23
Problem
Possible cause
Actions
The motor is not running.
• Mains fuse is faulty.
Reset or change the mains fuse.
The runways lower unevenly
during the lowering process
→
Lift or lifting table runways tilted.
Main lift
• Slack cable switch or broken
cable switch activated.
• Can lift when cable is slack. If
cable is broken the whole lift
is locked.
• Lowering locked.
Lifting table
• Photosensor disconnected.
• Height difference > 50 mm.
• Whole lift is locked.
• An object is blocking the dow-
nward motion. The lowering
process is aborted.
• Load unevenly distributed.
• Settling function still active:
main lift and lifting table partly
still in the lock position (Lock
bar/ratchets).
• Slack or broken cable on one
of the lift columns.
Main lift
1. Move lift up slightly. Make sure
that all cables are tensioned.
2. Remove objects from under the
lift.
3. Carry out adjustments. To do so,
lower the lift completely.
4. Check that lift is being cor-rectly
operated.
5. If this cannot be done:
(
→
Chapter 6. Authorized low-
ering) or (
→
Chapter 9.
Maintenance/repair).
Lifting table
1. Consult a competent person (
→
Chapter 6. Authorized lowering)
Control unit does not work. A
buzzer
sounds.
• Runways misaligned. Mis-
alignment
protection activated.
Consult maintenance contractors
(
→
Chapter 6. Authorized
lowering).
Lowering process stops
abruptly.
A buzzer sounds, control unit is
out of order.
• Cable too slack.
• Cable broken.
1. Switch main switch to "OFF“
and lock it.
2. Consult maintenance contrac-
tors. Change the cable.
The main lift does not react
when being lowered.
A buzzer sounds.
• Cable too slack or damaged.
Slack
cable switch activated.
1. Switch main switch to "OFF“
and lock it.
2. Consult maintenance
contractors. Tighten and adjust
cable (
→
Chapters 11.11 and
13.4). Restart.
The process stops after a few
centimeters when lowering into
the lock position.
• Pneumatic solenoid valve not
supplied with compressed air.
Check compressor connection.