift and remove
the obstacle.
Push the "Bridge" (16)
and “LIFT” buttons
o
(12)
Kundendienst benach-
richtigen
Hydraulic valve (flush)
defective
Inform customer service
The lift is located in the
safety ratchets
Raise lift
Cable broken, safety
switch is activated
Stop lift, inform customer
service
6.1 Moving onto an obstacle
If the system moves onto an obstacle during lowe-
ring, or remains stuck with the safety catches in the
catch bar, a cable loosens. A safety switch (5) lo-
cated below the drive-in rail is activated and the lift
switches off. In this case, move the lift upwards by
pushing the “Bridge” (16) and the “LIFT” buttons
o
(12) on the operating panel until the obstacle can
be removed or the cable is tensioned again.
Afterwards the lift is in a normal work condition and
can continue to be operated as described in the
operating manual.
6.2 Emergency Lowering
In case of power failure or defect of the electroma-
gnet, the control valve (22) can not be opened.
Therefore, the lift can not be lowered. In this case, it
is possible to open the control valve (22) manually
and bring the lift in the lowest position so that the
vehicle can be driven from the lift.
An emergency lowering is an enga-
gement into the system controls and
may only be done by experienced
specialists. The emergency lowering
must be done in the following descri-
bed sequence, otherwise it can lead
to damage and hazard to life and
limb.
! Any kind of external leakage is not permitted and
must immediately taken care of. This is absolutely ne-
cessary especially before an emergency lowering.
i
If there is a power failure an emergency lowe-
ring can only be done if the safety ratchets (24)
are not engaged. For this reason wait until the
power failure is over. If there is a defective valve,
a latched in lift can be slightly lifted by pushing
the “LIFT” button
o
(12) so the catches (24) can
be manually retracted.
6.2.1 In general
People may not stand in the hazardous area
around the lift.
The safety ratchets must be capable of being ma-
nually retracted in order to fasten them using a sui-
table object (e.g. wire) against latching in.
In order to execute the emergency lowering the
following tools are required:
• 1 x screw-on cap with Allen screw (18)
• 2 x screw-on cap with wing bolt (19)
• 1 x 3 Allen key (23)
• 4 x cable ties/wire (25)
19
18
18 screw-on cap with Allen screw 025
19 screw-on cap with wing bolt
6.2.2 With wheel free lift
In case the lift comes with a wheel free lift, it must
be lowered first because after lowering the rails it is
no longer possible to access the valves MV4 and
MV5 of the wheel free lifts (see hydraulic plan page
21).