Smart Garage Opener
• 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
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 compatible with MyQ® and
is connected
®
Security+ 2.0® accessories.
• 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.
Owner's Manual
C870
Chain Drive
Garage Door Opener
FOR RESIDENTIAL USE ONLY
PRE-PROGRAMMED REMOTE CONTROL
INCLUDED
TO WATCH VIDEOS GO TO:
tinyurl.com/lgh5x3h
Contents
Preparation ......................................2-5
Assembly .........................................6-9
Installation .................................. 10-27
Install the Door Control ............ 20-21
Install the Protector System® .... 22-25
Power ...................................... 26-27
Adjustments ................................. 28-30
Battery Backup ..................................31
MyQ® Smartphone Control .................32
Operation ..................................... 33-37
Using your Garage Door Opener .....34
To Open the Door Manually ...........34
Smart Control Panel® ............... 35-36
Remote Control and
Keyless Entry ................................36
Homelink® ...................................36
To Erase the Memory .....................37
Maintenance .....................................38
Troubleshooting ........................... 39-40
Accessories ........................................41
Warranty ...........................................42
Repair Parts ................................. 43-44
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www.mychamberlain.com
Need help?
Do you have a question about the C870 and is the answer not in the manual?
Questions and answers
Error code4-1
Error code 4-1 for the Chamberlain C870 means the door is moving, then stops or reverses. The recommended solution is to manually open and close the door, check for binding or obstructions such as a broken spring or door lock, and correct as needed. If the door is not binding or sticking, attempt to reprogram the travel. If the problem persists, contact a trained door systems technician.
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