Craftsman 139.53800SRT Owner's Manual page 23

• 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.
• Plug in the opener. Make sure the Lock Feature is
off . Green indicator lights in both the sending and
receiving eyes will glow steadily if wiring
connections and alignment are correct.
If the indicator light is off in the receiving eye (and
the invisible light beam path is not obstructed),
alignment is required.
• Loosen the receiving eye wing nut to allow slight
rotation of unit. Adjust sensor vertically and/or
horizontally until the green indicator light glows
with a steady light.
• When indicator lights are glowing steadily in both
units, tighten the wing nut in the receiving eye unit.
Hardware Shown Actual Size
1/4-20x1-1/2"
Hex Bolt
Bell Wire
Invisible Light Beam
Sensor
Wing Nut
Finished
Ceiling
Sensor
Protection Area
Figure 6
"C" Wrap
Indicator
Light
1/4-20 x 1-1/2"
Hex Bolt
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.
Figure 7
Bell Wire
23
Wing
Nut
Sensor
with Wire
Connect Wire to
Opener Terminals
Sensor
Door Control
Connections
Connections
(dotted line)
1 2
OPENER TERMINAL SCREWS
3