LiftMaster 78LM Multi-Function Garage Door Wall Control Owner’s Manual

: June 13, 2024
: LiftMaster

Table of Contents

LiftMaster 78LM Multi-Function Garage Door Wall Control
Product Information
Product Usage Instructions
INSTALLATION
OPERATION
CONTACT
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

LiftMaster 78LM Multi-Function Garage Door Wall Control

Product Information

Product Name: Models 78LM and 78LMC Multi-Function Door Control
Compatibility: For use with garage door openers manufactured after January 1, 1995
Installation: Wall-mounted, typically attached directly to the wall or mounted to a standard single gang box for prewired installations
Features: Lock button, Light button, Push Button with Quick-Connect Terminals, Indicator Light
Safety Warning: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For moreinformation, visit www.P65Warnings.ca.gov
Contact Information: LiftMaster.com | 1-800-528-9131

Product Usage Instructions

Before installation, remove all old or previous push buttons/wall control panels from your garage door opener.
Locate the door control within sight of the door at a minimum height of 5 feet (1.5 m) where small children cannot reach it and away from all moving parts of the door and door hardware.
Disconnect power to the garage door opener.
Strip 1/4 (6 mm) of insulation from one end of the bell wire.
Attach the door control to the wall or a standard single gang box using appropriate screws or mounting hardware.
Connect the bell wire to the appropriate terminals on the door control (red to red, white to white, and grey to grey).
To activate the lock feature, press and hold the Lock button for 2 seconds. The push button indicator light will flash as longas the lock is on.
To turn off the lock feature, press and hold the Lock button again for 2 seconds. The indicator light will stop flashing, and normal operation will resume.
The Lock feature will also turn off whenever the Learn button on the opener end panel is activated.
For any further information or assistance, refer to the provided contact information.

FOR USE WITH GARAGE DOOR OPENERS MANUFACTURED
AFTER JANUARY 1, 1995. To ensure proper functioning of your opener, remove all old or previous push buttons/wall control panels. Use only the enclosed door control for proper operation. Locate the door control within sight of the door at a minimum height of 5 feet (1.5 m) where small children cannot reach, and away from all moving parts of the door and door hardware.

INSTALLATION

The door control is typically attached directly to the wall. For prewired installations (as in new home construction) it can be mounted to a standard single gang box.

Disconnect power to the garage door opener.
Strip 1/4″ (6 mm) of insulation from one end of the bell wireand connect to the two screw terminals on the back of the door control as follows: red/white wire to 1 and white wire to 2.
- NOTE: After installation, the indicator light behind the push button cover will indicate proper connection.
Remove the push button cover by gently prying off the top edge with a screwdriver. Fasten with 6ABx1-1/4″ self-tapping screws (standard installation) or 6-32×1″ machine screws (pre-wired installation) as follows:
- (Standard Installation ONLY) Drill pilot holes and install bottom screw, allowing 1/8″(3 mm) to protrude above the wall surface.
- Position bottom of door control on screw head and slide down to secure. Adjust screw for snug fit.
- Install top screw. Do NOT overtighten, you may damage the plastic housing.
(Standard Installations ONLY) Run bell wire up wall and across ceiling to motor unit. Use insulated staples to secure wire to wall and ceiling in several places. Do NOT pierce wire with a staple, this will create a short or open circuit.
Strip 7/16″ (11 mm) of insulation from the end of the bell wire.
Connect bell wire to terminals as follows:
- Quick Connect Terminals: Red/white wire to red terminal and white wire to white (Figure 1).
- Screw Terminals: Red/white to 1 and white to 2 (Figure 2).
Reconnect power to the garage door opener.
Replace the cover by inserting the bottom tabs and snapping it into place. Test the wall control to ensure proper operation

OPERATION

Door Control Push Button: Press to open or close the door. Press again to reverse the door during the closing cycle, or to stop the door while it is opening.
Light Feature: Press the Light button to switch the opener light on or off. When the door is opened or closed, the light will remain on for 4-1/2 minutes. Press the Light button to turn it off sooner. The Light button will not control the opener light when the door is in motion.
Lock Feature: Designed to prevent operation of the door from portable remote controls. However, the door will open and close from the Door Control push bar and from the Keylock and Keyless Entry accessories.

WARNING

To prevent possible SERIOUS INJURY or DEATH from electrocution:

Be sure power is NOT connected BEFORE installing door control.
Connect ONLY to 24 VOLT low voltage wires.

To prevent possible SERIOUS INJURY or DEATH from a closing garage door:

Install door control within sight of garage door, out of reach of children at a minimum height of 5 feet (1.5 m), and away from ALL moving parts of door.
NEVER permit children to operate or play with door control push buttons or remote control transmitters.
Activate door ONLY when it can be seen clearly, is properly adjusted, and there are no obstructions to door travel.
ALWAYS keep garage door in sight until completely closed. NEVER permit anyone to cross path of closing garage door.

BThis product can expose you to chemicals including lead, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

To activate: Press and hold the Lock button for 2 seconds. The push button indicator light will flash as long as the lock is on.
To turn off: Press and hold the Lock button again for 2 seconds. The indicator light will stop flashing. Normal operation will resume. The Lock feature will also turn off whenever the Learn button on the opener end panel is activated.