User manual LIFT-MASTER 2500

[. . . ] 845 Larch Avenue Elmhurst, Illinois 60126-1196 www. liftmaster. com ® GARAGE DOOR OPENER Model 2500 For Residential Use Only Owner's Manual I I I I I 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. [. . . ] · 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 one-inch high object (or 2x4 laid flat) on floor. CAUTION 1. Activate the door using the door control or the remote. The trolley will reconnect and the door will open between 4 and 5 feet. 2. Use the two buttons (1), (2) on the control panel to place the opener into limit setting mode: Press and hold the "Learn" button (2) while you press the "Limit" button on the left (1), then release both buttons. The indicator light (3) will blink slowly. Press the left button (1) until the door travels up to the desired limit. If the door goes above the desired up limit, press the right button (2) to lower it. Check to be sure the door is high enough for your vehicle. Adjust if necessary, using both buttons. Place a one-inch board (or a 2x4 laid flat) on the floor, centered under the garage door. Press the remote (4) or door control push button. The door will travel down, touch the board, then reverse and stop in the up limit position. The indicator light will stop blinking and turn off. The opener has learned the up and down limits. During step 5, if the door reverses before touching the board, increase the down force (See "Force Adjustment"), then repeat steps 1-5 above. If the door stops before reaching the up limit, increase the up force by small adjustments until it reaches the up limit. Repeat step 5. WARNING CAUTION To prevent damage to vehicles, be sure fully open door provides adequate clearance. Force Adjustment Antenna Limit Button (1) (Left) Indicator Light (3) Learn Button (2) (Right) (4) LOCK LIGHT 24 ADJUSTMENT STEP 2 Adjust the Force Force adjustment controls are located on the back panel of the motor unit. Force adjustment settings regulate the amount of power required to open and close the door. If the forces are set too light, door travel may be interrupted by nuisance reversals in the down direction and stops in the up direction. [. . . ] Look for him in the Yellow Pages, or call our service number for a list of dealers in your area. 1-800-528-2817 LIFTMASTER GARAGE DOOR OPENER FIVE-YEAR LIMITED WARRANTY The Chamberlain Group, Inc. ("Seller") warrants to the first retail purchaser of this product, for the residence in which this product is originally installed, that it will be free from any defect in materials and/or workmanship for a period of 60 full months from the date of purchase. Additionally, the motor and drive belt are warranted for the lifetime of the product. The product must be used in complete accordance with Chamberlain's instructions for installation, operation and care. [. . . ]