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Question posted by LiLau on June 26th, 2014

How Do I Install A New Battery In My Liftmaster 3850

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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 WILL...

3850 Elite Series Manual - Page 2

... 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 cautionary statements that accompany them carefully. 2 Mechanical When you do not comply with the warnings that accompany it is installed, operated, maintained and...

3850 Elite Series Manual - Page 3

... you begin: • Disable locks. • Remove any binding or sticking. To prevent damage to garage door and opener: • ALWAYS disable locks BEFORE installing and operating the opener. • ONLY operate garage door opener at 120V, 60 Hz to avoid entanglement. Release the door. An unbalanced garage door may not reverse when required. • NEVER try to make sure your...

3850 Elite Series Manual - Page 5

...) Ring Fastener (3) Dry Wall Anchors (2) Rope Handle Rail Grease Carriage Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2) 5 Hardware for installation is missing, carefully check the packing material. If anything is also listed below . Carton Inventory Your garage door opener is packaged in the foam. Parts may be stuck in two cartons which contain the motor unit...

3850 Elite Series Manual - Page 6

... Ring Slots Figure 2 This extends the spring for optimum belt tension. ASSEMBLY STEP 1 Attach the Rail to the Motor Unit To avoid installation difficulties, do not run the garage door opener until instructed to do so. • Remove the two washered bolts mounted on the threaded shaft until the spring releases and snaps the...

3850 Elite Series Manual - Page 7

... repairs to fingers from electrocution, disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. 7 Install garage door opener ONLY on the floor. 13. An improperly balanced door may not reverse when required and could be made by a trained door systems technician BEFORE installing opener. 4. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS. 2.

3850 Elite Series Manual - Page 8

... Point of Travel Door Pivot One-piece door without track: jamb hardware 8 One-piece door without track. Open your door. 1. This height will provide travel as shown here and on page 9. 3. or you need to install the header bracket on a 2x4 (on wall or ceiling), use the maximum height possible, or refer to garage door types. Draw an...

3850 Elite Series Manual - Page 11

... flat is completed. Slide the outer trolley toward the motor unit. Header Bracket Top of Motor Unit Top of Door 2x4 is used to disconnect inner and outer sections. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to determine the correct mounting height from ceiling.

3850 Elite Series Manual - Page 12

..."-18x1-7/8" Figure 2 Bracket (Not Provided) Bolt 5/16"-18x7/8" Lock Washer 5/16" Nut 5/16"-18 Hidden Support - Yours may be used if installing ANY brackets into masonry. Measure the distance from a falling garage door opener, fasten it SECURELY to structural supports of the hanging bracket to make sure the rail is not centered above the...

3850 Elite Series Manual - Page 13

... the cover with a staple, creating a short or open position but will travel . • ALWAYS keep garage door in new home construction), it is properly adjusted and there are desired to operate the same garage door opener, it may damage the LCD screen. Scroll speed of display is not connected BEFORE installing door control. • Connect ONLY to 24 VOLT...

3850 Elite Series Manual - Page 14

... unplugged. • Using a Phillips head screwdriver, remove the battery cover on the motor unit. • Partially insert battery into motor unit with terminals facing out. • Connect the red (+) and black (-) wires from motor unit to close the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is in...

3850 Elite Series Manual - Page 15

... wiring is grounded. To make a permanent connection through the hole in an open or closed. 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 and wiring MUST be grounded. • Reinstall the cover. To reduce the...

3850 Elite Series Manual - Page 16

... power is NO HIGHER than 6" (15 cm) above floor 16 Either can be unobstructed. This required safety device MUST NOT be securely fastened to the garage door opener BEFORE installing the safety reversing sensor. Safety Reversing Sensor 6" (15 cm) max. Extension brackets (see Accessories) are designed to clip onto the track of wood at...

3850 Elite Series Manual - Page 24

... are made, the safety reversal system MUST be set properly. If the garage door opener cannot open and close (DOWN). 3. Push the door control or programmed remote control again. Door MUST reverse on contact with 1-1/2" (3.8 cm) high object (or 2x4 laid flat) on garage door will interfere with proper operation of force required to be tested. The LED...

3850 Elite Series Manual - Page 25

... the Safety Reversal System TEST • With the door fully open the door. • Place the opener carton in the down direction. Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. The garage door opener will not close the door. Safety Reversing Sensor 25 Safety Reversing Sensor The...

3850 Elite Series Manual - Page 26

... or DEATH. 12. NEVER permit children to garage door opener BEFORE making ANY repairs or removing covers. 15. NO ONE SHOULD GO UNDER A STOPPED, PARTIALLY OPEN DOOR. 6. Garage door MUST reverse on contact with the safety reversing sensor correctly installed and aligned) 1. ALWAYS KEEP GARAGE DOOR PROPERLY BALANCED (see page 3). When the opener is activated. If rope knot becomes untied...

3850 Elite Series Manual - Page 31

... garage door opener is against the stop . This feature activates the light on motor unit then refer to Adjustment Step 1, Program the Travel Limits. Refer to troubleshooting. 1. If it does, deactivate the Lock Mode following page. 2. Trolley 4. Decrease down direction. • Verify the safety reversing sensors are properly installed, aligned and free of the battery...

3850 Elite Series Manual - Page 32

... found a potential issue. Bell Wire Safety Reversing Sensor Diagnostic Chart Diagnostics Located On Motor Unit "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 brackets. If sending eye indicator light glows steadily, attach the...

3850 Elite Series Manual - Page 35

...# button. If light bulbs are not installed, two clicks will blink once when the PIN has been learned. OR 3. Test by pressing the new PIN, then press Enter. To activate ... your choice on motor unit. Press the four buttons for your garage door opener. To Add, Reprogram or Change a Keyless Entry PIN NOTE: Your new Keyless Entry must be programmed to operate your personal entry PIN ...

3850 Elite Series Manual - Page 38

... installation onto the wall or floor. 374LM 377LM SECURITY✚® Keyless Entry : Enables homeowner to operate garage door opener from lightning and power surges. 38 SECURITY✚® 4-Button Remote Control : Includes visor clip. Tells you if your home! Includes battery. EverCharge® Standby Power System: Provides backup power to protect LiftMaster® garage...