Controlled Products Systems Group CPS-UN4 - Manuel (Page 8)

TROUBLESHOOTING
If the sending sensor and receiving sensor indicator lights do not glow steadily after installation, check for:
• Photoelectric sensor alignment
• Obstruction
• Power to the operator
• A short in the wires
• Incorrect wiring between photoelectric sensors and interface
• A broken wire (open wire)
If receiving sensor indicator light is off or fl ashing (and the invisible light beam path is not obstructed), check alignment
of the sensors and/or for an open wire to the receiving sensor.
If the sending sensor and receiving sensor indicator lights are both glowing steadily but interrupting the photoelectric sensors
does not cause the door/gate to reverse when closing, check both sensors to make sure one sensor is the sending and the other
is a receiving sensor.
NOTES:
• Direct sunlight to the sending sensor may prevent the operator from closing even when both the sending and receiving
indicator lights are illuminated. A protective cover shielding both sensors from direct sunlight will resolve this issue.
• Professional service is required if the operator closes the door/gate when the photoelectric sensors are obstructed.
TEST THE PROTECTOR SYSTEM ®
1. Press the OPEN button to fully open the door/gate.
2. Press the CLOSE button to close the door/gate.
3. Obstruct the light beam while the door/gate is closing. The door/gate should stop and reverse.
The operator will not close if the indicator light in either sensor is not glowing steadily, alerting you to the fact that the sensor is
misaligned or obstructed.
OUR LARGE SERVICE ORGANIZATION
SPANS AMERICA
FOR INSTALLATION AND SERVICE INFORMATION
SIMPLY DIAL OUR TOLL FREE NUMBER:
1-800-528-2806
www.liftmaster.com
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION:
• PART NUMBER
• PART NAME
• MODEL NUMBER
ADDRESS ORDERS TO:
THE CHAMBERLAIN GROUP, INC.
Technical Support Group
6050 S. Country Club Road
Tucson, Arizona 85706
HOW TO ORDER REPAIR PARTS