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Security + 3800 - User Manual

Security + 3800
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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
®
and cable tension monitor are
connected and properly aligned.
■ Periodic checks of the opener are required to ensure safe operation.
■ The model number label is located behind the hinged door of your opener.
GARAGE DOOR OPENER
Model 3800
For Residential Sectional Doors With
Torsion Assemblies Only
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
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Table of Contents

Questions and Answers

  • B
    Betty ColeAug 18, 2025
    How to troubleshoot Security + Garage Door Opener when it doesn't operate from the Control Console or remote?
    • L
      Lori DavisAug 18, 2025
      If your Security + Garage Door Opener doesn't operate from either the Control Console or the remote control, first, ensure the opener has electric power by plugging a lamp into the outlet. If the lamp doesn't light, check the fuse box or circuit breaker. Also, make sure all door locks are disabled and that there is no ice or snow under the door, potentially freezing it to the ground. Finally, the garage door spring may be broken and need replacement.
  • M
    matthew34Aug 21, 2025
    Why does my Security + Garage Door Opener open and close by itself?
    • M
      Marcus TaylorAug 21, 2025
      If your Security + Garage Door opens and closes by itself, ensure that all remote control push buttons are off. If the issue persists, remove the bell wire from the door control terminals and operate the opener using only the remote. If this resolves the problem, the door control is likely faulty and needs replacement, or there may be an intermittent short on the wire between the control console and the motor unit. Additionally, clear the memory and reprogram all remote controls.
  • B
    Brent LopezAug 23, 2025
    Why Security + 3800 works from remote but not control console?
    • F
      fowleraustinAug 23, 2025
      If your Security + Garage Door Opener operates from the remote but not from the Control Console, first check if the control console is lit. If not, reverse the wires. If the opener then works, inspect for a faulty wire connection at the control console, a short under the staples, or a broken wire.
  • W
    watsonmichaelAug 26, 2025
    What to do if Security + Garage Door doesn't open completely?
    • P
      Peggy DelacruzAug 26, 2025
      If your Security + Garage Door doesn't open completely, check the power door lock. Also, inspect for any obstructions blocking the door's path. The door might also be out of balance, or the springs could be broken. Remove any obstructions and repair the door if necessary.
  • K
    Kathryn CarsonAug 28, 2025
    What to do if Security + Garage Door opens but won't close?
    • N
      Nicholas BrownAug 28, 2025
      If your Security + Garage Door opens but won't close, check the cable tension monitor. Also, if the opener lights are blinking, check the safety reversing sensors.
  • A
    Austin WilsonAug 31, 2025
    Why Security + Garage Door reverses for no apparent reason and lights don’t blink?
    • S
      Sherry HodgesAug 31, 2025
      If your Security + Garage Door reverses for no apparent reason and the opener lights don't blink, check the cable tension monitor. Inspect for any obstructions blocking the door. Pull the emergency release handle and operate the door manually. If it is unbalanced or binding, call a trained door systems technician. Clear any ice or snow from the garage floor area where the door closes. Repeat the safety reverse test after adjustments.
  • S
    Sergio IrwinSep 2, 2025
    Why Security + Garage Door reverses and opener lights blink for 5 seconds?
    • W
      wthompsonSep 2, 2025
      If your Security + Garage Door reverses for no apparent reason and the opener lights blink for 5 seconds after reversing, check the safety reversing sensor. Remove any obstruction or align the receiving eye.
  • S
    sandra42Sep 4, 2025
    Why Security + 3800 Garage Door Opener strains when operating?
    • G
      Gregory WilliamsSep 4, 2025
      If your Security + Garage Door Opener strains to operate the door, the door may be out of balance, or the springs may be broken. Close the door and use the emergency release handle to disconnect the door. Open and close the door manually. A properly balanced door will stay in any point of travel while being supported entirely by its springs. If it does not, disconnect the opener and call a trained door systems technician.
  • J
    Jody BakerSep 7, 2025
    Why Security + 3800 motor hums but won't work?
    • C
      Crystal DavisSep 7, 2025
      If the Security + Garage Door Opener motor hums briefly but won't work, the garage door springs may be broken. If the problem occurs on the first operation, the door may be locked; disable the power door lock.
  • A
    anthonysteeleSep 10, 2025
    What to do if Security + 3800 Garage Door Opener won't operate due to power failure?
    • A
      Anthony MartinezSep 10, 2025
      If your Security + Garage Door Opener won't operate due to a power failure, manually open the power door lock. Use the emergency release handle to disconnect the door, allowing it to be opened and closed manually. When power is restored, pull the manual release a second time. If a Battery Backup Unit is connected, the opener should operate up to 20 times without power.

Summary

Introduction

Safety Symbol Review and Signal Word Review

Review of safety symbols and signal words used in the manual.

Planning

Preparing Your Garage Door

Tools Needed

List of tools required for opener installation and adjustment.

Carton Inventory

Hardware Inventory

List of hardware components included in the installation package.

Assembly

Attach the Collar to the Motor Unit

Instructions for attaching the collar to the motor unit for installation.

Attach Mounting Bracket to Motor Unit

Steps to attach the mounting bracket to the motor unit before installation.

Installation

IMPORTANT INSTALLATION INSTRUCTIONS

Critical safety warnings and instructions for the garage door opener installation.

Position the Opener

Guidance on selecting the correct position for mounting the garage door opener unit.

Attach the Emergency Release Rope and Handle

Procedure for attaching the emergency release rope and handle to the opener.

Install Power Door Lock

Steps for installing the power door lock to secure the garage door.

Attach the Cable Tension Monitor (Required)

Instructions for attaching the essential cable tension monitor device.

Install the Control Console

Guide for mounting and wiring the wall-mounted control console.

Install Remote Light

Steps for installing the remote work light accessory for the opener.

Electrical Requirements

Details on electrical connections and requirements for the garage door opener.

Mount the Battery Backup Unit (BBU)

Instructions for mounting the optional battery backup unit for power outages.

Install The Protector System

Guide for installing the safety reversing sensor system.

IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR

Key information regarding the function and installation of the safety reversing sensor.

Installing the Brackets

Details on how to install the mounting brackets for the safety reversing sensors.

Mounting and Wiring the Safety Reversing Sensors

Steps for mounting and wiring the safety reversing sensors to the opener.

Aligning the Safety Reversing Sensors

Procedure for aligning the safety reversing sensors for proper operation.

Troubleshooting the Safety Reversing Sensors

Common issues and solutions for the safety reversing sensors.

Adjustment

Program the Travel Limits

How to set the upper and lower limits for the garage door travel.

Setting the Force

Procedure for adjusting the force settings for opening and closing the garage door.

Test the Safety Reversal System

How to perform the safety reversal system test with an obstruction.

Test The Protector System

Testing the functionality of the safety reversing sensor system.

Test Cable Tension Monitor

Testing the cable tension monitor for proper function.

Test Power Door Lock

Verifying the operation of the power door lock mechanism.

To Open the Door Manually

Steps for manually disengaging and operating the garage door.

Operation

IMPORTANT SAFETY INSTRUCTIONS

Crucial safety guidelines for operating the garage door opener.

Using Your Garage Door Opener

How to activate and use the garage door opener with various controls.

Using the Wall-Mounted Control Console

Detailed explanation of the LCD motion detecting control console features.

Care of Your Opener

Maintenance Schedule

Recommended maintenance tasks for the garage door opener, monthly and yearly.

The Remote Control Battery

Information on replacing the battery in the remote control transmitter.

Having a Problem? (Troubleshooting)

Section addressing common problems and their solutions for the opener.

Having a Problem? (Continued)

Further troubleshooting guidance for issues not covered in the initial section.

Diagnostic Chart

A chart detailing diagnostic codes indicated by the opener's LED flashes.

Programming

To Add or Reprogram a Hand-held Remote Control

Instructions for programming remote controls to the garage door opener.

To Erase All Codes From Motor Unit Memory

Procedure to clear all previously programmed remote control codes.

To Add, Reprogram or Change a Keyless Entry PIN

Steps for programming or changing the PIN for the keyless entry system.

Reprogramming Light or Additional Light

How to program remote work lights or additional lights to operate with the opener.

Repair Parts

Installation Parts

List of replacement parts specifically for the installation process.

Motor Unit Assembly Parts

Diagram and list of components within the motor unit assembly.

Accessories

LiftMaster Service is On Call

How to Order Repair Parts

LiftMaster Garage Door Opener Five-Year Limited Warranty

Security + 3800 Specifications

General IconGeneral
BrandSecurity +
Model3800
CategoryGarage Door Opener
LanguageEnglish

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