The Electronic Reversing Device (ERD) is a feature on the circuit board which detects when the gate
comes in contact with an obstruction, causing the gate to reverse. These are the 2 blue knobs on the
circuit board.
The open and close knobs determine the amount of force required to reverse the gate (figure A). We
generally recommend leaving the knob at 50. You may adjust the positions based on
your particular gate.
If the gate reverses without touching an obstruction, the ERD is set too low. If the gate does not
reverse when it hits an obstruction, the ERD is set too high.
Test ERD every 6 months.
Normal
= 50 is the default ERD force and is suitable for most
gates
Turn Left/Counter-Clockwise
= Less force to stop the gate.
Turn Right/Clockwise
= More Force required to stop the gate.
WARNING
•
Never increase force beyond the minimum amount required to move the gate. Too much force may
seriously injure or kill people.
•
Never use force adjustments to compensate for a improperly installed, improperly maintained, or a
damaged gate. The gate must normally move freely with no obstructions.
•
The ERD must be tested after making any changes. The gate must reverse when it comes in contact
with an object.
Obstruction Test
1. Place a light object (ex. chair or trash can) between the open gate and the post.
2. Close the gate. The gate should stop and reverse when it touches the object. If the
gate does not reverse when it touches the object, press the STOP button on the circuit
board. Reduce the ERD force by turning the CLOSE ERD knob counter-clockwise.
3. Do the same test again for the open direction.
4. Test the gate operator after any adjustments are made.
Step 8: Force Adjustment
18
FIGURE A
Summary of Contents for CM3
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