Operating instructions
– LBA4/6/7 – 2017 Version
59
17.3 Frequent adjustments and failures
Here is a table of frequent adjustments and failures:
Failure
Possible cause(s)
Troubleshooting
The barrier does not open
The opening control does not
reach the PLC
Look at the status of the PLC
inputs/outputs (see Ҥ 9.6
Setting the PLC”)
Check the wiring of the opening
control (or the free opening
loop)
The variable speed drive is
faulty
An error message is
displayed on the variable
speed drive
See Ҥ12.4 Variable speed
drive error messages”
The reduction gear is broken
Opening the barrier is
impossible, even when
switched off
Contact the After-Sales Service
to replace the geared motor
unit (see Ҥ 13.2 Replacement
of the geared motor unit”)
The crank is not put back in
place (LBA 4/6/7)
Put the crank back in its place
on the side of the board
The barrier does not close
The closing control does not
reach the PLC
Look at the status of the PLC
inputs/outputs (see Ҥ 9.6
Setting the PLC”)
Check the wiring of the closing
control
An opening control is active
Look at the status of the PLC
inputs/output
s (see Ҥ 9.7
Setting the PLC”)
Deactivate the opening control
A safety input is activated
(safety loop, IR sensor,
ultrasonic sensor)
Look at the status of the PLC
inputs/outputs (see Ҥ 9.6
Setting the PLC”)
Remove the vehicle or any
object on/in front of the safety
device.
Check the orientation of the IR
sensors
If there is no IR sensor or
ultrasonic sensor (options),
check that there is a shunt