Craftsman 57918 Owner's Manual download pdf (Page 31)

INSTALLATION STEP 14

Aligning the Safety Reversing Sensors

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 and the garage door opener lights

will flash ten times. If the door is already open, it will not close.

1. 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.

The sensors can be aligned by loosening the wing nuts, aligning

the sensors, and tightening the wing nuts.

IF THE AMBER LED ON THE SENDING SENSOR IS NOT

GLOWING:

1. Make sure there is power to the garage door opener.

2. Make sure the sensor wire is not shorted/broken.

3. Make sure the sensor has been wired correctly: white wires to

white terminal and white/black wires to grey terminal.

IF THE GREEN LED ON THE RECEIVING SENSOR IS NOT

GLOWING:

1. Make sure the sensor wire is not shorted/broken.

2. Make sure the sensors are aligned.

RED

WHITE

GREY

Green LED

SENDING SENSOR

RECEIVING SENSOR

Amber LED

If the receiving sensor is in direct sunlight, switch

it with sending sensor so it is on the opposite

side of the door.

(invisible light beam)

Figure 1

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Craftsman 57918 Owner's Manual Page 31