LiftMaster Commercial Protector System CPS-U Manuel page 4

TEST

1. Connect power to the operator.

2. Align the photoelectric sensors so the green LED on the emitter sensor and the green LED on the receiver sensor glow steadily. If both green

LEDs blink (and the invisible light beam path is not obstructed), alignment is required:

• Loosen the receiver sensor wing nut to allow slight rotation of the sensor. Adjust sensor vertically and/or horizontally until both green

indicator lights glow steadily.

• When the indicator lights are glowing in both sensors, tighten the receiver sensor wing nut.

3. Press the OPEN button to fully open the door.

4. Press the CLOSE button to close the door.

5. Obstruct the light beam while the door is closing. The door should stop and reverse.

The operator will not close if the indicator lights are blinking, alerting you to the fact that the sensor is misaligned or obstructed.

TROUBLESHOOTING

If the emitter sensor and receiver sensor indicator lights do not glow steadily after installation, check for:

• Photoelectric sensor alignment

• Obstruction

• Power to the operator

• A short or broken wire

• Incorrect wiring between photoelectric sensors and the operator

If the receiver 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 receiver sensor.

If the emitter sensor and receiver sensor indicator lights are both glowing steadily but interrupting the photoelectric sensors does

not cause the door to reverse when closing, check both sensors to make sure one sensor is the emitter and the other is a receiver

sensor as indicated on the sensor housing.

NOTES:

• Direct sunlight to the receiver sensor may prevent the operator from closing even when both the emitter and receiver indicator lights

are illuminated. Swapping the position of the emitter and receiver sensors will resolve this issue.

• Professional service is required if the operator closes the door when the photoelectric sensors are obstructed.

WARRANTY

LiftMaster

warrants to the ﬁ rst consumer purchaser of this product that it is free from defect in materials and/or workmanship for a period of 1

year from the date of purchase.

Indicator

Light

6" (15 cm) max. above ﬂ oor

FOR SERVICE OR TO ORDER REPAIR PARTS DIAL:

1-800-528-2806

LiftMaster.com

Indicator

Light

6" (15 cm) max. above ﬂ oor