5.
Problems
, causes, actions
20
Rev. D 2013_03_en
Problem
Possible cause
Actions
Locking latches not latching or
cannot be released
.
Compressed air supply inter-
rupted.
Faulty control valve for air
supply.
Locking mechanism is
jammed.
Air cylinder for locking mech-
anism is dirty.
Check locking mechanism, repair
if necessary.
Lowering process stops abruptly.
A buzzer sounds, the control unit
is out of order.
Cable is too slack.
Cable broken.
Depending on cause:
●
turn main switch to "
OFF“
and lock it.
●
Check all cables.
Replace faulty or warped cables
(
Chapter 9.6).