Chamberlain LiftMaster 831-2LM User manual

Carton Inventory

Overview

The Intercom has up to a 1000' range and allows

multiple simultaneous conversations, using a 900 MHz

secure digital radio link. The intercoms form an

exclusive network and respond only to other intercoms

in the network.

Mounting Tape

Alcohol Wipe

Intercom (2)

Operation & Features

Call Mode: In Call Mode the intercom may only be

used to call the intercom network and will not be able

to hear conversation from within the network.

To put intercom into Call Mode place

Dipswitch #1 to the UP position.

Volume: To increase the intercom

volume, place Dipswitch #4 to the UP

position.

Sensitivity: To increase sensitivity on

the intercom set Dipswitch #3 to the

UP position.

NOTE: Dipswitch #2 is not used.

Talk Button: To talk, hold down the Talk button and

all intercoms in the network will receive the signal.

When holding down the Talk button on a different

intercom, a secure channel is created and the other

intercoms in the network do not hear the

conversation.

Battery: The AA Alkaline batteries (not provided) will

last up to a year depending on use (lithium batteries

recommended for colder environments). When the

batteries are low it will emit three beeps every ten

minutes.

Talk Button

Speaker

Model 831-2LM

Wireless Indoor/Outdoor Intercom

Learn Button

Dipswitch

Block

Mounting Intercom

Step 1

Mount Intercom with small silver screws. Screw the

top two screws halfway into the mounting surface.

Place back of intercom over screws. Tighten screws.

The Intercom can be mounted by using the included

screws or by using the double-sided mounting tape.

It is recommended to use the mounting tape on

surfaces such as metal or glass.

Put the remaining silver screws into the bottom holes

of intercom. Tighten screws.

Mounting with Screws

Step 2

Step 1

Peel off white paper from mounting tape. Firmly

press mounting tape on back of intercom.

Clean back of intercom and mounting surface using

the alcohol wipe.

Mounting with Tape

Step 2

Step 3

Assemble Intercom

Create New Network

The intercom must be programmed to at least one

other intercom to become a network or it can be

programmed into an existing network.

Before programming, clear memory on all intercoms.

Press the Learn button on the new intercom until a

beep is heard. Within 10 seconds put the second

intercom into Learn Mode (refer to table below).

Add to an Existing Network

Each intercom will emit a tone when entering

programming mode. It may take up to 3-1/2 minutes

for a secure network to be established. Repeat for

any additional intercoms.

NOTE: Do not program new intercoms to each other

before adding them to the network or they will form a

separate network and the memory will need to be

cleared.

Install 4 AA Alkaline batteries (not provided).

(Lithium batteries recommended for colder

environments.)

Programming Intercom

Each intercom will emit a tone when entering

programming mode. It may take up to 3-1/2 minutes

for a secure network to be established.

INTERCOM LEARN MODE

Press the Learn button

until a beep is heard.

Press the Learn button on the new intercom until a

beep is heard. Within 10 seconds put any networked

intercom into Learn Mode (refer to table below).

INTERCOM LEARN MODE

Press the Learn button until

a beep is heard.

HOLD

ACTIVE

TALK

VOLUME

MONITOR

CHANNEL

OFF

HOLD

ACTIVE

TALK

VOLUME

MONITOR

CHANNEL

OFF

Troubleshooting

Intercom does not function.

Check batteries in Intercom. When you press the

Talk button you should hear a tone.

Ensure Intercom is connected to a network.

See Assemble & Program.

Intercom is not getting expected transmission

range.

Keep Intercom away from trees, metal objects and

electrical wiring. Do not mount intercom on a tree,

masonry, or metal surface.

Intercom beeps every ten minutes.

The battery is low in the intercom. Replace with

AA Alkaline batteries.

Need to clear intercom’s memory.

Press and hold Learn button, an initial beep will be

heard. Continue to hold until a second beep is heard

(about 6 seconds). Ensure other intercoms are not

activated during this time. Once memory is clear the

intercom can be programmed to a new network.

Intercom can not be programmed to network.

A network may contain up to 12 intercoms.

It may be necessary to clear the network and

reprogram all the intercoms to the network.

See Programming Intercom.

NOTE: Manufacturer is not responsible for any radio

or TV interference caused by unauthorized

modifications to this equipment. Changes or

modifications not expressly approved by the

manufacturer could void the authority to operate the

equipment.

Secure cover with the two large black screws.

Secure Cover

NOTICE: To comply with FCC and or Industry Canada rules (IC), adjustment or modifications of this

receiver and/or transmitter 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.

One Year Limited Warranty

The Chamberlain Group, Inc. warrants to the first retail purchaser of this product that it is free from defect in materials

and/or workmanship for a period of 1 year from the date of purchase.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of

the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in

accordance with the instructions, may cause harmful interference to radio communications. However, there is no

guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to

radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try

to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

FOR TECHNICAL SUPPORT DIAL OUR TOLL FREE NUMBER:

1-800-528-9131

www.liftmaster.com

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