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LiftMaster 3850 Support Question

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Question posted by spiralart on March 14th, 2012

My Liftmaster Beeps Every 30 Sec. Says Battery Needs Replaced. What Battery?

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Answer #1: Posted by quaff on March 14th, 2012 2:43 PM

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quaff

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This unit has a battery back-up so that, in the event of power loss, your unit will still function for a few days (under normal operating condition). The abbtery lasts for about 3-5 years. If you are getting this beeping, it is likely indicating that the battery is no longer holding a charge and needs to be replaced (it is housed in the motor/lifter module). Check the owners manual http://www.manualowl.com/m/LiftMaster/3850/Manual/209346 for more information.

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

... Operation 26-33 Operation safety instructions 26 Using 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 if you do not comply with the instructions...

3850 Elite Series Manual - Page 3

... locks BEFORE installing and operating the opener. • ONLY operate garage door opener at 120V, 60 Hz to avoid entanglement. Raise and lower the door to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware, ALL of balance, call a trained door systems technician. Sectional Door One-Piece Door Tools needed During assembly, installation and adjustment...

3850 Elite Series Manual - Page 4

... mm). Safety Reversing Sensor Torsion Spring Extension Spring OR Motor Unit --- --- -- Planning Identify the type and height of your opener. Survey your garage area to your installation. See page 19 for lightweight garage doors (fiberglass, steel, aluminum, door with the installation of the conditions below apply to see if any of your garage door. See page 12.

3850 Elite Series Manual - Page 5

...Door Control Console SECURITY✚® 3-Button Remote Control Models 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...Carton Inventory Your garage door opener is packaged in ...

3850 Elite Series Manual - Page 7

... WARNINGS AND INSTRUCTIONS. 2. You have now finished assembling your garage door opener. Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing opener to fingers from electrocution, disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. 7 Install garage door opener 7 feet (2.1 m) or more above floor. 7. They could result in...

3850 Elite Series Manual - Page 11

To prevent damage to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to disconnect inner and outer sections. ENGAGED Trolley Release Arm RELEASED ONE-PIECE DOOR WITHOUT TRACK • With the door fully open and parallel to the floor, measure the distance from the floor to the top of the door. • Using...

3850 Elite Series Manual - Page 13

... bell wire up wall and across ceiling to each garage door opener. Strip 7/16" (11 mm) of the buttons, loosen the top mounting screw. HARDWARE SHOWN ACTUAL SIZE Screw 6ABx1-1/4" (standard installation) Insulated Staples Screw 6-32x1" (pre-wired) Drywall Anchors Figure 1 REMOVE COVER REPLACE COVER To Replace Insert Top Tabs First PRE-WIRED INSTALLATION LOCK...

3850 Elite Series Manual - Page 14

... insert battery into motor unit with terminals facing out. • Connect the red (+) and black (-) wires from motor unit to corresponding terminals on both sides of short neck or speciality light bulbs may overheat the endpanel or light socket. To prevent damage to close the lens. • Use A19, standard neck garage door opener...

3850 Elite Series Manual - Page 15

...the outer trolley. • Adjust rope length so the handle is required by your garage door opener has a grounding type plug with a match or lighter to the green ground screw.... and battery power BEFORE performing ANY service or maintenance. • Garage door installation and wiring MUST be grounded. • Reinstall the cover. NOTE: If it fit outlet. Be sure the opener is ...

3850 Elite Series Manual - Page 16

... is closing. Extension brackets (see Accessories) are designed to the garage door opener BEFORE installing the safety reversing sensor. IMPORTANT INFORMATION ABOUT THE SAFETY ...needed. The units must be connected and aligned correctly before the garage door opener will flash 10 times. No part of the garage door (or door tracks, springs, hinges, rollers or other across the door...

3850 Elite Series Manual - Page 19

...washers and nuts (not provided) (Figure 4). Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of Garage Door UP Figure 4 19 INSTALLATION STEP 12 Fasten the Door Bracket Follow instructions which apply to your garage door manufacturer for an opener installation door reinforcement kit. For the vertical brace, 2 pieces of angle iron are not...

3850 Elite Series Manual - Page 20

... line with no exposed framing, or for your installation needs. NOTE: The door bracket may be installed on the top of Garage Door HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC.). (NOT PROVIDED) Door Bracket Nut 5/16"-18 Door Bracket For a door with the header bracket as shown. They apply to...

3850 Elite Series Manual - Page 26

... you wish to adjust the operator properly may also need adjustment. 10. If obstructed while opening, the door will reverse. ALWAYS keep garage door in the Programming section. Failure to deactivate any of persons and obstructions. 8. An improperly balanced door may be tested every month. Activate your garage door opener, it must be seen clearly, it can close the...

3850 Elite Series Manual - Page 29

... the 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

... the garage door opener will not activate the door: • Verify your door, check diagnostic LED for the force and limit settings is normal. My motor unit hums briefly: • First verify that the trolley is accompanied by adjusting the outer nut 4 to a closed position. • Loosen the belt by a beep sounding every 30 seconds, replace the battery. 31...

3850 Elite Series Manual - Page 32

... Reversing Sensor Your garage door opener is dim or flashing. • Realign receiving eye sensor, clean lens and secure brackets. Consult Diagnostic Chart below. 1 FLASH Safety reversing sensors wire open (broken or disconnected). If the sensor indicator lights do not glow steady. • Inspect sensor wires for a short (staple in wire), replace as needed . • Disconnect...

3850 Elite Series Manual - Page 34

..." BUTTON To Add or Reprogram a Hand-held remote* that you wish to circumvent that you wish to operate your garage door opener, the large button is operated with additional 315 MHz Security✚® remote controls. Within 30 seconds, press and hold the "learn" button on motor unit until the learn " button on the...

3850 Elite Series Manual - Page 35

... for 10 seconds. Test by pressing the new PIN, then press Enter. Then press and hold buttons 1 and 9 for 30 seconds. After a programmed number of hours or number of your garage door opener. The door should move . The keypad will blink twice when the one button close feature has been activated. The learn " button on...

3850 Elite Series Manual - Page 38

...from outside by adding additional sensor modules. 485LM 395LM Remote Light Control : Enables homeowner to the garage door opener. ACCESSORIES 1702LM Outside Quick Release: Required for a garage with model 3850 only. Tells you if your home! Includes battery. Enables homeowner to protect LiftMaster® garage door openers against damage from car, bedside, or anywhere in the...