Chamberlain AccessMaster M8856 User Manual

CONTENTS
Preparation . . . . . . . . . . . . . . . .1-2
Assembly . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . 4-11
Install the Door Control. . . . . . 12-13
Install the Protector System
®
. . 14-17
Power. . . . . . . . . . . . . . . . . . 18-19
Adjustments . . . . . . . . . . . . . 20-22
Operation . . . . . . . . . . . . . . . . . 23
Features . . . . . . . . . . . . . . . . . . 24
Door Control . . . . . . . . . . . . . 25-26
Remote Control . . . . . . . . . . . . . 27
To Erase the Memory . . . . . . . . . 27
To Open the Door Manually . . . . . 28
Maintenance . . . . . . . . . . . . . . . 29
Troubleshooting. . . . . . . . . . . 30-31
Accessories. . . . . . . . . . . . . . . . 32
Warranty. . . . . . . . . . . . . . . . . . 33
Repair Parts . . . . . . . . . . . . . 34-35
1/2 hp
Garage Door Opener
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
■ 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 garage door opener are required to ensure safe operation.
■ The model number label is located on the front panel of your garage door opener.
■ This garage door opener is ONLY compatible with MyQ
®
and Security✚ 2.0™
accessories.
■ ONLY enable the Timer-to-Close or MyQ
®
remote operation feature when the
garage door opener is installed on a sectional door.
NOTE: If you are installing the garage door opener on a one-piece door, visit
www.liftmaster.com for installation instructions.
www.liftmaster.com
Serial Number:
Date of Purchase:
Models
• M885
• M8856
FOR RESIDENTIAL USE ONLY
Write down the following information for
future reference:
.
.

Chamberlain AccessMaster M8856 Specifications

General

Type	Chain Drive
Horsepower	1/2 HP
Max Door Weight	500 lbs
Battery Backup	No
Lift Capacity	500 lbs
Max Door Height	7 feet
Remote Control	Yes
Voltage	120V

Summary

Preparation

Installation

Determine the Header Bracket Location

Guidance on selecting and marking the optimal location for the header bracket installation.

Install the Header Bracket

Instructions for securely mounting the header bracket to either the wall or ceiling.

Hang the Garage Door Opener

Instructions for securely hanging the garage door opener motor unit using appropriate brackets and hardware.

Install the Door Bracket

Connect the Door Arm to the Trolley

Install the Door Control

Install the Door Control

Wire the Door Control to the Garage Door Opener

Guide for running wires from the door control to the opener and making connections.

Install the Protector System®

Install the Safety Reversing Sensors

Detailed instructions for mounting the safety reversing sensors on either side of the garage door.

Wire the Safety Reversing Sensors

Procedures for wiring the safety reversing sensors to the garage door opener unit.

Pre-wired Installation

Power

Connect Power

Options for connecting the garage door opener to a power source, either typical or permanent wiring.

Ensure the Safety Reversing Sensors are Aligned

Checks and alignment procedures for safety reversing sensors to ensure proper operation.

Ensure the Door Control is Wired Correctly

Adjustments

Program the Travel

Step-by-step guide to setting the open and close travel limits for the garage door opener.

Test the Safety Reversal System

Procedures for testing the safety reversal system by checking door reversal on obstruction.

Test the Protector System®

Testing the safety reversing sensor system to ensure it prevents door closure with obstructions.

Door Control

Control Panel Setup

Remote Control

Program Using the Garage Door Opener

Maintenance

Troubleshooting

Diagnostic Chart

A chart detailing diagnostic codes, symptoms, and solutions for common opener issues.