LiftMaster 8160W Owners Manual - Page 27

Power 2 Ensure the Safety Reversing Sensors are Aligned The door will not close if the sensors have not been installed and aligned correctly. When the light beam is obstructed or misaligned while the door is closing, the door will reverse and the garage door opener lights will flash ten times. If the door is already open, it will not close. The sensors can be aligned by loosening the wing nuts, aligning the sensors, and tightening the wing nuts. 1. Check to make sure the LEDs in both sensors are glowing steadily. The LEDs in both sensors will glow steadily if they are aligned and wired correctly. IF THE AMBER LED ON THE SENDING SENSOR IS NOT GLOWING: 1. Make sure there is power to the garage door opener. 2. Make sure the sensor wire is not shorted/broken. 3. Make sure the sensor has been wired correctly: White wires to white terminal and white/black wires to gray terminal. 1 2 3 RED WHITE WHITE GREY If the receiving sensor is in direct sunlight, switch it with sending sensor so it is on the opposite side of the door. IF THE GREEN LED ON THE RECEIVING SENSOR IS NOT GLOWING: 1. Make sure the sensor wire is not shorted/broken. 2. Make sure the senors are aligned. 1 2 (invisible light beam) Amber LED SENDING SENSOR Green LED RECEIVING SENSOR 27