Craftsman 139.53674SRT - Manual (Page 30)

Adjustment Step 3
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.
Professional sendee Is required if the opener
closes the door when the safety reversing
sensor is obstructed.
The garage door opener will not close from a
remote control if the Indicator iight In either
sensor is off (alerting you to the fact that the
sensor is misaligned or obstructed).
The garage door cein be closed by pressing and
holding the Door Control push button until down
travel is completed.
Without a properly working safety reversing
sensor, persons (particularly children) could be
seriously injured or killed if trapped by a
closing garage door.
Repeat this test once a
month.
Safety Reversing Sensor Safety Reversing Sensor
Adjustment Step 4
Test the Safety Reverse System
s'У'/
Test:
• Place a one-inch board (or a 2x4 laid flat) on the
floor, centered under the geirage door.
• Operate the door in the down direction. The door
must reverse on striking the obstruction.
Adjustment:
If the door stops on the obstruction, it is not traveling
far enough in the down direction.
■ IfKrease the DOWN limit by turning the DOWN
limit adjustment screw counterclockwise 1/4 turn.
• Repeat the test.
On a sectional door, make sure limit adjustments
do not force the door arm beyond a straight up
and down position. See the lllustratim on page 26.
• 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.
If the door will not reverse after repeated
adjustment attempts, call Sears Service Center
for garage door opener service.
Failure to test and adjust the safety reverse
system may result in serious Injury or death to
persons trapped by a closing garage door.
Repeat this test once a month and adjust as
needed.
GARAGE DOOR
lOne-inch board (or a 2x4 laid flat)
important safety check
Repeat Adjustment Steps 1,2 and 4 after:
• Each adjustment of door arm length, force controls
or limit 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.
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