Obstruction Test - Chamberlain LiftMaster Elite CSL24VH Installation Manual

ADJUSTMENT
FINE TUNE THE FORCE
The FORCE DIAL on the control board is used for fine tuning the force in cases where
wind or environmental changes may affect the gate travel.
Based on the length and weight of the gate 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
directions.
1
Open and close the gate with the TEST BUTTONS.
2
If the gate 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 force setting adjustment (see below).
ADJUST THE LIMITS
If the limits have already been set the operator will exit the limit setting mode after
resetting each limit. Each limit is set separately by following steps 1-3 of the Initial
Limit and Force Adjustment section on page 21.
ERASE LIMITS
1
To erase the limits, press and hold the SET OPEN and SET CLOSE buttons
simultaneously (5 seconds) until both the SET OPEN and SET CLOSE LEDs blink
rapidly and the operator beeps.
2
Release the buttons and the SET OPEN and SET CLOSE LEDs will blink slowly
indicating the limits will need to be set.

OBSTRUCTION TEST

The operator is equipped with an automatic obstruction sensing feature. If the gate
encounters an obstruction during motion, the operator will automatically reverse
direction of the gate for a short time and then stop the gate. After any adjustments
are made, test the operator:
1
Open and close the gate with the TEST BUTTONS, ensuring that the gate is
stopping at the proper open and close limit positions.
2
Place a solid object between the open gate and a rigid structure. Ensure that the
gate, the solid object, and the rigid structure can withstand the forces generated
during this obstruction test.
3
Run the gate in the close direction. The gate should stop and reverse upon
contact with the solid object. If the gate does not reverse off the solid object,
reduce the force setting by turning the force control slightly counter-clockwise.
The gate should have enough force to reach both the open and close limits, but
MUST reverse after contact with a solid object.
4
Repeat the test for the open direction.
LIMIT AND FORCE ADJUSTMENT + OBSTRUCTION TEST
1
22
1
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2
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3
2