CENTURION SYSTEMS D2 Turbo Installation Manual page 92

Procedure B - False collision detection
Status light flashes four times to indicate that number of collisions have exceeded the
Collision Counter feature value.
With the operator in Manual Mode, check the following and correct if necessary:
• Check for badly running gate, or something physically obstructing the gate
• Activate the manual override and manually move the gate to check for ease of
operation
• Rack pressing down onto pinion
• Bad rack joints
• Seized or badly running wheels
• Top guide-rollers restricting the gate
• Dirt on rail
• Physical damage to the rail
• Wheel catching side of pinion
• Gate hitting endstop
• Check the DC motor wires for loose connections
• Check that the sensor wire harness is securely plugged into controller
• If the problem is not solved, replace the motor module and main controller
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