Craftsman 139.53990 Owner's Manual page 23

MOUNTING ANDWIRING THESAFETY SENSORS
• Slide a 114"-20x112" carriage bolt head into the slot
on each sensor, Use wing nuts to fasten sensors to
brackets, with lenses pointingtoward each other
across the door. Be sure the lens is not obstructed
by a bracket extension (Figure 4).
• Finger tighten the wing nuts.
• Run the wires from both sensors to the opener. Use
insulated staples to secure wire to wall and ceiling.
• Strip 7/16" of insulationfrom each set of wires.
Separate white and white/black wires sufficientlyto
connect to the opener quick-connectterminals.
Twist like coloredwires together. Insert wires into
quick-connect holes: white to white and white/black
to grey (Figure 5).
AUGNING THE SAFETY SENSORS
• Plug in the opener. The indicator lights in both the
sending and receiving eyes will glow steadily if
winng connections and alignment are correct.
The sending eye orange indicator light will glow
regardless of alignment or obstruction.If the green
indicator light in the receiving eye is off, dim, or
flickering (and the invisible light beam path is not
obstructed), alignment is required.
• Loosen the sending eye wing nut and readjust,
aiming directly at the receiving eye. Lock in place.
• Loosen the receiving eye wing nut and adjust
sensor until it receives the sender's beam. When
the green indicatorlight glows steadily, tighten the
wing nut.
Figure 5
Figure 4
Carnagebolt "_"
1/4"-20xl/2"
TROUBLESHOOTING THE SAFETY SENSORS
1. If the sending eye indicator light does not glow
steadily after installation,check for:
• Electdc power to the opener.
• A short in the white or white/black wires. These
can occur at staples, or at opener connections.
• Incorrectwiring between sensors and opener.
• A broken wire.
2. If the sending eye indicator light glows steadilybut
the receivingeye indicator light doesn't:
• Check alignment.
• Check for an open wire to the receivingeye.
3. If the receivingeye indicator light is dim, realign
either sensor.
NOTE: When the invisiblebeam path is obstructed
or misaligned while the door is closing, the door will
reverse. If the door is already open, it willnot close.
The opener lights will flash 10 times. See page 21.
Coflnect w'we to
Bell Wire Finished
-- Ceg_g --
1. Stdp wire 7n6"
2+ Twist _e colored
wires together
23
3. Inset into
appropriate terminals
Quk:k-Connect Terrrdna_