Chamberlain HD930EV User Manual download pdf (Page 32)

Adjustments

STEP 2 Test the Safety Reversal System

Withouta properly installed safetyreversal system, persons (particularly small children) could be

SERIOUSLY INJURED or KILLED by a closing garage door.

Safety reversal system MUST be tested every month.

After ANY adjustments are made, the safetyreversal system MUST be tested. Door MUSTreverse

on contactwith 1-1/2" (3.8 cm) high object(or 2x4 laid flat) on the floor.

1. With the door fully open, place a 1-1/2 inch (3.8 cm) board (or a 2x4 laid flat) on the floor,

centered under the garage door.

2. Operate the door in the down direction. The door MUSTreverse on striking the obstruction.

If the door stopsand does notreverse on the obstruction, the down travel needs to be increased (refer to

AdjustmentStep 1). Repeat the test.When the door reverseson the 1-1/2" (3.8 cm) board (or 2x4 laid

flat), remove the obstruction and run the opener through 3 or 4 complete travel cycles to testadjustment.

If the garage door opener continues to fail the safetyreversal test,call a trained door systemstechnician.

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STEP 3 Test the Protector System

Withouta properly installed safetyreversing sensor,persons(particularlysmall children) could be

SERIOUSLY INJURED or KILLED by a closing garage door.

1. Open the door. Place the garage door opener carton in the path of the door.

2. Press the remote control push button to close the door. The door will notmove more than an inch

(2.5 cm), and the garage door opener lightswill flash 10 times.

The garage door opener will not close from a remote control if the LEDin either safetyreversing sensor

is off (alerting you to the fact that the sensor is misaligned or obstructed). If the garage door opener

closes the door when the safetyreversing sensor is obstructed (and the sensors are no more than 6

inches [15 cm] above the floor), call for a trained door systems technician.

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Chamberlain HD930EV User Manual Page 32