Chamberlain B4505TC Manuel D'installation page 33

Adjustment
3
- 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.
• After ANY adjustments are made, the safety reversal system
MUST be tested. 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 but does not reverse:
1. Repeat Program the Travel (see Adjustment Step 1);
2. Repeat the Safety Reversal test.
If the test continues to fail, call a trained door systems technician.
4
- 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 an obstruction 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).
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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