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Chamberlain 3255 User Manual

Chamberlain 3255
36 pages
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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
GARAGE DOOR OPENER
Models 3245 1/3 HP
3255 1/2 HP
3255-2 1/2 HP
For Residential Use Only
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 on the front panel of your opener.
®
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Chamberlain 3255 Specifications

General IconGeneral
Horsepower1/2 HP
Drive SystemChain Drive
Voltage120V
Safety and SecurityRolling Code Technology
Battery BackupNo

Summary

Preparing Your Garage Door

Tools Needed for Installation

Lists necessary hand tools for assembly and installation of the garage door opener.

Planning for Garage Door Opener Installation

Carton Inventory and Hardware List

Installation Hardware Components

Lists all hardware components included in the installation hardware bag.

Assembly Step 1: Attach Rail to Motor Unit

Assembly Step 2: Attach Chain to Sprocket

Assembly Step 3: Tighten the Chain

Critical Installation Safety Guidelines

Important Installation Instructions

Crucial safety guidelines and instructions before starting installation.

Installation Step 1: Determine Header Bracket Location

Installation Step 2: Install the Header Bracket

Wall Header Bracket Installation

Instructions for mounting the header bracket on the wall structure.

Ceiling Header Bracket Installation

Instructions for mounting the header bracket on the ceiling structure.

Installation Step 3: Attach Rail to Header Bracket

Installation Step 4: Position the Opener

Sectional or One-Piece Door with Track

Specific positioning steps for sectional or track-equipped doors.

One-Piece Door Without Track

Specific positioning steps for one-piece doors without a track.

Installation Step 5: Hang the Opener

Installation Step 6: Install the Door Control

Installation Step 7: Install the Light

Installation Step 8: Attach Emergency Release Rope

Installation Step 9: Electrical Requirements

Permanent Wiring Connection

Details for making a permanent electrical connection to the opener.

Installation Step 10: Install The Protector System®

Important Information on Safety Reversing Sensors

Key information regarding the safety reversing sensor installation and function.

Installing Sensor Brackets

Bracket Mounting Methods

Details bracket installation for track, wall, and floor mounting.

Sensor Mounting, Wiring, and Alignment

Covers sensor mounting, wiring, and alignment procedures.

Common Sensor Alignment Issues

Addresses common problems encountered during safety sensor alignment.

Safety Reversing Sensor Troubleshooting Guide

Troubleshooting Sensor Errors

Provides solutions for common safety sensor errors and malfunctions.

Aligning Safety Reversing Sensors Correctly

Detailed steps for correctly aligning the safety reversing sensors.

Installation Step 11: Fasten the Door Bracket

Sectional Doors Bracket Fastening

Specific instructions for fastening the door bracket on sectional doors.

One-Piece Doors Bracket Fastening

Specific instructions for fastening the door bracket on one-piece doors.

One-Piece Door Bracket Fastening Details

Metal Doors Bracket Fastening

Instructions for fastening the door bracket on metal doors.

Wood Doors Bracket Fastening

Instructions for fastening the door bracket on wood doors.

Installation Step 12: Connect Door Arm to Trolley

Sectional Doors Connection

Specific steps for connecting the door arm to the trolley on sectional doors.

All One-Piece Doors: Door Arm Assembly & Adjustment

Door Arm Assembly

Steps to assemble the door arm for one-piece doors.

Travel Limit Adjustment Procedures

Procedures for adjusting travel limits for one-piece doors before connecting arm.

Adjustment Step 1: Adjust Up and Down Travel Limits

How and When to Adjust Limits

Guidance on adjusting travel limits based on door travel behavior.

Adjustment Step 2: Adjust the Force

How and When to Adjust Forces

Guidance on adjusting UP and DOWN force settings based on door behavior.

Adjustment Step 3: Test Safety Reversal System

Adjustment Step 4: Test Protector System®

Operation Overview

Important Safety Instructions

Critical safety instructions for operating the garage door opener.

Using Your Garage Door Opener

How to operate the opener with remote, wall control, and sensor behavior.

Using the Wall-Mounted Door Control

Multi-Function Door Control Features

Details on the functions of the multi-function door control, including light and lock features.

Opening the Door Manually

Care of Your Opener

Limit and Force Adjustments

Guidance on adjusting limits and force settings due to weather or operation.

Maintenance Schedule

Recommended maintenance tasks for the opener, including monthly, twice-yearly, and yearly checks.

Remote Control Battery Replacement

Troubleshooting Common Problems

Door Not Closing / Blinking Lights

Troubleshooting steps for the door not closing with blinking lights.

Remotes Not Activating Door

Troubleshooting steps when remotes fail to activate the opener.

Door Reverses Unexpectedly

Troubleshooting steps for unexpected door reversals during operation.

Door Reverses After Fully Closing

Troubleshooting steps for door reversals after reaching the fully closed position.

Lights Do Not Turn Off

Explains the security light feature and how it functions.

Motor Unit Hums Briefly

Troubleshooting steps for a motor unit that hums briefly.

Diagnostic Chart

Safety Sensor Errors (1-2 Flashes)

Diagnoses issues related to safety reversing sensors being open, disconnected, or wired incorrectly.

Door Control Errors (3 Flashes)

Diagnoses issues related to door control or wire shorts.

Sensor Alignment Errors (4 Flashes)

Diagnoses issues related to misaligned or dim safety reversing sensors.

Motor Overheat/RPM Sensor Errors (5 Flashes)

Diagnoses issues related to motor overheating or RPM sensor failure.

Motor Circuit/Logic Board Errors (6 Flashes)

Diagnoses issues related to motor circuit failure or logic board issues.

Programming Your Opener

Add or Reprogram Remote Controls

Instructions for programming remote controls to the garage door opener.

Erase All Codes From Memory

Steps to erase all previously programmed remote control codes.

3-Button Remote Programming

Information on programming additional buttons on 3-button remotes.

Keyless Entry PIN Management

Change Existing Keyless Entry PIN

Procedure to change the existing PIN for Keyless Entry.

Set Temporary Keyless Entry PIN

Procedure to set up a temporary PIN for visitors or service personnel.

Repair Parts: Rail and Installation

Rail Assembly Parts

Lists and illustrates parts for the rail assembly.

Installation Parts List

Lists and illustrates common installation components.

Motor Unit Assembly Parts

Available Accessories

Service and Support Information

LiftMaster Limited Warranty

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