Chamberlain 3850 User Manual

31
Having a Problem (Troubleshooting)
NOTE: Always unplug battery prior to troubleshooting.
1. My door will not close and the light bulbs blink on my motor
unit: The safety reversing sensor must be connected and
aligned correctly before the garage door opener will move in the
down direction.
• Verify the safety reversing sensors are properly installed,
aligned and free of any obstructions. Refer to Installation
Step 10: Install The Protector System
®
.
• Check diagnostic LED for flashes on the motor unit then refer
to the Diagnostic Chart on the following page.
2. My remotes will not activate the door:
• Verify your Smart Control Panel
®
does not display “Lock
Mode.” If it does, deactivate the Lock Mode following the
instructions for Using the Door Control.
• Reprogram remotes following the programming instructions.
Refer to Programming.
• If remote will still not activate your door, check diagnostic
LED for flashes on motor unit then refer to Diagnostic Chart
on the following page.
3. My door reverses for no apparent reason: Repeat safety reverse
test after adjustments to force or travel limits. The need for
occasional adjustment for the force and limit settings is normal.
Weather conditions in particular can affect door travel.
• Manually check door for balance or any binding problems.
• Refer to Adjustment Step 2, Setting the force.
4. My door reverses for no apparent reason after fully closing
and touching the floor: Repeat safety reverse test after
adjustments to force or travel limits. The need for occasional
adjustment for the force and limit settings is normal. Weather
conditions in particular can affect door travel.
• Refer to Adjustment Step 1, Program the Travel Limits.
Decrease down travel.
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 on when the safety
reversing sensor beam has been obstructed. Refer to
Operation section; Using the Wall-Mounted Door Control,
Light Feature.
6. My motor unit hums briefly:
• First verify that the trolley is against the stop bolt.
• Release the door from the opener by pulling the Emergency
Release Rope.
• Manually bring the door to a closed position.
• Loosen the belt by adjusting the outer nut 4 to 5 turns. This
relieves the tension.
Bell Wire
Safety Reversing Sensor
Diagnostics
Located On
Motor Unit
“Learn”
Button
LED or
Diagnostic
LED
Receiving Eye
Safety Reversing Sensor
(Green Indicator Light)
Sending Eye Safety
Reversing Sensor
(Amber Indicator Light)
• Run the motor unit from the remote control or door control.
The trolley should travel towards the door and stop. If the
trolley re-engages with the door, pull the Emergency Release
Rope to disengage.
• Re-Tighten the outer nut until the trolley spring is
approximately 1-1/4" (3.18 cm) in length.
• If the trolley does not move away from the bolt, repeat the
steps above.
7. If battery status LED is not lit properly:
• Check battery connections.
8. My garage door opener beeps:
• A solid LED with beep, sounding approximately every 2
seconds, indicates the motor unit is activating the door and
is operating off of the battery.
• A flashing LED with beep, sounding every 30 seconds,
indicates battery is low.
• If a red LED remains on when the power is restored, and is
accompanied by a beep sounding every 30 seconds, replace
the battery.
Trolley
1-1/4"
(3.18 cm)

Chamberlain 3850 Specifications

General

Type	Chain Drive
Horsepower	1/2 HP
Battery Backup	No
Voltage	120V
Lighting	Yes
Keyless Entry	Yes
Warranty	Lifetime motor warranty

Summary

Introduction

Safety Symbol and Signal Word Review

Explains the meaning of warning and caution symbols used in the manual.

Preparing Your Garage Door

Critical Safety Warnings

Details severe injury/death risks during installation if door is unbalanced or locks are not disabled.

Damage Prevention Cautions

Warns about disabling locks and using correct voltage to prevent opener damage.

Assembly Step 1: Rail to Motor Unit

Caution: Prevent Opener Damage

Warns against using incorrect bolts during rail attachment to prevent opener damage.

Assembly Step 2: Set Belt Tension

Assembly Step 3: Attach Belt Cap Retainer

Warning: Prevent Finger Injury

Advises keeping hands clear of the belt pulley and securing the cover to prevent finger injury.

Important Installation Instructions

General Installation Safety

Lists crucial safety warnings and instructions for a safe garage door opener installation.

Installation Step 1: Header Bracket Location

Warning: Prevent Serious Injury or Death

Emphasizes rigid fastening of the header bracket to avoid door reversal issues and injury.

Installation Step 2: Install Header Bracket

Installation Step 3: Attach Rail to Header Bracket

Installation Step 4: Position Opener

Caution: Prevent Garage Door Damage

Instructs to rest the opener rail on a 2x4 for correct height to prevent garage door damage.

Installation Step 5: Hang the Opener

Warning: Prevent Falling Opener Injury

Stresses securely fastening the opener to structural supports to prevent it from falling.

Installation Step 6: Install Smart Control Panel

Caution: Prevent LCD Damage

Warns about potential damage to the LCD screen from extreme cold temperatures.

Warning: Prevent Electrocution Risk

Advises disconnecting power before installing the door control for safety.

Warning: Prevent Closing Door Injury

Outlines safety measures for installing the door control to prevent injury from a closing door.

Installation Step 7: Install EverCharge Standby Power System

Caution: Wear Protective Gear

Recommends wearing protective gear when handling the battery.

Installation Step 8: Install Lights

Caution: Prevent Overheating of Lights

Warns against using incorrect bulb types or wattages to prevent overheating.

Installation Step 9: Attach Emergency Release Rope and Handle

Warning: Prevent Falling Door Injury

Details safety precautions when using the emergency release handle, especially with unbalanced doors.

Installation Step 10: Electrical Requirements

Warning: Prevent Electrocution and Fire Risk

Emphasizes disconnecting power before work and adhering to electrical codes.

Installation Step 11: Install Protector System

Safety Reversing Sensor Information

Explains how the safety reversing sensor works and its detection capabilities.

Warning: Power Off Before Sensor Install

Advises ensuring power is off before installing the safety reversing sensor.

Warning: Prevent Closing Door Injury (Sensor)

Stresses correct connection and alignment of the safety sensor and its mandatory use.

Installing Safety Reversing Sensor Brackets

Mounting and Wiring Safety Reversing Sensors

Aligning Safety Reversing Sensors

Details the procedure for aligning the safety reversing sensors for proper operation.

Troubleshooting Safety Reversing Sensors

Provides solutions for common issues with the safety reversing sensors.

Installation Step 12: Fasten Door Bracket

Warning: Lightweight Door Reinforcement

Warns that lightweight doors need reinforcement before bracket installation.

Installation Step 13: Connect Door Arm to Trolley

Adjustment Step 1: Program Travel Limits

Warning: Safety Reversal System Importance

Warns about serious injury risk from closing doors if the safety reversal system is not properly installed.

Caution: Vehicle Clearance

Advises ensuring the fully open door provides adequate clearance for vehicles.

Setting the UP Travel Limit

Setting the DOWN Travel Limit

Adjustment Step 2: Set the Force

Warning: Safety System Testing Required

Reiterates serious injury risk if the safety reversal system is not properly installed or tested.

Adjustment Step 3: Test Safety Reversal System

Safety Reversal System Test Procedure

Details the procedure for testing the safety reversal system using an obstruction.

Adjusting for Safety Reversal Test Failure

Critical Safety Checks After Adjustments

Lists circumstances that require re-testing the safety reverse system.

Warning: Regular Safety System Testing

Reinforces the importance of testing the safety reversal system regularly.

Adjustment Step 4: Test Protector System

Warning: Sensor System Safety

Warns about serious injury risks if the safety reversing sensor is not properly installed or tested.

Operation

Important Safety Instructions for Operation

Lists crucial safety warnings and instructions for operating the garage door opener.

Using Your Garage Door Opener

Explains how to operate the opener using various controls like remotes and wall controls.

Using the Wall-Mounted Door Control

Smart Control Panel Features

Using the Remote Control

Remote Control Troubleshooting

Lists common problems with remote controls and their solutions.

EverCharge Standby Power System

Operating Instructions for Standby Power

Provides instructions for testing and charging the optional EverCharge standby power system.

Warning: Battery Fire and Injury Risk

Warns about fire and injury risks associated with the battery, advising proper handling and replacement.

Caution: Battery Handling Safety

Recommends wearing protective gear when working with the battery compartment.

Manually Opening the Garage Door

Warning: Manual Operation Safety

Warns about injury risks from falling doors when using the manual release, especially with unbalanced doors.

Troubleshooting Common Problems

Door Won't Close / Lights Blink

Remotes Not Activating Opener

Door Reverses Unexpectedly

Door Reverses After Closing

Motor Unit Hums Briefly

Battery Status LED Issues

Opener Beeping Indicators

Diagnostic Chart for Opener Issues

1 Flash: Sensor Wire Open/Disconnected

2 Flashes: Sensor Wire Shorted/Reversed

3 Flashes: Door Control Wire Shorted

4 Flashes: Safety Sensors Misaligned

5 Flashes: Motor RPM Not Recognized

Smart Control Panel Messages

Safety Sensor Check Message

Safety Sensor Malfunction Message

Battery Replacement Required Message

Programming Your Opener

Add or Reprogram Hand-held Remote

Erase All Remote Codes

Keyless Entry PIN Programming

Change Existing Keyless Entry PIN

Set Temporary Keyless Entry PIN