51C - Garage door remote LiftMaster - Free user manual and instructions

Product Type	Garage Door Remote Control
Brand	LiftMaster
Model	51C (compatible with 61LM, 62LM, 33LM, 63LM, 64LM and others)
Power Supply	12V battery (reference 10A14)
Frequency	390 MHz (fixed code)
Number of Buttons	1, 2 or 3 depending on model
Estimated Range	30 to 50 meters
Approximate Dimensions	60 x 30 x 15 mm
Approximate Weight	50 g (with battery)
Main Functions	Activate a garage door opener, lighting control, or gate closure
Programming	Via Dip switches or smart/learn button
Safety	Dip switches for custom code; keep out of reach of children
Maintenance	Replace 12V battery (lifespan of at least one year)
Spare Parts	Sun visor clip (29C128), 12V battery (10A14)
Compatibility	LiftMaster products using a fixed code at 390 MHz
Standards	FCC compliant (home/office use)
Warning	Never allow a child to operate the remote control
Technical Support	1-800-528-9131 (USA)

Frequently Asked Questions - 51C LiftMaster

How to program the LiftMaster 51C remote control with an existing receiver?

Locate the Dip switches on the old and new remote controls. Place them side by side and set the Dip switches of the new remote to match the positions (+, 0, -) of the old one.

How to program the remote control without an existing remote?

Set the Dip switches to any position (+, 0, -). Then, use the smart/learn button on the receiver: press and release, then within 30 seconds, press and hold the desired button on the remote control.

How to replace the battery of the 51C remote control?

Slide the battery compartment cover to access the battery. Replace it with a 12V battery (reference 10A14) respecting polarity. Dispose of the old battery according to local regulations.

What to do if the remote control stops working?

First check the battery (replace if necessary). Ensure the Dip switches match those of the receiver. If the problem persists, reprogram the remote control using the smart/learn button.

Is the LiftMaster 51C remote control compatible with all garage door openers?

No, it is only compatible with LiftMaster products using a fixed code at 390 MHz. Check the frequency of your receiver.

How to program a 3-button remote control from a 1- or 2-button remote?

It is important to correctly set Dip switch #1. For example, if you want the center button to correspond, Dip switch #1 must be set to '0'. Follow the correspondence table in the manual.

What are the safety risks related to using the remote control?

Serious injury or death can occur if the door is operated while a person or obstacle is in the path. Always keep the door in sight and never allow children to play with the remote control.

How to use the remote control with a 423LM receiver (3 channels)?

Use a screwdriver to open the receiver. Set the slide switch to N.C. Press the smart/learn button 'A', then within 30 seconds press the red button on the remote for CLOSE mode. Repeat with 'B' (yellow button) for STOP and 'C' (green button) for OPEN.

What is the maximum range of the remote control?

The range is not specified in the manual, but it is generally around 30 to 50 meters in open field.

Where can I get spare parts for the 51C remote control?

Available parts are the sun visor clip (ref. 29C128) and the 12V battery (ref. 10A14). Contact LiftMaster technical support at 1-800-528-9131 or visit www.liftmaster.com.

USER MANUAL 51C LiftMaster

• ALWAYS keep remote controls out of reach of children. NEVER permit children to operate, or play with remote control transmitters.
• Activate gate or door ONLY when it can be seen clearly, is properly adjusted, and there are no obstructions to door travel.
• ALWAYS keep gate or garage door in sight until completely closed. NEVER permit anyone to cross path of moving gate or door.

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 more information go to www.P65Warnings.ca.gov

INTRODUCTION

This product is for use with gate operators, commercial door operators and any LiftMaster® product that uses a 390 MHz fixed code. The single-button remote control will activate one device, the 2-button remote control will activate up to 2 devices, and the 3-button remote control will activate up to 3 devices.

BEFORE YOU BEGIN

Locate the dip switches on your remote control

Single-Button and 3-Button Remote Controls:

Slide the battery cover open to access the dip switches in the remote control.

2-Button Remote Control:

The 2-button remote control has two sets of dip switches.

Slide the battery cover open to access the dip switches for the smooth button. Remove the screw on the back of the remote control and remove the cover by pressing the tab. This will access the dip switches for the ribbed button.

3-Button Mini Remote Control:

The large top button is recommended for use with a garage door opener and/or light control product. The other push buttons can be used to operate another garage door opener and/or light control product.

Access the dip switches by turning the remote over and removing the back of the case. Be careful to avoid moving circuit board components.

Single and 3-Button Remote Controls

graph LR
    A["Server"] --> B["Device with internal components"]
    B --> C["Symbol: circular symbol"]

2-Button Remote Controls

Tab

Mini Remote Controls

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Use a pen or screwdriver to slide the dip switches.

Programming the remote control to an existing remote control

Locate the dip switches in the new and old remote controls. Place remote controls side by side and set the dip switches in the remote controls to matching positions (+,0,-).

Programming a 3-button remote control

When programming a single or 2-button remote control to a 3-button remote control it is very important to set dip switch #1 to the correct position. The dip switch in the single or 2-button remote control MUST correspond to the buttons on the 3-button remote control as shown.

Example: If you are programming a single-button remote control to the middle button on the 3-button remote control, dip switch #1 in the single-button remote control MUST be set to "0" in order for both buttons to work.

Programming the remote control without an existing remote control

Set the dip switches in the remote controls to any position you want (+,0,-).

Programming with Smart/Learn button

1 Press and release the Smart/Learn button on your product. The LED will light.
2 Within 30 seconds press and hold the button on the remote control that you wish to activate your product.

Programming is complete.

Repeat the steps above for each button and/or remote control you would like to program.

Programming with dip switches

1 Check the dip switch settings on the back of your product.
2 Use a pen or screwdriver to slide the dip switches in the remote control to match the dip switches on the back of the product.

When the dip switches have been set press the remote control button to activate your product.

New Remote Control = Existing Remote Control

Single or 2-Button Remote Control 3-Button Remote Control

Dip switch #1 must correspond to the 3-button remote control buttons

+ 0 -

New Remote Control

1 Smart/Learn Button

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2

Line drawing of a hand holding a credit card (no text or symbols visible)

Dip Switch Settings From Product

Diagram showing two identical electrical or electronic components with numbered bands and polarity indicators (+, 0, 1)

WARNING

Install the control station and receiver where the door is visible, but away from the door and its hardware. When a receiver is used to activate a commercial door opener, a reversing edge MUST be installed on the bottom of the door. Failure to install a reversing edge under these circumstances may result in SERIOUS INJURY or DEATH to persons trapped beneath the door.

Model 33LM 3-button remote controls can also be used with a 423LM 3-channel receiver and a 3-button door control to activate a commercial door operator in OPEN, CLOSE, and STOP mode.

1 Use a screwdriver to pry open the receiver cover.
2 Verify that the slide switch on receiver is set to the N.C. position (other wise the commercial door operator will not operate).
3 Press and release the Smart/Learn button labeled "A" on the receiver. The adjacent LED will flash.
4 Within 30 seconds press and release the red button on the remote control. The red button is now programmed for CLOSE mode.

NOTE: If the remote control button is not pressed within 30 seconds, the LED next to the selected Smart/Learn button will turn OFF. In that case, press the Smart/Learn button again to repeat programming.

1

2 N.C. Slide Switch

"A" Smart/Learn Button 3

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Repeat the steps 3-4 above with the yellow button on the remote control and the receiver Smart/Learn button "B" to program the CLOSE mode; and again with the green button on the remote control and the receiver Smart/Learn button "C" to program the OPEN mode.

5 Replace the receiver cover.

5 6

WARNING

To prevent possible SERIOUS INJURY or DEATH:

• NEVER allow small children near batteries.
• If battery is swallowed, immediately notify doctor.

The 12 volt battery should produce power for 1 year.

Dispose of old batteries properly.

power for

NOTICE: To comply with FCC and or Industry Canada rules (IC), adjustment or modifications of this receiver and/or remote control are prohibited, except for changing the code setting or replacing the battery. THERE ARE NO OTHER USER SERVICEABLE PARTS.

Tested to Comply with FCC Standards FOR HOME OR OFFICE USE. 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.

REPLACEMENT PARTS

Visor clip 29C128

12V battery 10A14

FOR TECHNICAL SUPPORT DIAL OUR TOLL FREE NUMBER:

1-800-528-9131

www.liftmaster.com

LiftMaster®

graph LR
    A["Rectangular Panel"] --> B["Gray Box with Internal Components"]
    B --> C["Arrow Left"]
    B --> D["Arrow Right"]

Diagram showing equivalence between two computer monitors with labeled buttons and a battery icon

Hand inserting a small component into a wall socket (no text or symbols visible)

2

Line drawing of a hand holding a card (no text or symbols visible)

Line drawing of a hand holding a credit card (no text or symbols visible)

Diagram showing a device with a black arrow pointing to a screen, labeled in Chinese characters.

AVERTISSEMENT