Craftsman 53479 Owner's Manual page 30

I Adjustment Step 3 I
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 tkan an inch, and the
opener liqkt will flashJbr 5 seconds.
Professional service is required if the opener closes the
door .,hen the safety reversing sensor is obstrncted.
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).
The garage door can be closed by pressing and holding
the Wall Control push bar or button until down travel is
completed.
Without a properly working safety reversing sensor,
persons(particularly children)couldbe seriouslyinjured
or killed if trappedby a closinggarage door.Repeatthis
test oncea month.
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Safety Reversing Sensor
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Safety Reversing Sensor
I Adjustment Step 4
I
Test the Safety Reverse System
Test
• 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. Tke door mnst
reverse on striking tke obstruction.
Adjustment
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
adjustlnent 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 illustration on page 26.
• When the door reverses on the one-inch board, relnove
the obstruction and mn the opener through 3 or 4
COlnplete travel cycles to test adjustlnent.
If the door will not reverse after repeated adjustment
attempts, call for professional garage door service.
Important Safety Check
Repeat Adjustment Steps 1 - 4 after:
• Each adjustlnent of door arm length, force controls or
limit controls.
• Any repair to or adjustlnent of the garage door
(including springs and hardware).
• Any repair to or buclding of the garage floor.
• Any repair to or adjustlnent of the opener.
Failureto test and adjust the safetyreversesystem may
resultin serious injuryor death to personstrapped by a
c/osinggaragedoor. Repeatthis test once a monthand
adjustas needed,
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_4 laid flat)
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