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LiftMaster 3850 Support Question

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Question posted by stephenjpowers60 on July 18th, 2012

Replacement Battery

what is the replacement battery and procedure for replacing battery in Liftmaster 3850P garage door opener?

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Related LiftMaster 3850 Manual Pages

3850 Elite Series Manual - Page 1

...; GARAGE DOOR OPENER Models 3850 3850-267 For Residential Use Only Com Details The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com patible with See Page 29 for Owner's Manual ■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual near the garage door after installation. ■ The door...
3850 Elite Series Manual - Page 2

...garage door opener 26 Using the wall-mounted door control 27 Using the remote control 28 Troubleshooting 28 The remote control battery 28 EverCharge® Standby Power System (optional 29 To open the door manually 30 Care of your garage door and/or the garage door opener...INTRODUCTION Safety Symbol and Signal Word Review This garage door opener has been designed and tested to the ...
3850 Elite Series Manual - Page 3

.... • Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to see if there is not sticking or binding: 1. Release the door. An unbalanced garage door may not reverse when required. • NEVER try to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware, ALL of balance...
3850 Elite Series Manual - Page 4

... details. See page 19 for lightweight garage doors (fiberglass, steel, aluminum, door with the installation of the conditions below apply to your installation. See page 12. Planning Identify the type and height of your opener. Vertical Centerline of Door Access Door Wallmounted Door Control Safety Gap between floor and bottom of door must not exceed 1/4" (6 mm). Safety Reversing...
3850 Elite Series Manual - Page 5

...3850 (1) 3850-267 (2) SECURITY✚® Keyless Entry Model 3850-267 (1) ONLY Motor Unit with Light Lenses 2-Conductor Bell Wire White & White/Red Belt Pulley Bracket Trolley Optional EBvearttCehryarge® Stan(PdbacykPeodwSeerpSaryastteelym) (battery... installation is missing, carefully check the packing material. Carton Inventory Your garage door opener is packaged in the foam.
3850 Elite Series Manual - Page 6

... brace it is finger tight against the trolley (Figure 1). To avoid SERIOUS damage to opener, ONLY use any other bolts will cause serious damage to do so. • Remove... Attach the Rail to the Motor Unit To avoid installation difficulties, do not run the garage door opener until instructed to door opener. • Position belt over belt pulley. Use only these bolts! Rotate about 1/4 ...
3850 Elite Series Manual - Page 7

... your garage door opener. An improperly balanced door may not reverse when required and could be made by a trained door systems technician BEFORE installing opener. 4. Install wall-mounted garage door control: • within sight of the garage door. • out of reach of children at minimum height of 5 feet (1.5 m). • away from electrocution, disconnect ALL electric and battery power...
3850 Elite Series Manual - Page 8

...-piece door without track. Open your door to garage door types. Draw an intersecting horizontal line on header wall or ceiling, otherwise garage door might not reverse when required. Header Wall Unfinished Ceiling 2x4 Vertical Centerline of Garage Door 2x4 OPTIONAL CEILING MOUNT FOR HEADER BRACKET Structural Supports Level (optional) Installation procedures vary according...
3850 Elite Series Manual - Page 10

... Header Wall Header Bracket Belt Pulley Bracket Garage Door INSTALLATION STEP 3 Attach the Rail to the Header Bracket • Position the opener on a temporary support to allow the rail to secure. Have someone hold the opener securely on the garage floor below the header bracket. NOTE: If the door spring is in the way you'll...
3850 Elite Series Manual - Page 11

... Trolley Release Arm RELEASED ONE-PIECE DOOR WITHOUT TRACK • With the door fully open and parallel to the top of the door. • Using a stepladder as illustrated. INSTALLATION STEP 4 Position the Opener Follow instructions which apply to -rail distance. • Raise the opener onto a stepladder. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on...
3850 Elite Series Manual - Page 13

... motor unit. DO NOT overtighten. • Replace cover by gently prying at lower temperatures although the door control remains fully functional. If installing into gang box) as the secondary door control. 1. NOTE: The functional temperature range of the door control to secure. Use insulated staples to each garage door opener. DO NOT connect power and operate the...
3850 Elite Series Manual - Page 14

... lit for replacement. Release Tab 100 Watt (Max) Standard Light Bulb 100 Watt (Max) Standard Light Bulb Lens Hinge 14 Light bulb size should be A19, standard neck only. Use ONLY incandescent. Then the lights will turn OFF. • Reverse the procedure to close the lens. • Use A19, standard neck garage door opener bulbs...
3850 Elite Series Manual - Page 15

... pull door open door falling rapidly and/or unexpectedly. • NEVER use emergency release handle unless garage doorway is CLOSED. the white (neutral) wire to install the proper outlet. To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: • Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. • Garage door installation...
3850 Elite Series Manual - Page 28

... the door should not move. The Remote Control Battery To prevent possible SERIOUS INJURY or DEATH: • NEVER allow small children near batteries. • If battery is disabled by pressing a button. To replace the batteries, remove the two screws and open the remote control housing. Replace the batteries with a proximity lighting feature. LED and Opener Batteries Proximity Battery Spring...
3850 Elite Series Manual - Page 29

... electrical outlet. • A solid orange LED indicates the battery is operating on battery power. • A flashing orange LED with beep indicates the unit is operating on battery power and that the battery charge is low. • To test the battery is functioning properly, open and close the garage door. • Re-connect the motor unit power cord back...
3850 Elite Series Manual - Page 31

... activates the light on the following page. 2. My garage door opener beeps: • A solid LED with beep, sounding approximately every 2 seconds, indicates the motor unit is activating the door and is operating off when door is open: • The garage door opener is equipped with beep, sounding every 30 seconds, indicates battery is approximately 1-1/4" (3.18 cm) in the down travel...
3850 Elite Series Manual - Page 32

... Installed Safety Reversing Sensor Your garage door opener is programmed with jumper wire. OR 2 FLASHES Safety reversing sensors wire shorted or black/white wire reversed. Symptom: No movement, motor runs 2-3 seconds. • Reconnect the emergency release. • Motor may need to travel 2-3 inches, check the travel module connection or replace the travel module. See...
3850 Elite Series Manual - Page 33

... AND ESPAÑOL Message MOTION SENSING ON MOTION SENSING OFF Message BATTERY BACKUP ENABLED Message BATTERY BACKUP ENABLED Message BATTERY LOW BATTERY BACKUP ENABLED Message BATTERY BAD REPLACE BATTERY NOW SEE OWNER'S MANUAL Message POWER RESTORED BATTERY CHARGING Meaning: This message will toggle to the opener. Pressing the button will appear when the 'Lock' button has been pressed...
3850 Elite Series Manual - Page 38

...battery. Enables homeowner to open or closed. Tells you if your home! Wireless Door Control: Push bar, light feature and auxiliary button. Laser Park Assist: Laser enables homeowners to the garage door opener. Also can be limited to operate garage door opener from car, bedside, or anywhere in the garage... homeowner to protect LiftMaster® garage door openers against damage from ...
3850 Elite Series Manual - Page 40

... lifetime of shipping instructions when you will be repaired or replaced (at Seller's sole option) at Seller's sole option. THIS LIMITED WARRANTY DOES NOT COVER ANY PROBLEMS WITH, OR RELATING TO, THE GARAGE DOOR OR GARAGE DOOR HARDWARE, INCLUDING BUT NOT LIMITED TO THE DOOR SPRINGS, DOOR ROLLERS, DOOR ALIGNMENT OR HINGES. THIS LIMITED WARRANTY ALSO DOES NOT...

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