Chamberlain ATS Owner's Manual page 18

Connect to garage door opener:
• Strip 1/4" (6 mm) of insulation from each set of wires.
Separate white and white/black wires suffi ciently to
connect to the opener terminal screws: white to 2 and
white/black to 3 (Figure 11).
Figure 11
- Finished Ceiling -
Bell Wire
Safety Reversing
Sensor
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 indicator light will glow regardless of
alignment or obstruction. If the indicator light in the
receiving eye is off, dim, or fl ickering (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.
Safety Reversing
Invisible Light Beam
Sensor
Protection Area
Connect Wire to
Opener Terminal Screws
Bell Wire
1. Strip wire 1/4" (6 mm)
2. Connect to the opener terminal screws
Door Control Connections
(Dotted Line)
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. (If bulbs are not installed, 10
clicks can be heard.) See page 15.
18
1/4" (6 mm)
Safety Reversing
Sensor Connections
OPENER TERMINAL SCREWS