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Mounting and wiring the safety reversing sensors, Aligning the safety reversing sensors, Troubleshooting the safety reversingsensors – Chamberlain 3575S User Manual

Page 18

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18

Invisible Light Beam
Protection Area

Safety Reversing Sensor

Safety Reversing Sensor

Connect Wire to
Opener Quick-Connect Terminals

Bell Wire

Bell Wire

Finished
Ceiling

Quick-Connect Terminals

3. To release or insert

wire, push in tab with

screwdriver

tip

1. Strip wire 7/16"
(11 mm)

2. Twist like colored
wires together

7/16"
(11mm)

Red

Grey

White

Carriage Bolt
1/4"-20x1/2"

Lens

Wing Nut
1/4"-20

Figure 5

MOUNTING AND WIRING THE SAFETY REVERSING
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 (Figure 5).

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" (11 mm) of insulation from each set of wires.
Separate white and white/black wires sufficiently to
connect to the opener quick-connect terminals. Twist
like colored wires together. Insert wires into quick-
connect holes: white to white and white/black to grey
(Figure 6).

ALIGNING THE SAFETY REVERSING SENSORS

Plug in the opener. The indicator lights in both the
sending and receiving eyes will glow steadily if wiring
connections and alignment are correct.

The sending eye amber 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
indicator light glows steadily, tighten the wing nut.

TROUBLESHOOTING THE SAFETY REVERSING
SENSORS

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 at staples, or at opener connections.

Incorrect wiring between sensors and opener.

A broken wire.

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
lights will blink 10 times. See page 16.

Figure 6