User manual LIFT-MASTER 1140

[. . . ] 10 Limit Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Force Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Safety Reverse Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 The Protector SystemTM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] FORCE ADJUSTMENT settings regulate amount of the power required to open and close door. NOTE: The door STOPS in the UP direction if anything interferes with its travel. Door REVERSES in the DOWN direction if anything interferes with its travel (including binding or unbalanced doors). If the force adjustments are set too light, door travel may be interrupted by nuisance reversals in DOWN direction and stops in UP direction. Weather conditions can affect the door movement, so occasional adjustment may be needed. Maximum force adjustment range is 260 degrees, about 3/4 of a complete turn. Turn force adjustment controls with a screwdriver. Adjustment Label FORCE ADJUSTMENT CHART TEST DOWN (CLOSE) FORCE Grasp the door handle or door bottom when door is about halfway through DOWN (CLOSE) TRAVEL. If the door is hard to hold or doesn't reverse, decrease DOWN (CLOSE) FORCE by turning the control in a counterclockwise direction. After each adjustment, run opener through a complete cycle. IF DOOR DOESN'T OPEN AT LEAST 5 FEET Increase UP (OPEN) FORCE by turning the control in a clockwise direction. Make 10 degree turn adjustments until door opens completely. Readjust UP LIMIT if necessary. IF DOOR REVERSES DURING DOWN (CLOSE) CYCLE PROCEED TO STEP 3 Increase DOWN (CLOSE) FORCE by turning control clockwise. After each adjustment, run the opener through a complete travel cycle. 21 ADJUSTMENT STEP 3 Test Safety Reverse System PROCEDURE: Place-a one-inch obstacle on the floor under the garage door. If 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. NOTE: Make sure limit adjustments do not force the door arm beyond a straight up and down position. When the door reverses on the one-inch obstacle, remove the obstruction and run the opener through a complete travel cycle. Repeat Adjustment Steps 1, 2 and 3 if necessary. 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 ONCE A MONTH AND ADJUST AS NEEDED. 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 R. · ANY REPAIR OR ADJUSTMENT OF THE GARAGE DOOR OPENER. THE PROTECTOR SYSTEMTM TM Installation of Optional Safety Feature THE PROTECTOR SYSTEM PROVIDES AN ADDITIONAL MEASURE OF SAFETY AGAINST A SMALL CHILD BEING CAUGHT UNDER A GARAGE DOOR. [. . . ] Please be sure to include a brief description of the problem and a dated proof-of-purchase receipt with any product that is returned for warranty repair. Product under warranty, which upon receipt by Chamberlain/Lift-Master is determined to be defective in materials and/or workmanship, will be repaired or replaced (Chamberlain's option) at no cost to you and returned pre-paid. Defective parts will be repaired or replaced with new or factory rebuilt parts at Chamberlain's option. THE DURATION OF IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS LIMITED TO THE DURATION OF THIS WRITTEN WARRANTY. [. . . ]