The Protector System (Safety Reversing Sensors) - Chamberlain 8500W User Manual

Operation
The Protector System® (Safety Reversing Sensors)
Be sure power is NOT connected to the garage door
opener BEFORE installing the safety reversing sensor.
To prevent SERIOUS INJURY or DEATH from closing
garage door:
• Correctly connect and align the safety reversing
sensor. This required safety device MUST NOT be
disabled.
• Install the safety reversing sensor so beam is NO
HIGHER than 6" (15 cm) above garage floor.
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Sending sensor - amber LED
6" (15 cm) max. above floor
If either of the sensor LEDs are off, there is no power to the sensor:
1. Check that you have power to the garage door opener.
2. Check the sensor wire is not shorted or broken.
3. Check that the sensors are wired correctly; white wires to white terminal and white/black wires to grey terminal.
If the green receiving sensor LED is blinking, the sensors are obstructed or misaligned:
1. Check for obstructions in the sensor light beam.
2. Align the sensors.
3. If the receiving sensor (green LED) faces direct sunlight, switch the sensors to opposite sides of the door to assure
proper operation.
12
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. 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.
Light Beam Protection Area
For the complete manual visit LiftMaster.com/Customer-Support
W i g n N
Receiving sensor - green LED
6" (15 cm) max. above floor
Receiving sensor has a
sticker on the back.
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