Chamberlain 3800PC - Manuel (Page 18)

18
Receiving Sensor
Green LED
Sending Sensor
Amber LED
Installation
TROUBLESHOOTING THE SAFETY REVERSING SENSORS
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 safety reversing sensors and opener.
• A broken wire.
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.
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 remote lights will blink 10 times. (If bulbs are not installed, 10 clicks can be
heard.) See page 15.
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 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 the safety reversing sensor until it
receives the sender’s beam. When the green indicator light glows steadily, tighten the
wing nut.
1
2
3
1
2
3