Troubleshooting Lift Master Photo Eyes

Tips for fixing a Lift Master photo eye

Gate does not reverse when there is a Obstruction

1. Using incorrect reflector. USE THE PROVIDED REFLECTOR ONLY.
2. If the reflector is mounted horizontally it will need be mounted vertically.
   

Gate does not move

1. Minimum of 2 entrapment devices not installed. Check sensor connections. Slide gate operators require a minimum or two devices one in the close and one in the open direction.
2. Sensor is obstructed. Check for obstructions.

Red And Blue LED Lights Alternate Blinking

1. Internal fault Disconnect all power, wait 15 seconds, then reconnect power.
   If issue continues, replace sensor.

Red/Blue LEDs blinking together

1. Internal memory fault Disconnect all power, wait 15 seconds, then reconnect power.
   If issue continues, replace sensor.

Solid Red LED And Gate Wont Close

1. The sensor may not properly aligned. You will need to align the sensor until the blue light is on solid.
2. Sensor could be too far from reflector. If possible decrease the distance between the sensor and reflector.
3. Reflector or sensor lens is dirty. Clean the sensor and reflector with a soft damp towel
4. Object is obstructing beam. Remove any objects obstructing beam
5. Rain or condensation on reflector or the photo sensor lens. Gently wipe and clean the sensor and reflector with a soft towel. If equipped make sure sensor heater is connected.

Blinking Blue LED

1. Sensor is not optimally aligned. Align the sensor until the blue light is solid
2. Sensor is too far from reflector. Decrease the distance between the sensor and reflector
3. Reflector or sensor lens is dirty. Gently clean the sensor and reflector with a soft damp towel