Test The Safety Reversal System; Test The Protector System - Craftsman 139.18489DS Owner's Manual

ADJUSTMENT STEP 3

Test the Safety Reversal System

TEST
1. 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.
2. 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 25.
• 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.
• If the unit continues to fail the Safety Reverse Test, call for a
trained door systems technician.
IMPORTANT SAFETY CHECK:
Test the safety reversal system 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

1. Press the remote control push button to open the door.
2. Place the opener carton in the path of the door.
3. 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.
®
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" high (3.8 cm) object (or 2x4 laid flat) on the floor.
Without a properly installed safety reversing sensor, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
Safety Reversing Sensor
29
1-1/2" (3.8 cm) board
(or a 2x4 laid flat)
Safety Reversing Sensor