Chamberlain 8065 Installation Manual page 28

Adjustments
2 Test the Safety Reversal System
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.
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After ANY adjustments are made, the safety reversal system MUST be tested.
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Door MUST reverse on contact with 1-1/2" (3.8 cm) high object (or 2x4 laid flat)
on the floor.
1. With the door fully open, place a 1-1/2 inch (3.8 cm) board (or a 2x4 laid flat) on
the floor, centered under the garage door.
2. Press the remote control push button to close the door. The door MUST reverse
when it makes contact with the board.
If the door stops and does not reverse on the obstruction, increase the down travel (refer
to Adjustment Step 1). Repeat the test. When the door reverses upon contact with the 1-
1/2 inch board, remove the board and open/close the door 3 or 4 times to test the
adjustment. If the garage door opener continues to fail the safety reversal test, call a
trained door systems technician.
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3 Test the Protector System
Without a properly installed safety reversing sensor, persons (particularly small
children) could be SERIOUSLY INJURED or KILLED by a closing garage door.
1. Open the door. Place the garage door opener carton in the path of the door.
2. Press the remote control push button to close the door. The door will not move
more than an inch (2.5 cm), and the garage door opener lights will flash 10 times.
The garage door opener will not close from a remote control if the LED in either safety
reversing sensor is off (alerting you to the fact that the sensor is misaligned or
obstructed). If the garage door opener closes the door when the safety reversing sensor
is obstructed (and the sensors are no more than 6 inches [15 cm] above the floor), call
for a trained door systems technician.
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