Align The Safety Reversing Sensors - Chamberlain RJO20 Manual

Installation
(continued)
12

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 garaged door opener has power, check the safety reversing sensors. If the sensors are aligned and wired correctly,
both LEDs will glow steadily.
Sending sensor - amber LED
TO ALIGN THE SAFTY 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.
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 is 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 receiving sensor
with the sending sensor and repeat STEP
10 Install the Protector System
to assure proper operation.
Light Beam Protection Area
1
® page 17
Receiving sensor - green LED
2
21
Wing nut
3