Test Safety Reverse System; Install The Protector System - Chamberlain 550 Owner's Manual

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Adjustment

THE SAFETY REVERSE SYSTEM TEST IS IMPORTANT. GARAGE DOOR MUST REVERSE ON CONTACT WITH A

ONE INCH OBSTACLE PLACED ON THE FLOOR. FAILURE TO PROPERLY ADJUST OPENER MAY RESULT IN

SERIOUS PERSONAL INJURY FROM A CLOSING GARAGE DOOR. REPEAT TEST AT LEAST FOUR TIMES A YEAR

AND ADJUST AS NEEDED..

PROCEDURE: Place a 1-inch obstacle on the floor under the

garage door. Operate door in DOWN direction. The door must

reverse on the obstruction.

If a the door STOPS on the obstruction, it is not traveling far

enough in the DOWN direction. Increase the DOWN limit by

turning DOWN limit adjustment screw counterclockwise 1/4 turn.

REPEAT TEST.

NOTE: Make sure limit adjustments do not force the door

arm beyond a straight up and down position. See the

illustration on Page 13.

When the door reverses on the 1-inch obstacle, remove the

obstruction and run the opener through a complete travel cycle.

Door MUST NOT reverse in closed position. If it does, repeat

Adjustment Steps 1, 2 and 3.

REPEAT ADJUSTMENT STEP 3 AFTER:

• EACH ADJUSTMENT OF DOOR ARM LENGTH, CLOSE FORCE OR DOWN LIMIT.

• ANY REPAIR OR ADJUSTMENT OF GARAGE DOOR (INCLUDING SPRINGS AND HARDWARE).

• ANY REPAIR OR BUCKLING OF THE GARAGE FLOOR.

• ANY REPAIR OR ADJUSTMENT OF THE GARAGE DOOR OPENER.

(Optional)

The PROTECTOR SYSTEM

measure of safety against a small child being caught under a

garage door. It uses an invisible beam which, when broken by an

obstruction, causes a closing door to open and prevents an open

door from closing.

After the garage door opener has been completely installed and

adjusted, the PROTECTOR SYSTEM

installed. Instructions are included with this optional device.

STEP 3