Chamberlain AccessMaster User manual

The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
Contents
Important Safety Instructions ......... 2-3
Operation....................................4
Using the Door Control....................5
Programming - Door Control Panel .....6
Programming - Remote Controls ........7
To Erase the Memory......................7
To Open the Door Manually ..............8
Adjustment..................................9
Program the Travel ...................... 10
Test the Safety Reversal System ...... 11
Test the Protector System ®............ 11
Maintenance.............................. 12
Troubleshooting...................... 13-14
Repair Parts .............................. 15
Warranty .................................. 16
CONTRACTOR Series
Garage Door Opener
■ Please read this guide and the enclosed safety materials carefully!
■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.
■This garage door opener is ONLY compatible with Security✚2.0™ accessories.
■DO NOT enable the Timer-to-Close feature if you are installing the garage
door opener on a one-piece door. The Timer-to-Close is to be used ONLY with
sectional doors.
■Attach enclosed warning labels to the location indicated on label.
Serial Number:
Date of Purchase:
User’s Guide
FOR RESIDENTIAL USE ONLY
Write down the following information
for future reference:
The images throughout this manual are for reference and your product may look different.
CONTACT INFORMATION
Leave this User’s Guide with the homeowner.
.
.

2
Safety Symbol and Signal
Word Review
This garage door opener 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.
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.
Mechanical
Electrical
When you see this Signal Word on the
following pages, it will alert you to the
possibility of damage to your garage door
and/or the garage door opener if you do not
comply with the cautionary statements that
accompany it. Read them carefully.
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNINGWARNING
1. READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS.
2. Install garage door opener ONLY on properly balanced and
lubricated garage door. An improperly balanced door may
NOT reverse when required and could result in SEVERE
INJURY or DEATH.
3. ALL repairs to cables, spring assemblies and other hardware
MUST be made by a trained door systems technician
BEFORE installing opener.
4. Disable ALL locks and remove ALL ropes connected
to garage door BEFORE installing opener to avoid
entanglement.
5. Install garage door opener 7 feet (2.13 m) or more above
floor.
6. Mount the emergency release within reach, but at least 6 feet
(1.83 m) above the floor and avoiding contact with vehicles
to avoid accidental release.
7. NEVER connect garage door opener to power source until
instructed to do so.
8. NEVER wear watches, rings or loose clothing while installing
or servicing opener. They could be caught in garage door or
opener mechanisms.
9. Install wall-mounted garage door control:
• within sight of the garage door.
• out of reach of children at minimum height of 5 feet (1.5 m).
• away from ALL moving parts of the door.
10. Place entrapment warning label on wall next to garage door
control.
11. Place manual release/safety reverse test label in plain view on
inside of garage door.
12. Upon completion of installation, test safety reversal system.
Door MUST reverse on contact with a 1-1/2" (3.8 cm) high
object (or a 2x4 laid flat) on the floor.
13. To avoid SERIOUS PERSONAL INJURY or DEATH from
electrocution, disconnect ALL electric and battery power
BEFORE performing ANY service or maintenance.
14. DO NOT enable the Timer-to-Close functionality if operating
either one-piece or swinging garage doors. To be enabled
ONLY when operating a sectional door.
15.
SAVE THESE
INSTRUCTIONS.
Important Safety Instructions
NOTE: For complete installation instructions visit www.liftmaster.com to print the entire owner’s manual.

3
IMPORTANT SAFETY INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNINGWARNING
1. READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS.
2. ALWAYS keep remote controls out of reach of children.
NEVER permit children to operate or play with garage door
control push buttons or remote controls.
3. ONLY activate garage door when it can be seen clearly, it
is properly adjusted, and there are no obstructions to door
travel.
4. ALWAYS keep garage door in sight and away from people
and objects until completely closed. NO ONE SHOULD
CROSS THE PATH OF THE MOVING DOOR.
5. NO ONE SHOULD GO UNDER A STOPPED, PARTIALLY
OPENED DOOR.
6. If possible, use emergency release handle to disengage
trolley ONLY when garage door is CLOSED. Use caution
when using this release with the door open. Weak or broken
springs or unbalanced door could result in an open door
falling rapidly and/or unexpectedly and increasing the risk of
SEVERE INJURY or DEATH.
7. NEVER use emergency release handle unless garage
doorway is clear of persons and obstructions.
8. NEVER use handle to pull garage door open or closed. If
rope knot becomes untied, you could fall.
9. After ANY adjustments are made, the safety reversal system
MUST be tested.
10. Safety reversal system MUST be tested every month. Garage
door MUST reverse on contact with 1-1/2" high (3.8 cm)
object (or a 2x4 laid flat) on the floor. Failure to adjust the
garage door opener properly increases the risk of SEVERE
INJURY or DEATH.
11. ALWAYS KEEP GARAGE DOOR PROPERLY BALANCED. An
improperly balanced door may NOT reverse when required
and could result in SEVERE INJURY or DEATH.
12. ALL repairs to cables, spring assemblies and other hardware,
ALL of which are under EXTREME tension, MUST be made by
a trained door systems technician.
13. ALWAYS disconnect electric power to garage door opener
BEFORE making ANY repairs or removing covers.
14. This operator system is equipped with an unattended
operation feature. The door could move unexpectedly. NO
ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.
15. DO NOT enable the Timer-to-Close functionality if operating
either one-piece or swinging garage doors. To be enabled
ONLY when operating a sectional door.
16.
SAVE THESE
INSTRUCTIONS.
Important Safety Instructions

4
Your garage door opener is equipped with features to provide you with greater control over
your garage door operation.
ALERT2CLOSE
The Alert2Close feature provides a visual and an audible alert that an unattended door
is closing.
TIMER-TO-CLOSE (TTC)
The TTC feature automatically closes the door after a specified time period that can be
adjusted using a TTC enabled door control (Models 881LM or 880LM). Prior to and during
the door closing the garage door opener lights will flash and the garage door opener will
beep.
MyQ®
MyQ®technology uses a 900MHz signal to provide two-way communication between the
garage door opener and MyQ®enabled accessories. Your garage door opener is compatible
with up to 16 MyQ®accessories.
SECURITY✚2.0™ REMOTE CONTROLS AND DOOR CONTROLS
Your garage door opener has already been programmed at the factory to operate with your
remote control, which changes with each use, randomly accessing over 100 billion new
codes. Compatible with Security+ 2.0™ accessories.
NOTE: Older LiftMaster remote controls, door controls, and third party products are not
compatible.
Security✚ 2.0™
Accessories MEMORY CAPACITY
Remote
Controls
Up to 12
Door Controls Up to 2 Smart Control Panels or 4 of any other Security+2.0™ door
controls
Keyless Entries Up to 1
THE PROTECTOR SYSTEM®(SAFETY REVERSING SENSORS)
When properly connected and aligned, the safety reversing sensors will detect an obstruction
in the path of the infrared beam. If an obstruction breaks the infrared beam while the door is
closing, the door will stop and reverse to full open position, and the opener lights will flash
10 times. If the door is fully open, and the safety reversing sensors are not installed, or are
misaligned, the door will not close from a remote control. However, you can close the door
if you hold the button on the door control or keyless entry until the door is fully closed. The
safety reversing sensors do not affect the opening cycle.
ENERGY CONSERVATION
For energy efficiency the garage door opener will enter sleep mode when the door is fully
closed. The sleep mode shuts the garage door opener down until activated. The sleep mode
is sequenced with the garage door opener light bulb; as the light bulb turns off the sensor
LEDs will turn off and whenever the garage door opener lights turn on the sensor LEDs will
light. The garage door opener will not go into the sleep mode until the garage door opener
has completed 5 cycles upon power up.
LIGHTS
The garage door opener light bulbs will turn on when the opener is initially plugged in; power
is restored after interruption, or when the garage door opener is activated. The lights will turn
off automatically after 4-1/2 minutes. An incandescent A19 light bulb (75 watt maximum) or
for maximum energy efficiency a 26W (100W equivalent) compact fluorescent light (CFL)
bulb may be used.
Light Feature
The garage door opener is equipped with an added feature; the lights will turn on when
someone enters through the open garage door and the safety reversing sensor infrared beam
is broken. For added control over the light bulbs on your garage door opener.
USING YOUR GARAGE DOOR OPENER
The garage door opener can be activated through a wall-mounted door control, remote
control, or wireless keyless entry. When the door is closed and the garage door opener is
activated the door will open. If the door senses an obstruction or is interrupted while opening
the door will stop. When the door is in any position other than closed and the garage door
opener is activated the door will close. If the garage door opener senses an obstruction while
closing, the door will reverse. If the obstruction interrupts the sensor beam the garage door
opener lights will blink 10 times. However, you can close the door if you hold the button on
the door control or keyless entry until the door is fully closed. The safety reversing sensors
do not affect the opening cycle. The safety reversing sensor must be connected and aligned
correctly before the garage door opener will move in the down direction.
Operation

5
Operation
Using the Door Control
PUSH BAR
Press the push bar to open or close the door.
LIGHT BUTTON
Press the LIGHT button to turn the garage door opener lights on or off. When the lights are
turned on they will stay on until the LIGHT button is pressed again, or until the garage door
opener is activated. Once the garage door opener is activated the lights will turn off after
the specified period of time (the factory setting is 4-1/2 minutes). The LIGHT button will not
control the lights when the door is in motion.
LIGHT Button
The following features are accessible by lifting up the push bar:
LEARN A DEVICE
Any compatible remote controls or wireless keyless entries can be programmed to the
garage door opener by pressing the LEARN button on the Multi-Function Control Panel.
LOCK
The LOCK feature is designed to prevent activation of the garage door opener from remote
controls while still allowing activation from the door control and keyless entry. This feature is
useful for added peace of mind when the home is empty (i.e. vacation).
AUTOMATIC LIGHT
Light Feature
The lights will turn on when someone enters through the open garage door and the safety
reversing sensor infrared beam is broken.
MAINTENANCE ALERT (MAS)
This feature assists the homeowner in ensuring the garage door opener system stays in
good working condition. When the garage door opener needs to be serviced (approximately
4500 garage door opener cycles) the command (yellow) and service (red) LEDs will begin
to alternately flash back and forth. The factory setting for the MAS feature is off and can be
activated at time of installation. Contact your installing dealer for service.
SERVICE LED
Push Bar
LEARN Button
LOCK Button
COMMAND LED
SYNCHRONIZE THE DOOR CONTROL
To synchronize the door control to the garage door opener, press the push bar until the
garage door opener activates (it may take up to 3 presses). Test the door control by
pressing the push bar, each press of the push bar will activate the garage door opener.

6
Features
Lock NOTE: Your remote controls will NOT work when LOCK mode is active however your keyless entry will still allow access to your garage.
Activate: Press and hold the LOCK button for 2 seconds. The command LED will flash as long as the lock feature is activated and your
handheld remote control will not operate your door at this time.
Deactivate: Press and hold the LOCK button again for 2 seconds. The command LED will stop flashing and normal operation will resume.
Light To change the amount of time the garage door opener lights will stay on (default time is 4-1/2 Minutes):
Press and hold the LOCK button until the garage door opener lights flash.* The garage door opener lights will then indicate the current light
duration by flashing up to 4 times (see table below).
To change the light duration time repeat the steps above until the lights flashes indicate your desired time frame.
NOTE: Factory setting is on.
This feature will turn on the garage door opener lights when the safety reversing sensors beam has been broken.
Deactivate: Start with the garage door opener lights off. Press and hold the LIGHT button to turn on the light, continue to hold until the light
turns off.*
Activate: Start with the garage door opener lights on. Press and hold the LIGHT button to turn off the light, continue to hold until the light
turns on.*
* Approximately 10 seconds
To Program
a Remote
Control or
Keyless Entry
1. Press the LEARN button on the door control to enter Programming Mode.
2. Press the LEARN button again, the LED will flash once.
3. Remote Control: Press the button on the remote control that you wish to operate your garage door.
Keyless Entry: Enter a 4-digit personal identification number (PIN) of your choice on the keyless entry keypad. Then press the ENTER
button.
The garage door opener lights will flash (or two clicks will be heard) when the code has been programmed. If programming is unsuccessful,
repeat steps 1-3 or program the remote using the learn button on the garage door opener.
Maintenance
Alert System
(MAS)
Activate/Deactivate
NOTE: Factory setting is off.
Press and hold the LEARN button. Then press the LIGHT button. The service LED will flash the status; Activated is 2 flashes and deactivated
is 3 flashes.
Programming - Multi-Function Control Panel
Service
LED
LEARN
Button
LOCK
Button LIGHT Button
NUMBER OF TIMES GARAGE DOOR OPENER LIGHTS FLASH 1234
TIME THE GARAGE DOOR OPENER LIGHT STAYS ON 1 ½ Minutes 2 ½ Minutes 3 ½ Minutes 4 ½ Minutes
Operation
Command
LED

7
1Locate the Learn button.
“click”
“click”
2Press and immediately release the Learn
button. The Learn LED will glow steady for
30 seconds. Within 30 seconds...
3Press and hold the button the remote control that you wish to use.
Release the button when the garage door opener lights blink or two clicks are heard.
If programming to other products, press the button a second time to activate products.
PROGRAM USING THE GARAGE DOOR OPENER
Your garage door opener has been programmed at the factory to operate with your remote control. Older LiftMaster remote controls are NOT compatible. Programming can be done
through the door control or the Learn button on the garage door opener. To program additional remote controls refer to the instructions provided with the additional remote controls or visit
www.liftmaster.com. If your vehicle is equipped with a Homelink®, you may require an external adapter depending on the make, model, and year of your vehicle. Visit www.homelink.com for
additional information.
NOTE: The products illustrated in the instructions are for reference. Your product may look different.
ERASE ALL REMOTE CONTROLS AND KEYLESS ENTRIES
1 Press and hold the learn button on garage door opener until the learn LED goes out
(approximately 6 seconds). All remote control and keyless entry codes are now erased
Reprogram any accessory you wish to use.
Programming - Remote Controls
Operation

8
To prevent possible SERIOUS INJURY or DEATH from a falling garage door:
• If possible, use emergency release handle to disengage trolley ONLY when garage
door is CLOSED. Weak or broken springs or unbalanced door could result in an open
door falling rapidly and/or unexpectedly.
• NEVER use emergency release handle unless garage doorway is clear of persons and
obstructions.
• NEVER use handle to pull door open or closed. If rope knot becomes untied, you
could fall.
DISCONNECT THE TROLLEY
1 The door should be fully closed if possible.
2Pull down on the emergency release handle.
RECONNECT THE TROLLEY
The lockout feature prevents the trolley from reconnecting
automatically.
1 Pull the emergency release handle down and back (toward
the opener). The door can then be raised and lowered
manually as often as necessary.
2To disengage the lockout feature, pull the handle straight
down.
The trolley will reconnect on the next UP or DOWN operation,
either manually or by using the door control or remote control.
To Open the Door Manually
Operation

9
UP (Open) DOWN (Close)
Adjustment
Introduction
Without a properly installed safety
reversal system, persons (particularly
small children) could be SERIOUSLY
INJURED or KILLED by a closing
garage door.
• Incorrect adjustment of garage door
travel limits will interfere with proper
operation of safety reversal system.
• After ANY adjustments are made,
the safety reversal system MUST
be tested. Door MUST reverse on
contact with 1-1/2" (3.8 cm) high
object (or 2x4 laid flat) on floor.
To prevent damage to vehicles, be
sure fully open door provides adequate
clearance.
Your garage door opener is designed with
electronic controls to make setup and
adjustments easy. The adjustments allow
you to program where the door will stop in
the open (UP) and close (DOWN) position.
The electronic controls sense the amount of
force required to open and close the door.
NOTE: If anything interferes with the door’s
upward travel it will stop. If anything
interferes with the door’s downward travel,
it will reverse.
To watch a short instructional video on
programming your new garage door opener
use your smartphone to read the QR Code
below:
PROGRAMMING BUTTONS
The programming buttons are located on the
left side panel of the garage door opener and
are used to program the travel.
PROGRAMMING BUTTONS
UP Button
Adjustment Button
DOWN Button

10
Program the Travel
1
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a
closing garage door.
• Incorrect adjustment of garage door travel limits will interfere with proper operation of safety reversal system.
• After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" (3.8 cm)
high object (or 2x4 laid flat) on floor.
1.1 Press and hold the Adjustment
Button until the UP Button begins
to flash and/or a beep is heard.
1.5 Once the door is in the desired
DOWN position press and release
the Adjustment Button. The garage
door opener lights will flash twice
and the UP Button will begin to
flash.
NOTE: The UP and DOWN Buttons can be used
to move the door up and down as needed.
1.6 Press and release the UP Button.
When the door travels to the
programmed UP position, the
DOWN Button will begin to flash.
1.7 Press and release the DOWN
Button. The door will travel to the
programmed DOWN position.
Programming is complete.
1.4 Press and hold the DOWN Button
until the door is in the desired
DOWN position.
NOTE: The UP and DOWN Buttons can be used
to move the door up and down as needed.
If the garage door opener lights are flashing
5 times during the steps for Program the
Travel, the programming has timed out. If
the garage door opener lights are flashing
10 times during the steps for Program the
Travel, the safety reversing sensors are
misaligned or obstructed. When the sensors
are aligned and unobstructed, cycle the
door through a complete up and down cycle
using the remote control or the UP and
DOWN buttons. Programming is complete.
If you are unable to operate the door up and
down, repeat the steps for Programming
the Travel.
Adjustment
1.3 Once the door is in the desired
UP position press and release the
Adjustment Button. The garage
door opener lights will flash twice
and the DOWN Button will begin
to flash.
1.2 Press and hold the UP Button
until the door is in the desired UP
position.

11
2.1 With the door fully open, place
a 1-1/2 inch (3.8 cm) board
(or a 2x4 laid flat) on the floor,
centered under the garage door.
Test the Safety Reversal System
2.2 Press the remote control push
button to close the door. The door
MUST reverse when it makes
contact with the board.
If the door stops and does not reverse on
the obstruction, increase the down travel
(refer to Adjustment Step 1).
Repeat the test. When the door reverses
upon contact with the 1-1/2 inch board,
remove the board and open/close the door 3
or 4 times to test the adjustment.
If the test continues to fail, call a trained
door systems technician.
Without a properly installed safety
reversal system, persons (particularly
small children) could be SERIOUSLY
INJURED or KILLED by a closing
garage door.
• Safety reversal system MUST be
tested every month.
• After ANY adjustments are made,
the safety reversal system MUST
be tested. Door MUST reverse on
contact with 1-1/2" high (3.8 cm)
object (or 2x4 laid flat) on the floor.
2
Test the Protector System ®
3.1 Open the door. Place the garage
door opener carton in the path
of the door.
The garage door opener will not close
from a remote control if the LED in either
safety reversing sensor is off (alerting you
to the fact that the sensor is misaligned or
obstructed).
If the garage door opener closes the
door when the safety reversing sensor is
obstructed (and the sensors are no more
than 6 inches [15 cm] above the floor), call
for a trained door systems technician.
Without a properly installed safety
reversing sensor, persons (particularly
small children) could be SERIOUSLY
INJURED or KILLED by a closing
garage door.
3.2 Press the remote control push
button to close the door. The door
will not move more than an inch
(2.5 cm), and the garage door
opener lights will flash 10 times.
3
Adjustment
2

12
To prevent possible SERIOUS INJURY or DEATH:
• NEVER allow small children near batteries.
• If battery is swallowed, immediately notify doctor.
To reduce risk of fire, explosion or chemical burn:
• Replace ONLY with 3V CR2032 coin batteries.
• DO NOT recharge, disassemble, heat above 212°F (100°C) or incinerate.
The Remote Control Battery
The lithium batteries should produce power
for up to 3 years. If the battery is low, the
remote control’s LED will not flash when the
button is pressed. To replace battery, pry
open the case first in the middle (1), then at
each side (2 and 3) with the visor clip. Insert
battery positive side up.
Replace the batteries with only 3V CR2032
coin cell batteries. Dispose of old batteries
properly.
NOTICE: To comply with FCC and/or Industry Canada (IC) rules, adjustment or modifications of this transceiver are
prohibited. THERE ARE NO USER SERVICEABLE PARTS. Any changes or modifications not expressly approved by the
party responsible for compliance could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC rules and IC RSS-210. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
This Class B digital apparatus complies with Canadian ICES-003.
AVIS : Les règles de la FCC et/ou d’Industrie Canada (IC) interdisent tout ajustement ou toute modification de ce
récepteur. IL N’EXISTE AUCUNE PIÈCE SUSCEPTIBLE D’ÊTRE ENTRETENUE PAR L’UTILISATEUR. Tout changement
ou toute modification non expressément approuvé par la partie responsable de la conformité peut avoir pour résultat
d’annuler l’autorité de l’utilisateur de faire fonctionner l’équipement.
Cet appareil est conforme aux dispositions de la partie 15 du règlement de la FCC et de la norme IC RSS-210. Son
utilisation est assujettie aux deux conditions suivantes : (1) ce dispositif ne peut causer des interférences nuisibles, et (2)
ce dispositif doit accepter toute interférence reçue, y compris une interférence pouvant causer un fonctionnement non
souhaité.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
Maintenance
EVERY MONTH
• Manually operate door. If it is unbalanced or binding, call a trained door systems
technician.
• Check to be sure door opens and closes fully. Adjust if necessary, see page 10.
• Test the safety reversal system. Adjust if necessary, see page 11.
EVERY YEAR
• Oil door rollers, bearings and hinges. The garage door opener does not require additional
lubrication. Do not grease the door tracks.
EVERY TWO TO THREE YEARS
• Use a rag to wipe away the existing grease from the garage door opener rail. Reapply a
small layer of white lithium grease to the top and underside of the rail surface where the
trolley slides.
1
2
3

13
DIAGNOSTIC CODE SYMPTOM SOLUTION
Up arrow
Flash(es) Down arrow Flash(es)
11
The garage door opener will not close and the light
bulbs flash. Safety sensors are not installed, connected, or wires may be cut. Inspect sensor wires for a disconnected or cut wire.
12
The garage door opener will not close and the light
bulbs flash. There is a short or reversed wire for the safety sensors. Inspect safety sensor wire at all staple and connection points, replace wire or correct as needed.
13
The door control will not function. The wires for the door control are shorted or the door control is faulty. Inspect door control
wires at all staple and connection points, replace wire or correct as needed.
14
The garage door opener will not close and the light
bulbs flash. Safety sensors are misaligned or were momentarily obstructed. Realign both sensors to ensure both LEDs are steady and not flickering. Make sure nothing is hanging or mounted on
the door that would interrupt the sensor’s path while closing.
15
Door moves 6-8" stops or reverses. Manually open and close the door. Check for binding or obstructions, such as a broken
spring or door lock, correct as needed. Check wiring connections at travel module and at the
logic board. Replace travel module if necessary.
No movement, only a single click. Manually open and close the door. Check for binding or obstructions, such as a broken
spring or door lock, correct as needed. Replace logic board if necessary.
Opener hums for 1-2 seconds no movement. Manually open and close the door. Check for binding or obstructions, such as a broken
spring or door lock, correct as needed. Replace motor if necessary.
16
Door coasts after it has come to a complete stop. Program travel to coasting position or have door balanced by a trained door systems
technician.
2 1-5 No movement, or sound. Replace logic board.
32
Unable to set the travel or retain position. Check travel module for proper assembly, replace if necessary.
Troubleshooting
Diagnostic Chart
Your garage door opener is programmed with self-diagnostic capabilities. The UP and DOWN arrows on the garage door opener will flash the diagnostic codes.

14
Troubleshooting
Diagnostic Chart
My garage door opener beeps:
The garage door opener can beep for several reasons:
• Garage door opener has been activated through a device or feature such as Timer-to-Close,
garage door monitor or LiftMaster Internet Gateway, see page 4.
My remote control will not activate the garage door:
• Verify the lock feature is not activated on the door control.
• Reprogram the remote control.
• If the remote control will still not activate the door check the diagnostic codes to ensure the
garage door opener is working properly.
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 sensors are properly installed, aligned and free of any obstructions.
DIAGNOSTIC CODE SYMPTOM SOLUTION
Up arrow
Flash(es) Down arrow Flash(es)
4 1-4 Door is moving stops or reverses. Manually open and close the door. Check for binding or obstructions, such as a broken spring
or door lock, correct as needed. If the door is binding or sticking contact a trained door
systems technician. If door is not binding or sticking attempt to reprogram travel (refer to
page 10).
45
Opener runs approximately 6-8", stops and reverses. Communication error to travel module. Check travel module connections, replace travel
module if necessary.
46
The garage door opener will not close and the light
bulbs flash.
Safety sensors are misaligned or were momentarily obstructed. Realign both sensors to
ensure both LEDs are steady and not flickering. Make sure nothing is hanging or mounted on
the door that would interrupt the sensor’s path while closing.
My garage door opener light(s) will not turn off when the door is open:
The garage door opener is equipped with a feature that turns the light on when the safety
reversing sensors have been obstructed. This feature can be disabled using the door control,
see page 6.
My neighbor’s remote control opens my garage door:
Erase the memory from your garage door opener and reprogram the remote control(s).
My vehicle’s Homelink®is not programming to my garage door opener:
Depending on the make, model, and year of your vehicle an external adapter may be required.
Visit www.homelink.com for additional information.

15
Repair Parts
5
6
7
4
2
3
1
DESCRIPTION PART NUMBER
1 Light Lens 108D36
2 Receiver Logic Board 045ACT
3 Travel Module 41D7742-7
4 3V CR2032 Lithium Battery (Remote Control) 10A20
5 Safety Sensor Kit with receiving and sending
sensors with 3 feet (.9 m) 2-conductor wire 41A5034
6 Motor 041D7740
7 Capacitor 30B532
NOTE: For additional parts not shown, visit www.liftmaster.com to download or print the full owner’s manual.
The products illustrated in the instructions are for reference. Your product may look different.

ACCESSMASTER ONE YEAR LIMITED WARRANTY
FOUR YEAR MOTOR LIMITED WARRANTY
The Chamberlain Group, Inc. (“Seller”) warrants to the first retail purchaser of this product, for the residence in which this product is originally installed, that it is free from defects in
materials and/or workmanship for a period of one year from the date of purchase, except that the motor is warranted to be free from defects in materials and/or workmanship for a
period of four years from the date of purchase. The proper operation of this product is dependent on your compliance with the instructions regarding installation, operation, and
maintenance and testing. Failure to comply strictly with those instructions will void this limited warranty in its entirety.
If, during the limited warranty period, this product appears to contain a defect covered by this limited warranty, call 1-800-528-9131, toll free, before dismantling this product. You
will be advised of disassembly and shipping instructions when you call. Then send the product or component, pre-paid and insured, as directed to our service center for warranty
repair. Please include a brief description of the problem and a dated proof-of-purchase receipt with any product returned for warranty repair. Products returned to Seller for warranty
repair, which upon receipt by Seller are confirmed to be defective and covered by this limited warranty, will be repaired or replaced (at Seller’s sole option) at no cost to you and
returned pre- paid. Defective parts will be repaired or replaced with new or factory-rebuilt parts at Seller’s sole option. [You are responsible for any costs incurred in removing and/or
reinstalling the product or any component.]
ALL IMPLIED WARRANTIES FOR THE PRODUCT, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, ARE LIMITED IN DURATION TO THE APPLICABLE LIMITED WARRANTY PERIOD SET FORTH ABOVE FOR THE RELATED COMPONENT(S), AND NO IMPLIED
WARRANTIES WILL EXIST OR APPLY AFTER SUCH PERIOD. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply
to you. THIS LIMITED WARRANTY DOES NOT COVER NON-DEFECT DAMAGE, DAMAGE CAUSED BY IMPROPER INSTALLATION, OPERATION OR CARE (INCLUDING, BUT NOT
LIMITED TO ABUSE, MISUSE, FAILURE TO PROVIDE REASONABLE AND NECESSARY MAINTENANCE, UNAUTHORIZED REPAIRS OR ANY ALTERATIONS TO THIS PRODUCT),
LABOR CHARGES FOR REINSTALLING A REPAIRED OR REPLACED UNIT, REPLACEMENT OF CONSUMABLE ITEMS (E.G., BATTERIES IN REMOTE CONTROL TRANSMITTERS
AND LIGHT BULBS), OR UNITS INSTALLED FOR NON-RESIDENTIAL USE. THIS LIMITED WARRANTY DOES NOT COVER ANY PROBLEMS WITH, OR RELATING TO, THE GARAGE
DOOR OR GARAGE DOOR HARDWARE, INCLUDING BUT NOT LIMITED TO THE DOOR SPRINGS, DOOR ROLLERS, DOOR ALIGNMENT OR HINGES. THIS LIMITED WARRANTY
ALSO DOES NOT COVER ANY PROBLEMS CAUSED BY INTERFERENCE. UNDER NO CIRCUMSTANCES SHALL SELLER BE LIABLE FOR CONSEQUENTIAL, INCIDENTAL OR
SPECIAL DAMAGES ARISING IN CONNECTION WITH USE, OR INABILITY TO USE, THIS PRODUCT. IN NO EVENT SHALL SELLER’S LIABILITY FOR BREACH OF WARRANTY,
BREACH OF CONTRACT, NEGLIGENCE OR STRICT LIABILITY EXCEED THE COST OF THE PRODUCT COVERED HEREBY. NO PERSON IS AUTHORIZED TO ASSUME FOR US ANY
OTHER LIABILITY IN CONNECTION WITH THE SALE OF THIS PRODUCT.
Some states do not allow the exclusion or limitation of consequential, incidental or special damages, so the above limitation or exclusion may not apply to you. This limited warranty
gives you specific legal rights, and you may also have other rights, which vary from state to state.
Warranty
© 2014, The Chamberlain Group, Inc.
114A4754 All Rights Reserved