User manual LIFT-MASTER 2280

[. . . ] 845 Larch Avenue Elmhurst, Illinois 60126-1196 www. liftmaster. com ® ® GARAGE DOOR OPENER Models 2280 1/2 HP 2280-267 1/2 HP 2280-976 1/2 HP For Residential Use Only Owner's Manual Please read this manual and the enclosed safety materials carefully!Fasten the manual near the garage door after installation. The door WILL NOT CLOSE unless the Protector System® is connected and properly aligned. Periodic checks of the opener are required to ensure safe operation. [. . . ] Use a screwdriver to make limit adjustments. Run the opener through a complete travel cycle after each adjustment. NOTE: Repeated operation of the opener during adjustment procedures may cause the motor to overheat and shut off. NOTE: If anything interferes with the door's upward travel, it will stop. If anything interferes with the door's downward travel (including binding or unbalanced doors), it will reverse. HOW AND WHEN TO ADJUST THE LIMITS · If the door does not open completely but opens at least 5 feet (1. 5 m): Increase up travel. Turn the UP limit adjustment screw clockwise. One turn equals 2" (5 cm) of travel. NOTE: To prevent the trolley from hitting the cover protection bolt, keep a minimum distance of 2-4" (5 cm - 10 cm) between the trolley and the bolt. · If door does not open at least 5 feet (1. 5 m): Adjust the UP (open) force as explained in Adjustment Step 2. · If the door does not close completely: Increase down travel. Turn the down limit adjustment screw counterclockwise. One turn equals 2" (5 cm) of travel. If door still won't close completely and the trolley bumps into the pulley bracket (page 4), try lengthening the door arm (page 21) and decreasing the down limit. · If the opener reverses in fully closed position: Decrease down travel. Turn the down limit adjustment screw clockwise. One turn equals 2" (5 cm) of travel. WARNING Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. · Incorrect adjustment of garage door travel limits will interfere with proper operation of safety reversal system. · If one control (force or travel limits) is adjusted, the other control may also need adjustment. · After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" high (3. 8 cm) object (or 2x4 laid flat) on floor. CAUTION WARNING CAUTION To prevent damage to vehicles, be sure fully open door provides adequate clearance. Cover Protection Bolt 2-4" (5-10 cm) Left Side Panel Limit Adjustment Screws ADJUSTMENT LABEL · If the door reverses when closing and there is no visible interference to travel cycle: If the opener lights are flashing, the Safety Reversing Sensors are either not installed, misaligned, or obstructed. Test the door for binding: Pull the emergency release handle. [. . . ] SIMPLY DIAL OUR TOLL FREE NUMBER: HOW TO ORDER REPAIR PARTS Selling prices will be furnished on request or parts will be shipped at prevailing prices and you will be billed accordingly. WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION: · PART NUMBER · PART NAME · MODEL NUMBER ADDRESS ORDERS TO: THE CHAMBERLAIN GROUP, INC. Country Club Road Tucson, Arizona 85706 SERVICE INFORMATION TOLL FREE NUMBER: 1-800-528-2817 HOURS: (Central Std. - Sunday www. liftmaster. com For professional installation, parts and service, contact your local LIFTMASTER/CHAMBERLAIN dealer. [. . . ]