Figure 5, Glow steadily w, Sending eye – Craftsman 1/2 HP GARAGE DOOR OPENER 139.53978SRT User Manual
Page 23: Receiving eye, Glows steadily, Figure 6 wiring the safety sensors figure 5, Glow steadily e^ex, Glows steadiiydux
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MOUNTING AND WIRING THE SAFETY SENSORS
• Slide a 1/4"-20x1/2" carriage bolt head into the slot on
each sensor. Use wing nuts to fasten sensors to
brackets, with lenses pointing toward each other
across the door. Be sure the lens is not obstructed by
a bracket extension. See Figure 5.
• Finger tighten the wing nuts.
• Run the wires from both sensors to the opener. Use
insulated staples to secure wire to wail 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. The indicator lights in both the
sending and receiving eyes will
glow steadily W
wiring
connections and alignment are correct.
The
sending eye
orange indicator tight 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
indicator light
glows steadily,
tighten the wing nut.
Figure 6 Wiring the Safety Sensors
Figure 5
Wing nut
1/4"-20xl/2'
Carriage boH
Trouble Shooting the Safety Sensors
1. If the
sending eye
indicator light does not
glow
steadily e^ex
installation, check for:
• Electric power to the opener.
• A short in the white or white/black wires. These can
occur at staples, or at screw terminal connections.
• Incorrect wiring between sensors and opener.
• A broken wire.
2. If the sending eye indicator light
glows steadiiyduX
the
receiving eye indicator light doesn't:
• Check alignment.
• Check for a broken wire to the receiving eye.
3. If the receiving eye indicator light is dim, realign either
sensor.
NOTE: W hen the invisible beam path is obstructed or
m isaligned while the door is dosing, the door wilt
reverse, if the door is already open, it will not dose. The
opener lights will flash 10 tim es, (if bulbs are not
installed, 10 dicks can be heard.) See page 21.
Bell Wire
' Sensor
Invisible Light Beam
Protection Area
23