Craftsman 139.53669SRT Owner's Manual download pdf (Page 21)

Invisible Light Beam

Protection Area

Sensor

Connect Wire to

Opener Terminals

Bell Wire

Finished

Ceiling

Sensor

Connections

Door Control

Connections

(dotted line)

OPENER TERMINAL SCREWS

2 3

1/4-20 x 1-1/2"

Hex Bolt

"C" Wrap

Sensor

with Wire

Wing

Nut

Indicator

Light

Hex Bolt

1/4-20x1-1/2"

Wing Nut

Hardware Shown Actual Size

Figure 6

Figure 7

• Center each sensor unit in a "C" wrap with lenses

pointing toward each other across the door

(see Figure 6).

• Secure sensors with the hardware shown. Finger

tighten the wing nut on the receiving eye to allow

for final adjustment. Securely tighten the sending

eye wing nut.

• Run the wires from both sensors to the opener.

Use insulated staples to secure wire to wall and

ceiling.

• Strip 1/4" of insulation from each set of wires.

Separate white and white/black wires sufficiently to

connect to the opener terminal screws: white to 2

and white/black to 3.

Aligning the Safety Sensors

• Plug in the opener. Green indicator lights in both

the sending and receiving eyes will glow steadily if

wiring connections and alignment are correct.

The sending eye indicator light will glow regardless

of alignment or obstruction. If the indicator light is

off, dim or flickering in the receiving eye (and the

invisible light beam path is not obstructed),

alignment is required.

• Loosen the sending eye wing nut and re-adjust,

aiming directly at the receiving eye. Lock in place.

• Loosen the receiving eye wing nut and adjust

sensor vertically and/or horizontally until it receives

the sender’s beam. When the green indicator light

glows steadily, tighten the wing nut.

Trouble Shooting

1. If the sending eye indicator light does not glow

steadily after installation, check for:

• Electric power to the opener.

• A short in the white or white/black wires. These

can occur under staples or at screw terminal

connections.

• Incorrect wiring between sensors and opener.

• An open wire (wire break).

2. If the sending eye indicator light glows steadily but

the receiving eye indicator light doesn't:

• Check alignment.

• Check for an open wire to the receiving eye.

3. If the receiving eye indicator light is dim, realign

either sensor.

NOTE: When the invisible beam path is obstructed or

misaligned while the door is closing, the door will

reverse. If the door is already open, it will not close.

The opener light will flash 10 times. (If bulb is not

installed, 10 clicks are audible.) See page 19.

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Craftsman 139.53669SRT Owner's Manual Page 21

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