GFA LB 700, Installation Instructions Manual, Page: 25 / 28

25
7 Control-unit status display
The dock-leveller control unit can display up to three different statuses, one after the other.
The displayed status code consists of a letter and a number. Here a distinction is made
between a fault display (letter F) and an operation display
(letter P).
Display Fault description Measures for fault correction
Emergency stop activated Check whether the emergency-stop control device is
engaged or whether the connecting lines have a cable
break.
Ramp locked Open door until top limit position is reached.
No vehicle recognition with
vehicle detector Move vehicle closer to the dock leveller. Check the
alignment of the detection unit, if required.
Wheel-block sensor not
activated Check whether the wheel-block sensor is being
activated properly or the connecting lines have a cable
break. If monitoring with internal traffic lights, reset fault
status by pressing “Open” button
Input key switch operated Check whether key switch has been operated.
Fall below minimum
extension duration for lip Movement was stopped too soon; reset the fault status
with the next command (any command).
Maximum extension
duration for lip exceeded
Check the hydraulic and mechanical systems for
stiffness. Possibly correct the time setting in the
program.
Fall below minimum lifting
duration for platform Movement was stopped too soon; reset the fault status
with the next command (any command).
Maximum lifting duration
for platform exceeded Check the hydraulic and mechanical systems for
stiffness. Possibly correct the time setting in the
program.
Maximum lifting duration
for “Auto return” function
exceeded
Control button
control input faulty. Switch control off and on.
Replace control if necessary.