ADJUSTMENT STEP 3

Test the Safety Reversal System

TEST

•With the door fully open, place a one-inch 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 fimit adjustments do not cause the trolley to move within 2-1/2" of the trolley stop bolt. If necessary

lengthen straight door arm to maintain this minimum distance.

•Repeat the test.

•When the door reverses on the one-inch 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.

Without a properly installedsafetyreversalsystem, persons(particularlysmall children) could be

SERIOUSLYINJUREDor KILLEDby a closing garage door.

•Safetyreversalsystem MUSTbetested everymonth.

•If onecontrol (force or travellimits) is adjusted,the other control mayalso needadjustment.

•Nter ANYadjustmentsare made,the safetyreversal systemMUSTbetested. Door MUSTreverseon contactwith one-inchhigh object (or 2x4 laid flat) on the floor.

II

One-inch board (or a 2x4 laid flat)

ADJUSTMENT STEP 4

Test the Safety Reversing Sensor

•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,

and the opener light 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" above the floor), call for a trained door systems technician.

Without a properlyinstalledsafetyreversingsensor, persons(particularlysmallchildren) could be

SERIOUSLYINJUREDor KILLEDby a closinggarage door.

3O

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Sears 139.53960SRT Test the Safety Reversal System, Adjust, Important Safety Check, Test the Safety Reversing Sensor
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139.53960SRT, 139.53968SRT, 139.53971SRT specifications

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