Chamberlain ATS 2113X - Manual (Page 22)

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ADJUSTMENT STEP 3
Test the Safety Reversal System
TEST
With the door fully open, place a 1-1/2" (3.8 cm) board (or a •
2x4 laid flat) 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 19.
Repeat the test. •
When the door reverses on the 1-1/2" (3.8 cm) board, 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. •
ADJUSTMENT STEP 4
Test the Protector System ®
Press the remote control push button to open the door. •
Place the opener carton in the path of the door. •
Press the remote control push button to close the door. The •
door will not move more than an inch (2.5 cm), and the opener
lights will flash.
The garage door opener will not close from a remote if the
indicator light in either sensor is off (alerting you to the fact that
the sensor is misaligned or obstructed).
If the opener closes the door when the safety reversing sensor
is obstructed (and the sensors are no more than 6" [15 cm]
above the floor), call for a trained door systems technician.
Safety Reversing Sensor Safety Reversing Sensor
1-1/2" (3.8 cm) board
(or a 2x4 laid flat)
Without a properly installed safety reversing sensor, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
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 1-1/2"
(3.8 cm) high object (or 2x4 laid flat) on the floor.