Chamberlain GA400D User Manual

Introduction 2

When you see these Safety Symbols and Signal Words on 
the following pages, they will alert you to the possibility of 
serious injury or death if you do not comply with the 
warnings that accompany them. The hazard may come 
from something mechanical or from electric shock. Read 
the warnings carefully.

When you see this Signal Word on the following pages, it 
will alert you to the possibility of damage to your gate and/
or the gate operator if you do not comply with the 
cautionary statements that accompany it. Read them 
carefully.

This gate operator has been designed and tested to offer safe service provided it is installed, operated, maintained and 
tested in strict accordance with the instructions and warnings contained in this manual.

Safety Symbol and Signal Word Review

Operator Specifications

Safety Installation Information

Carton Inventory

Hardware Inventory

Additional Items for Purchase

Tools Needed

Single Gate Overview

Dual Gate Overview

Check Your Gate

Gate Travel

Mounting Options

Attach Operator to Gate

Mount the Control Box

Connect Gate Operator (Gate 1) to Control Box

Connect Gate Operator (Gate 2) to Control Box 

 

(Model GA420D Only)

Connect Indoor Transformer to Low Voltage Wire 
and Battery

Program Limits

Force/Timer To Close/Party Mode Controls

To Add or Reprogram a Remote Control

To Add a Wireless Keyless Entry

To Erase All Codes

Important Safety Information

Using Your Gate Operator

Manual Release

Maintenance

Wiring Diagram

Diagnostic Chart

Troubleshooting

Repair Parts