ELECTRICAL ERRORS
CAUSE
CORRECTION
MECHANICAL ERRORS
CAUSE
CORRECTION
Barrier arm keeps going up and down
Limit switch fault
check and reset limit switches
Barrier creaking when moving
Check bearings
Oil or grease bearings
Barrier motor not running
Loss of voltage
Check motor supply test 3 phases
Barrier not raising or lowering
Possible stripped gears
Call service team to diagnose fault
Barrier not raising or raising half way
Gearbox
Gears stripped due to overlading replace
Barrier raises slowly and lowers too fast
Lack of balance counter weight compensation
Fit counter weights
Barrier not running at all
Door has been left open or switch not pushed in
Close the door and issues a signal to open or
close
Barrier raised will not lower
Key switch is left in open position
Turn key switch to auto
Loop fault or loop detecting
Check if green light is on detector if so remove
object that it is detecting or replace loop
Blank screen on PLC but power to other devices
in the control panel
On-board fuse blown
Replace fuse and reset barrier
PLC has developed an electrical fault or had a
power spike
Change PLC
Barrier does not run (stays open)
Check inverter is in ready (rdy) mode on display
Power down then back up
Loop detector is faulting or sensing presence
Clear obstacle or reset the detector
Check inverter settings
ACC - 6.0 DEC – 2.0 LSP – 25-40 (Variable)
Barrier staying up in raise position
Access control giving a constant pulse shorten
this
Photo cell batteries (if fitted)
Check that the fitted batteries still have power to
them. They should only be replaced with special
3.6V Lithium-ion batteries made for purpose. These
can be provided by your supplier
Photo cells dirty (if fitted)
Clean photo cells make sure they are debris free
Mains on but no power
Isolator fuse
Check and meter fuse in isolator
Barrier not going up
Access control may be faulty
Remove and check barrier function via the PLC
Barrier Staying up
Car has driven off before clearing the loop
Complete cycle by going through the ground loop
D
3250
Troubleshooting guide. (Cont.)