Chamberlain 8550W User manual

Please write the MyQ Serial number in the box above. See page 2.
Register online at:
Wi-Fi Garage Door Opener
USER’S GUIDE
•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 MyQ®
and 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:
www.prodregister.com/LiftMaster
FOR RESIDENTIAL USE ONLY
MODELS 8550W • 8557W • 8587W

2For the complete manual visit LiftMaster.com/Customer-Support
Contents
Important Safety Instructions .............................3-4
Programming ...............................................5-7
Connect your Garage Door Opener to Your Smart
Phone .....................................................5-6
Remote Control ............................................ 7
Erase the Memory......................................... 7
Operation................................................... 8-10
To Open the Door Manually.............................. 8
Battery Backup............................................. 9
The Door Control .......................................... 9
The Protector System®(Safety Reversing Sensors) 10
Adjustment................................................11-13
Introduction ...............................................11
Program the Travel.......................................12
Test the Safety Reversal System.......................13
Test the Protector System®.............................13
Maintenance..................................................14
Troubleshooting..............................................14
Repair Parts ..................................................15
Warranty ......................................................16
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.
Unattended Operation
The Timer-to-Close (TTC) feature, the MyQ®Smartphone
Control app, and MyQ®Garage Door and Gate Monitor are
examples of unattended close and are to be used ONLY
with sectional doors. Any device or feature that allows the
door to close without being in the line of sight of the door
is considered unattended close. The Timer-to-Close (TTC)
feature, the MyQ®Smartphone Control, and any other
MyQ®devices are to be used ONLY with sectional doors.
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.
Date of Purchase:
Product Serial Number
Write down the following information for future reference:
Product S/N:
Accessory Setup Code:
MyQ®Serial Number:
Serial Number:

3
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNING
WARNING
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 install on a one-piece door if using devices
or features providing unattended close. Unattended
devices and features are to be used ONLY with
sectional doors.
15.
SAVE THESE
INSTRUCTIONS.
Important Safety Instructions

4For the complete manual visit LiftMaster.com/Customer-Support
Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNING
WARNING
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 emergency release 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 install on a one-piece door if using devices
or features providing unattended close. Unattended
devices and features are to be used ONLY with
sectional doors.
16.
SAVE THESE
INSTRUCTIONS.

5
Test the Wi-Fi®Signal Strength
Make sure your mobile device is connected to your Wi-Fi network. Hold your mobile device in the place where your
garage door opener will be installed and check the Wi-Fi signal strength.
Before You Begin
You will need:
• Wi-Fi enabled smartphone, tablet or laptop
• Broadband Internet Connection
• Wi-Fi®signal in the garage
• Password for your home network
• MyQ Serial number (Provided during step 3 and located on the garage door opener.)
Check Signal Strength. If you see:
Wi-Fi signal is strong.
The garage door opener will connect to your
Wi-Fi network.
Wi-Fi signal is weak.
The garage door opener may connect to your Wi-Fi network. If
not, try one of the options below to improve the Wi-Fi signal:
No Wi-Fi signal.
The garage door opener will not be able to connect to your
Wi-Fi network. Try one of the options below to improve the
Wi-Fi signal:
• Move your router closer to the garage door opener to minimize
interference from walls and other objects
• Buy a Wi-Fi range extender
Visit WiFiHelp.LiftMaster.com for more details
Proceed to page 6.
Connect With Your Smartphone