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Problem
Gate repeatedly overrides
its end-of-travel limits
Unreliable Autoclose
Gate opens to
pedestrian and closes
Besides a faulty controller, which will be considered last, the
only components that could cause this symptom are a missing
origin, or and most unlikely, a faulty DOSS sensor
However, initially before the gate overrides its limits, if the
origin is not detected, the controller will automatically start
beeping when the gate is running, but it will allow normal
operation
Check for the following:
Check that the origin marker is correctly positioned as
shown on pages 26 to 27
Check if the gate origin has accidentally moved. If so, reset
the limits as directed on page 35
Check that the DOSS sensor harness is properly plugged
into the magnetic origin switch, the DOSS sensor and the
controller
Carefully check the condition of the harness - look out for
any bad crimp joints between the wires and the connectors
on the harness
Check that the magnetic origin switch is mechanically
switching. While in manual mode, slide the gate backwards
and forwards so that the magnet passes the switch each
time. Listen out for a distinctive click as the switch
operates. Also confirm the direction of the magnet using the
relevant diagnostic screen (e.g. magnet on the left or
magnet on the right)
Check that the magnetic origin switch is securely clipped
into the housing
Unclip and lift out the DOSS sensor and check that there is
no evidence of oil on the sensor eyes or ant/dirt ingress
If the problem is not solved, the main controller might be
faulty
Latching receiver on Trg would activate the Autoclose override
feature
Long pulse on Trg would activate the Autoclose override
feature.
Faulty IRBC Beam signal
Intermittent power loss, check for low voltages with procedure
A: Low battery voltage condition
If the problem is still not solved, the main controller might be
faulty
Intermittent fault on Ped (Pedestrian) input. Check wiring, and
keyswitch/keypad operation
Check Procedure B: False collision detection
If the problem is still not solved, the main controller might be
faulty
page 60
Possible faults
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