LiftMaster 3840 3840 Manual
LiftMaster 3840 Manual
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- LiftMaster 3840 | 3840 Manual - Page 1
® GARAGE DOOR OPENER Model 3840 For Residential Use Only Com Details The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.LiftMaster.com patible with See Page 30 for Owner's Manual ■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual - LiftMaster 3840 | 3840 Manual - Page 2
27 Using the remote control 28 Troubleshooting 28 To open the door manually 28 Care of your garage door opener 28 Using the remote control 29 The remote control battery 29 Troubleshooting 29 Standby Power (Optional 30 Having a problem 31 Diagnostic chart 32-33 Programming 34-35 - LiftMaster 3840 | 3840 Manual - Page 3
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 malfunction and damage. Sectional Door One-Piece Door Tools needed During assembly, installation and adjustment of the opener, instructions will - LiftMaster 3840 | 3840 Manual - Page 4
with the installation of your opener. SECTIONAL DOOR INSTALLATION Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum, door with glass panels, etc.). See page 19 for details. Header Wall FINISHED CEILING Support bracket & fastening hardware is - LiftMaster 3840 | 3840 Manual - Page 5
Inventory Your garage door opener is packaged in two cartons which anything is missing, carefully check the packing material. contain the motor unit and all parts illustrated below. Parts may be stuck in the foam. Hardware for installation Accessories will depend on the model purchased. If - LiftMaster 3840 | 3840 Manual - Page 6
ASSEMBLY STEP 1 Fasten the Rail to the Motor Unit To avoid installation difficulties, do not run the garage door opener until instructed to do so. To aid in assembly and installation, replace the foam packing around the motor unit. Remove it after Installation Step 5. • Working on a level - LiftMaster 3840 | 3840 Manual - Page 7
connect garage door opener to power source until instructed to do so. 8. NEVER wear watches, rings or loose clothing while installing or servicing opener. They could be caught in garage door or opener mechanisms. 9. Install wall-mounted garage door control: • within sight of the garage door. • out - LiftMaster 3840 | 3840 Manual - Page 8
Supports Level (optional) Installation procedures vary according to garage door types. Follow the instructions which apply to your door. 1. Close the door and mark the inside vertical centerline of the garage door to structural supports as shown here and on page 9. 3. Open your door to the highest - LiftMaster 3840 | 3840 Manual - Page 9
above the garage door, or to the ceiling. Follow the instructions which will Support Header Bracket CEILING MOUNT ONLY UP Horizontal Line Vertical Centerline of Garage Door Lag Screws 5/16"-9x1-5/8" Door Spring Highest Point of Garage Door Travel Garage Door Vertical Centerline of Garage Door - LiftMaster 3840 | 3840 Manual - Page 10
holes and join with a clevis pin as shown. • Insert a ring fastener to secure. Garage Door Rail Ring Fastener Header Bracket Clevis Pin 5/16"x2-3/4" Spacers Rail Bracket Rail Opener Carton or Temporary Support HARDWARE SHOWN ACTUAL SIZE Clevis Pin 5/16"x2-3/4" 10 Ring Fastener Spacer - LiftMaster 3840 | 3840 Manual - Page 11
reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. IMPORTANT INFORMATION ABOUT unobstructed. No part of the garage door (or door tracks, springs, hinges, rollers or other hardware) may interrupt the beam while the door is closing. - LiftMaster 3840 | 3840 Manual - Page 12
opener is disconnected. Install and align the brackets so the sensors will face each other across the garage door, with the beam no higher than 6" (15 cm) above the floor. They may be installed in one of three ways, as follows: Garage door 1. If your door track will not support the bracket securely, - LiftMaster 3840 | 3840 Manual - Page 13
fasten sensors to brackets, with lenses pointing toward each other across the door. Be sure the lens is not obstructed by a bracket extension ( NOTE: If your access door is near the garage door, you may choose to install the door control at this time and run the door control wire along the rail - LiftMaster 3840 | 3840 Manual - Page 14
unit. The trolley can remain disconnected until Installation Step 14 is completed. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of door. Top of Door Door 2x4 is used to determine the correct mounting height from ceiling. ENGAGED Trolley Release Arm - LiftMaster 3840 | 3840 Manual - Page 15
the 2x4. Operate the door manually. If the door hits the rail, raise the header bracket. NOTE: DO NOT connect power to opener at this time. To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it SECURELY to structural supports of the garage. Concrete anchors MUST be used - LiftMaster 3840 | 3840 Manual - Page 16
in sight until completely closed. NEVER permit anyone to cross path of closing garage door. opener, it is recommended to use model 378LM wireless door control as the secondary door control. 1. Separate the white and red/white wires. Strip 7/16" HARDWARE SHOWN ACTUAL SIZE (11 mm) of insulation - LiftMaster 3840 | 3840 Manual - Page 17
battery. • Replace battery cover. ALWAYS wear protective gloves and eye protection when changing the battery or working around the battery compartment. Battery Battery procedure to close the lens. • Use A19, standard neck garage door opener bulbs for replacement. NOTE: Use only standard light bulbs. - LiftMaster 3840 | 3840 Manual - Page 18
run the opener at this time. To reduce the risk of electric shock, your garage door opener has a with moving parts. • Reinstall the cover. To avoid installation difficulties, do not run the opener at this glows steadily, tighten the wing nut. TROUBLESHOOTING THE SAFETY REVERSING SENSORS 1. If the - LiftMaster 3840 | 3840 Manual - Page 19
brace. For the vertical brace, 2 pieces of angle iron are used to create a U-shaped support. The best solution is to check with your garage door manufacturer for an opener installation door reinforcement kit. NOTE: Many door reinforcement kits provide for direct attachment of the clevis pin and - LiftMaster 3840 | 3840 Manual - Page 20
Screw 1/4"-14x5/8" Header Wall 2x4 Support Finished Ceiling Header Bracket Door Bracket Optional Placement of Door Bracket Vertical Centerline of Garage Door HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC - LiftMaster 3840 | 3840 Manual - Page 21
Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on the following page. SECTIONAL DOORS ONLY Make sure garage door lock washers and nuts. Pull the emergency release handle toward the opener at a 45° angle so that the trolley release arm is horizontal. - LiftMaster 3840 | 3840 Manual - Page 22
hole overlap). • Make sure the garage door is fully closed. Connect the straight door arm section to the door bracket with the 5/16"x1-1/4" clevis door is being opened or closed from the fully open position (Figure 6). NOTE: Proceed to the following page to Program the Travel Limits. Figure 4 Door - LiftMaster 3840 | 3840 Manual - Page 23
INJURED or KILLED by a closing garage door. • Incorrect adjustment of garage door travel limits will interfere with proper the desired closed position. 7. Push the door control or programmed remote control. This sets the DOWN (close) limit and the door should open. Proceed to Set the Force. Figure - LiftMaster 3840 | 3840 Manual - Page 24
the door control or programmed remote control a third time to close the door (DOWN). The LED will stop flashing when the force has been programmed. The door must travel through a complete cycle, up and down, in order for the force to be set properly. If the garage door opener cannot open and close - LiftMaster 3840 | 3840 Manual - Page 25
Sensors) • Press the remote control push button to open the door. • Place the opener carton in the path of the door. • Press the remote control push button to close the door. The door will not move more than 1" (2.5 cm), and the opener lights will flash. The garage door opener will not close from - LiftMaster 3840 | 3840 Manual - Page 26
PERSONAL INJURY or DEATH from electrocution, disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. 15. SAVE THESE INSTRUCTIONS. Using Your Garage Door Opener Your Security✚® opener and hand-held remote control have been factory-set to a matching code which changes - LiftMaster 3840 | 3840 Manual - Page 27
the light when it detects a person entering the garage. Hour Minute Language Degrees (F/C) LOCK LIGHT Light Button Lock Button (PROG) Learn Feature The door control is equipped with a PROG button to assist in learning remote controls to the opener. Press the PROG button once to - LiftMaster 3840 | 3840 Manual - Page 28
• NEVER use emergency release handle unless garage doorway is clear of persons and obstructions. • NEVER use handle to pull door open or closed. If rope knot becomes untied, you could fall. CARE OF YOUR OPENER MAINTENANCE SCHEDULE Once a Month • Manually operate door. If it is unbalanced or binding - LiftMaster 3840 | 3840 Manual - Page 29
or 3V2450 coin cell batteries. LED and Opener Batteries Proximity Battery Spring Contact CAUTION: Do not bend spring contact. If bent the proximity sensor will not work. Troubleshooting PROBLEM SOLUTION Reduced proximity sensing (does not activate by touching top of remote control) Check if - LiftMaster 3840 | 3840 Manual - Page 30
persons: • Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. • Use ONLY LiftMaster part # 485LM for replacement battery. • DO NOT dispose of battery in fire. Battery may explode. Check with local codes for disposal instructions. ALWAYS wear protective gloves and - LiftMaster 3840 | 3840 Manual - Page 31
force and limit settings is normal. Weather conditions in particular can affect door travel. • Refer to Adjustment Step 1, Program the Travel Limits. 5. My lights will not turn off when door is open: • The garage door opener is equipped with a security light feature. This feature activates the light - LiftMaster 3840 | 3840 Manual - Page 32
reversed. Diagnostics Located On Motor Unit "Learn" Button LED or Diagnostic LED "Learn" Button Installed Safety Reversing Sensor Your garage door opener is programmed with self-diagnostic capabilities. The "Learn" button/diagnostic LED will flash a number of times then pause signifying it has - LiftMaster 3840 | 3840 Manual - Page 33
the Prog button has been pressed on the door control. Pressing the Prog button again will allow the user to program an additional remote control to the opener. Message LEARN MODE. PRESS REMOTE CONTROL BUTTON TO PROGRAM REMOTE. Meaning: This message will appear when the Prog - LiftMaster 3840 | 3840 Manual - Page 34
that technical measure. Your garage door opener has already been programmed at the factory to operate with your hand-held remote control. The door will open and close when you press the large push button. Below are instructions for programming your opener to operate with additional Security - LiftMaster 3840 | 3840 Manual - Page 35
Your new Keyless Entry must be programmed to operate your garage door opener. USING THE "LEARN" BUTTON service people with a temporary 4-digit PIN. After a programmed number of hours or number of accesses, this temporary PIN expires and will no longer open the door. It can be used to close the door - LiftMaster 3840 | 3840 Manual - Page 36
Wire Clips LOCK LIGHT 13 KEY PART NO. NO. 1 398LM DESCRIPTION Smart Control Panel® 2 373P 3-Button remote control 3 10A19 3V2016 Lithium battery: LED and opener 7 6 4 10A33 8 5 29C151 3V2450 Lithium battery: proximity switch Remote control visor clip 6 41A2828 Emergency release - LiftMaster 3840 | 3840 Manual - Page 37
position sensor Positioning sensor Drive belt Logic board KEY NO. 9 10 11 12 13 14 PART NO. 41A6231 41C213 31D504-20 41C22-1 108D79 175B88 485LM 41DS002-2-390 DESCRIPTION End panel Transformer and Harness Cover Drive coupling hub Light lens Light socket NOT SHOWN Battery kit Alternate frequency - LiftMaster 3840 | 3840 Manual - Page 38
appliance from their car with their garage door opener remote or from anywhere in their home with an additional LiftMaster Security✚® remote. 378LM LOCK LIGHT Garage Door Monitor Sensor: Additional accessory sensor for homes with multiple garage doors. Laser Park Assist: Laser enables homeowners - LiftMaster 3840 | 3840 Manual - Page 39
NOTES 39 - LiftMaster 3840 | 3840 Manual - Page 40
ALWAYS GIVE THE FOLLOWING INFORMATION: • PART NUMBER • PART NAME • MODEL NUMBER ADDRESS ORDERS TO: THE CHAMBERLAIN GROUP, INC. Technical Support Group 6050 S. Country Club Road Tucson, Arizona 85706 SERVICE INFORMATION TOLL FREE NUMBER: 1-800-528-9131 LIFTMASTER® FIVE-YEAR LIMITED WARRANTY LIFETIME
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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.LiftMaster.com
GARAGE DOOR OPENER
Model 3840
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.
■
The model number label is located under the light lens on the left side panel
of your opener.
®
For Residential Use Only
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