Test The Safety Reversal System - Chamberlain 3000E Owner's Manual

ADJUSTMENT STEP 3

Test the Safety Reversal System

Garage Door Installation
TEST
• With the door fully open, place a 38 mm obstacle on the
floor, centered under the garage door.
• Operate the door in the down direction. The door must
reverse on striking the obstruction.
ADJUST
• If the door stops on the obstruction, it is not traveling far
enough in the down direction. Increase the DOWN limit
by turning the DOWN limit adjustment screw
counterclockwise 1/4 turn.
NOTE: On a sectional door, make sure limit adjustments
do not force the door arm beyond a straight up and down
position. See the illustration on page 27.
• Repeat the test.
• When the door reverses on the 38 mm obstacle, remove
the obstruction and run the opener through 3 or 4
complete travel cycles to test adjustment.
IMPORTANT SAFETY CHECK:
Repeat Adjustment Steps 1, 2 and 3 after:
• Each adjustment of door arm length, limits, or force
controls.
• Any repair to or adjustment of the garage door
(including springs and hardware).
• Any repair to or buckling of the garage floor.
• Any repair to or adjustment of the opener.
Gate Installation
TEST
The opener must reverse if the gate comes in contact
with an obstruction. A closing gate should reverse
with little effort, and open completely. See Adjustment
Step 2.
• Use 38 mm board laid flat against the wall or gate edge.
• SLIDING GATE DOOR, place a 38 mm board between
the door and wall of a closing gate. Gate must reverse
on the board and open completely. Repeat at opposite
wall if two openers are installed.
• SWING OUT GATE, insert a 38 mm board between the
closing gate sections. Gate sections must reverse and
swing open completely.
ADJUST
• If the gate stops on the obstruction, it is not traveling far
enough in the closing direction. Increase the DOWN
limit adjustment screw counterclockwise 1/4 turn.
Repeat test.
• When the gate reverses on a 38 mm board, remove the
obstruction and run the opener through complete travel
cycle to test adjustment.
If the gate will not reverse after repeated adjustment
attempts, call for professional gate service.
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing door or gate.
• Safety reversal system MUST be tested every month.
• If one control (force or travel limits) is adjusted, the other
control may also need adjustment.
• After ANY adjustments are made, the safety reversal system
MUST be tested. Door MUST reverse on contact with 38 mm
obstacle on the fl oor. Gate MUST reverse on contact with
38 mm obstacle at the closing edge.
SECTIONAL DOOR
38 mm Obstacle
SLIDING GATE
38 mm
Obstacle
SWINGING GATE
38 mm Obstacle
31
ONE-PIECE DOOR
38 mm Obstacle