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.)
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