Max Collisions (D-Series)

Possible causes:

• The operator is encountering an obstruction and has reached the pre-set number of allowable collisions

• Gate rack resting on pinion

• Seized gate wheels

• The controller collision force is set too sensitively

• Number of allowable collisions set to a low value, e.g. 1

• Damaged encoder wheel

• Tight gearbox

• Oil on DOSS

• Faulty DOSS harness

• Loose drive connections

• Gearbox not fully engaged

• Faulty DOSS sensor

• Faulty electric motor

Solutions:

• Ensure that the gate is running smoothly and that there is nothing physically obstructing the gate, e.g. dirt or stones on the rail, rack pressing down on pinion, bad rack joints, etc.

• There should be a 2 - 3mm gap between the rack and the pinion

• Increase the Collision Force (Menu 2: Safety)

• Increase maximum collisions value to a higher number, typically 4

• Check for evidence of oil on the encoder by following the procedure below: (D5-Evo/D5-Evo Low-Voltage only)

• Remove the DOSS and carrier so that the encoder wheel is clearly visible

- Disengage the gearbox

- Place your finger on the wheel

- Move the gate a metre or so in both directions

- Check your finger for oil

• Replace faulty DOSS harness

• Check battery and motor terminal connections

• Ensure that operator is fully engaged

• Replace faulty DOSS sensor

• Replace faulty electric motor

• Have the operator serviced by an authorised workshop

To reach the DOSS chip on a D5 EVO, you'll have to remove the cover of the motor. You'll find the DOSS positioned above the thumbwheel, directly in front of the red electronic motor.  For easy Identification, there is a warning sticker on the DOSS cylinder indicating "No oil allowed".   

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