User manual CHAMBERLAIN 3840

[. . . ] 845 Larch Avenue Elmhurst, Illinois 60126-1196 www. LiftMaster. com ® GARAGE DOOR OPENER Model 3840 For Residential Use Only Co m t pa ible with Se r eP fo age 30 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. [. . . ] If the garage door opener cannot open and close the door fully, inspect the door to ensure that it is balanced properly and is not sticking or binding. If the door is not stopping exactly where you would like it, repeat Program the Travel Limits. Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. · Too much force on garage door will interfere with proper operation of safety reversal system. · NEVER use force adjustments to compensate for a binding or sticking garage door. · After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" (3. 8 cm) high object (or 2x4 laid flat) on floor. Figure 1 Side Panel LED Black Button Purple Button Figure 2 Figure 3 LED Push Purple button twice to enter unit into Force Adjustment Mode Black Button Purple Button LIGH LOC K T or 24 ADJUSTMENT STEP 3 Test the Safety Reversal System TEST · With the door fully open, place a 1-1/2" (3. 8 cm) board (or a 2x4 laid flat) on the floor, centered under the garage door. · Operate the door in the down direction. The door must reverse on striking the obstruction. ADJUST · If the door stops on the obstruction, it is not traveling far enough in the down direction. Complete Adjustment Steps 1 and 2 Programming the Limits and Forces. NOTE: On a sectional door, make sure limit adjustments do not force the door arm beyond a straight up and down position. · When the door reverses on 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 test adjustment. · If the opener continues to fail the Safety Reverse Test, call for a trained door systems technician. IMPORTANT SAFETY CHECK: Test the Safety Reverse System after: · Each adjustment of door arm length, limits, or force controls. · Any repair to or adjustment of the garage door (including springs and hardware). · Any repair to or buckling of the garage floor. · Any repair to or adjustment of the opener. Without a properly installed safety reversal 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 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 the floor. 1-1/2" (3. 8 cm) board (or a 2x4 laid flat) ADJUSTMENT STEP 4 Test The Protector System® (Safety Reversing Sensors) · Press the remote control push button to open the door. [. . . ] 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: 1-800-528-9131 www. liftmaster. com For professional installation, parts and service, contact your local LIFTMASTER/CHAMBERLAIN dealer. Look for him in the Yellow Pages, or call our Service number for a list of dealers in your area. 1-800-528-9131 LIFTMASTER® FIVE-YEAR LIMITED WARRANTY LIFETIME MOTOR LIMITED WARRANTY The Chamberlain Group, Inc. [. . . ]