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Question posted by dwagrose on December 22nd, 2013

How To Change The Backup Battery In A Lift Master 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. ■...

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...

3850 Elite Series Manual - Page 3

... EXTREME tension. • Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware, ALL of balance. Lift the door about halfway as illustrated below. Release the door. To prevent possible SERIOUS INJURY or DEATH: • ALWAYS call a trained...

3850 Elite Series Manual - Page 5

... all parts illustrated below . Carton Inventory Your garage door opener is also listed below . Hardware for installation is packaged in the foam. LOCK LIGHT SLmCaDrtMCootniotrnolDPeatencetli®ng 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...

3850 Elite Series Manual - Page 6

...use any other bolts will cause serious damage to do not run the garage door opener until instructed to door opener. • Position belt over belt pulley. Washered Bolt 5/16"-18x1...trolley nut on the threaded shaft until it firmly against the trolley (Figure 2). • Place a 7/16" open end wrench on top of the nut ring slots and brace it is finger tight against the trolley (Figure 3)....

3850 Elite Series Manual - Page 7

...next to fingers from electrocution, disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. 7 They could result in garage door or opener mechanisms. 9. Place entrapment warning label on properly balanced and lubricated garage door. ALL repairs to do so. 8. NEVER connect garage door opener to power source until instructed to cables, spring assemblies...

3850 Elite Series Manual - Page 11

... used to determine the correct mounting height from the floor to the top of the door. • Using a stepladder as a support, raise the top of the opener to your door type as illustrated. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to -rail distance. • Raise the...

3850 Elite Series Manual - Page 12

...distance from a falling garage door opener, fasten it SECURELY to structural supports of the garage. Grease the top and underside of the motor unit to make sure the rail is centered over the door (or in the ...trolley slides with the header bracket if the bracket is not centered above the door). 7. Fasten the opener to a support with 5/16"-18x7/8" hex bolts, lock washers and nuts....

3850 Elite Series Manual - Page 13

... 2). 2. To prevent possible SERIOUS INJURY or DEATH from one 398LM can be seen clearly, is properly adjusted and there are desired to operate the same garage door opener, it may damage the LCD screen. CAUTION: Continuous exposure of insulation from electrocution: • Be sure power is not connected BEFORE installing...

3850 Elite Series Manual - Page 14

.... • DO NOT use of lens. To prevent damage to close the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is in each socket. Light bulb size should be A19, standard neck only. ALWAYS wear protective gloves and eye protection when changing the battery or working around the...

3850 Elite Series Manual - Page 15

...a falling garage door: • If possible, use an extension cord, 2-wire adapter, or change plug in...emergency release handle to disengage trolley ONLY when garage door is required by your garage door opener has a grounding type plug with a ...• Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. • Garage door installation and wiring MUST be grounded...

3850 Elite Series Manual - Page 16

... in the down direction. This required safety device MUST NOT be installed on the wall, the brackets must be connected and aligned correctly before the garage door opener will flash 10 times. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly connected and aligned, the sensor will detect an obstacle in masonry if...

3850 Elite Series Manual - Page 24

... travel through a complete cycle, up and down, in order for a binding or sticking garage door. • After ANY adjustments are made, the safety reversal system MUST be tested. If the garage door opener cannot open (UP). 4. Push the door control or programmed remote control. The LED will close (DOWN). 3. Figure 1 n n LED Black Button Purple Button Figure 2 Push...

3850 Elite Series Manual - Page 25

... the obstruction, it is obstructed (and the sensors are made, the safety reversal system MUST be SERIOUSLY INJURED or KILLED by a closing garage door. The garage door opener will flash. ADJUST • If the door stops on the floor. 1-1/2" (3.8 cm) board (or a 2x4 laid flat) ADJUSTMENT STEP 4 Test The Protector System® • Press the remote...

3850 Elite Series Manual - Page 26

...-Held Remote Control: Hold the large push button down until completely closed. If the door has been stopped in an open garage door. If the sensor is not installed, or is adjusted, the other hardware, ALL of which changes with the opener lights on, then press and hold the light button for 10 seconds until the...

3850 Elite Series Manual - Page 31

.... 7. If battery status LED is against the stop . Refer to troubleshooting. 1. My door will not close and the light bulbs blink on when the power is restored, and is low. • If a red LED remains on my motor unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will...

3850 Elite Series Manual - Page 32

... on the safety reversing sensors do not light, replace the safety reversing sensors. 3 FLASHES Door control or wire shorted. 4 FLASHES Safety reversing sensors slightly misaligned (dim or flashing LED).... "Learn" Button LED or Diagnostic LED "Learn" Button Installed Safety Reversing Sensor Your garage door opener is dim or flashing. • Realign receiving eye sensor, clean lens and secure ...

3850 Elite Series Manual - Page 34

... the hand-held remote control. Additional buttons on motor unit until the learn indicator light will be circumvented. PROGRAMMING NOTICE: If this Security✚® garage door opener is factory programmed to circumvent that technical measure. The learn indicator light goes out (approximately 6 seconds). All previous codes are not installed, two clicks will...

3850 Elite Series Manual - Page 35

... feature press and hold the # button. When the motor unit lights blink, it may authorize access by pressing the four buttons for your garage door opener. To Add, Reprogram or Change a Keyless Entry PIN NOTE: Your new Keyless Entry must be used up one button close is active. Release the # button. 2. If light bulbs...

3850 Elite Series Manual - Page 38

...Remote Control : With key ring and fastening strip. EverCharge® Standby Power System: Provides backup power to protect LiftMaster® garage door openers against damage from lightning and power surges. 38 Surge Protector: The Garage Door Opener Surge Protector is open garage door manually from outside by adding additional sensor modules. 485LM 395LM Remote Light Control : Enables...