Frantz 135F-1/4HP Owner's Manual - page 30
Adjustment Step 3
Test The Safety Reversing Sensor
WARNING
Without a properly working safety
reversing sensor, persons (particularly
children) could be seriously injured or
killed by a closing garage door. Repeat
this test once a month.
•
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).
The garage door can be closed by pressing and
holding the Door Control push bar or button until
down travel is completed.
Professional service is required if the opener
closes the door when safety reversing sensor is
obstructed.
30
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. 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.
•
Increase 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 illustration 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 for professional garage
door service.
Adjustment Step 4
Test The Safety Reverse System
WARNING
Failure to test and adjust the safety
reverse system may result in serious
injury or death from a closing garage
door. Repeat this test once a month
and adjust as needed.
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.