LiftMaster 8587WL Owners Manual - English French Spanish - Page 24

Align the Safety Reversing Sensors, Ensure the Control Panel is Wired Correctly

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Power 2 Align the Safety Reversing Sensors IMPORTANT: The safety reversing sensors MUST be connected and aligned correctly before the garage door opener will move in the down direction. When the garage door opener has power, check the safety reversing sensors. If the sensors are aligned and wired correctly, both LEDs will glow steadily. SAFETY SENSOR TROUBLESHOOTING 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. 1 2 3 Light Beam Protection Area RED WHITE WHITE GREY Sending sensor - amber LED Receiving sensor - green LED The receiving sensor has a sticker on the back. To align the safety reversing sensors: 1. Loosen the wing nuts. 2. Adjust the sensors up or down until both LEDs glow steady indicating alignment. 3. Tighten the wing nut to secure the sensor. 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 receiving sensor with the sending sensor and repeat 1 Install the Safety Reversing Sensors page 20 to assure proper operation. 3 Ensure the Control Panel is Wired Correctly If the control panel has been installed and wired correctly, the command LED behind the push bar will blink. Wing nut 24

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24
Power
2 Align the Safety Reversing Sensors
IMPORTANT: The safety reversing sensors MUST be connected and aligned correctly before the
garage door opener will move in the down direction.
When the garage door opener has power, check the safety reversing sensors. If the sensors are
aligned and wired correctly, both LEDs will glow steadily.
Light Beam Protection Area
Receiving sensor - green LED
The receiving sensor has a
sticker on the back.
Sending sensor - amber LED
To align the safety reversing sensors:
1.
Loosen the wing nuts.
2.
Adjust the sensors up or down until both LEDs glow steady indicating alignment.
3.
Tighten the wing nut to secure the sensor.
Wing nut
SAFETY SENSOR TROUBLESHOOTING
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.
RED
WHITE
WHITE
GREY
3
2
1
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 receiving sensor with
the sending sensor and repeat 1 Install the Safety Reversing Sensors page 20 to assure
proper operation.
3 Ensure the Control Panel is Wired Correctly
If the control panel has been installed and wired correctly, the command LED behind the push bar
will blink.