Chamberlain CG40DM - Manual (Page 22)

22
1 2 3
Figure 10
— Finished Ceiling —
Bell Wire
Bell Wire
Connect Wire to
Screw Terminals
Safety
Reversing
Sensor
Safety Reversing
Sensor
Invisible Light Beam
Protection Area
1. Strip wire 7/16"
(11 mm)
7/16" (11 mm)
2. Twist like colored
wires together
Connect to garage door opener
1. 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 10).
3. Connect wire to the opener terminal
screws: white to 2 and white/black to 3.
Door Control
Connections
(dotted lines)
Sensor
Connections
OPENER TERMINAL SCREWS
ALIGNING THE SAFETY REVERSING SENSORS
1. 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 fl ickering (and the invisible
light beam path is not obstructed), alignment is required.
2. Loosen the sending eye wing nut and readjust, aiming
directly at the receiving eye. Lock in place.
3. 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 19.