LiftMaster LJ8950W LJ8950W Manual - Page 18

If The Amber Led On The Sending Sensor Is Not Glowing, Ensure The Safety Reversing Sensors Are Aligned

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Installation 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. 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. Amber LED If the receiving sensor is in direct sunlight, switch it with sending sensor so it is on the opposite side of the door. Green LED Sending Sensor (Invisible light beam) Receiving Sensor IF THE AMBER LED ON THE SENDING SENSOR IS NOT GLOWING: • Make sure there is power to the door operator. • Make sure the sensor wire is not shorted/broken. • Make sure the sensor has been wired correctly: white wires to white terminal and white/black wires to grey terminal. WHITE GREY IF THE GREEN LED ON THE RECEIVING SENSOR IS NOT GLOWING: • Make sure the sensor wire is not shorted/broken. • Make sure the sensors are aligned. 18

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18
Receiving Sensor
Green LED
Sending Sensor
Amber LED
Installation
IF THE AMBER LED ON THE SENDING SENSOR IS NOT GLOWING:
•
Make sure there is power to the door operator.
•
Make sure the sensor wire is not shorted/broken.
•
Make sure the sensor has been wired correctly: white wires to white terminal and
white/black wires to grey terminal.
If the receiving sensor is in direct
sunlight, switch it with sending
sensor so it is on the opposite side
of the door.
(Invisible light beam)
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. 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.
WHITE
GREY
IF THE GREEN LED ON THE RECEIVING SENSOR IS NOT GLOWING:
•
Make sure the sensor wire is not shorted/broken.
•
Make sure the sensors are aligned.