LiftMaster 8500W 8500W Users Guide - English French - Page 15

Adjustments 2 3 Test the Safety Reversal System Test the Protector 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" high (3.8 cm) object (or 2x4 laid flat) on the floor. Without a properly installed safety reversing sensor, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. 3.1 Open the door. Place an obstruction in the path of the door. 2.1 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. 3.2 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. 2.2 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. Review the installation instructions provided to insure all steps were followed; 2. Repeat Program the Travel (see Adjustment Step 1); 3. Repeat the Safety Reversal test. If the test continues to fail, call a trained door systems technician. 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. 15