LiftMaster 81602MC Owners Manual - English French Spanish - Page 27

Align the Safety Reversing Sensors, SAFETY SENSOR TROUBLESHOOTING

Page 27 highlights

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. 1 2 3 Light Beam Protection Area 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 23 to assure proper operation. RED WHITE WHITE GREY Wing nut 27

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27
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.
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 23 to assure
proper operation.