Obstruction Test - LiftMaster Elite Serie Manuel D'installation

Fine Tune the Force
Once the initial limits have been set, the REVERSAL FORCE DIAL on the
control board is used for fine tuning the force where wind or
environmental changes may affect the gate/door travel. The REVERSAL
FORCE DIAL is set to minimum at the factory.
Based on the length and weight of the gate/door it may be necessary to
make additional force adjustments. The force setting should be high
enough that the gate will not reverse by itself nor cause nuisance
interruptions, but low enough to prevent serious injury to a person. The
force setting is the same for both the open and close gate/door
directions.
1. Open and close the gate/door with the TEST BUTTONS.
2. If the gate/door stops or reverses before reaching the fully open or
closed position, increase the force by turning the force control
slightly clockwise.
3. Perform the "Obstruction Test" after every limit and force setting
adjustment (see below).
Adjust the Limits
After both limits are set and the operator is ready to run, one limit can be
adjusted independently from the other by following steps 1-3 of the
Initial Limit and Force Adjustment section.

Obstruction Test

The operator is equipped with an inherent (built in to the operator)
obstruction sensing device. If the gate/door encounters an obstruction
during motion, the operator will reverse direction of the gate/door and
then stop The following procedure will test ONLY the inherent (built in to
the operator) obstruction sensing device:
1. Open and close the gate/door with the TEST BUTTONS, ensuring
that the gate/door is stopping at the proper open and close limit
positions.
2. Place an object under the open gate/door. Make sure that any
external entrapment protection devices will NOT be activated by the
object.
3. Run the gate/door in the close direction. The gate/door should stop
and reverse upon contact with the object. If the gate/door does not
reverse off the object, reduce the force setting by turning the force
control slightly counter-clockwise. The gate/door should have
enough force to reach both the open and close limits, but MUST
reverse after contact with an object.
4. Repeat the test for the open direction.
Test the operator after any adjustments are made.
ADJUSTMENT
1
2
3
18