Chamberlain LiftMaster Professional 33LM Owner's Manual page 2

3-button remote control transmitter

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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.

To use the transmitter with a 3-channel

receiver and 3-button door control to

AVERTISSEMENT

operate a commercial door opener

ATTENTION

3 Channel Receiver

1. Use a screwdriver to pry open the

receiver cover (see illustration).

NOTE: The slide switch is factory set to the

N.C. position (otherwise the opener will not

operate). Verify this setting.

2. Select a remote control push button to

STOP the opener. (RED is

recommended.) Press and hold the

selected remote push button.

3. Then press and release the "learn"

button labeled "A" on the receiver. The

adjacent indicator light will FLASH.

Release the remote push button.

Repeat the procedure above with the yellow remote push

button and receiver "learn" button "B" to program the

CLOSE operation; and again with the green remote push

button and receiver "learn" button "C" to program the

OPEN function of the opener.

Return the front cover to the receiver.

(For this application, code switch settings need not be

changed.)

NOTE: If a remote control push button is not pressed

within 30 seconds, the indicator light adjacent to the

selected "learn" button will turn OFF. In that case, repeat

the programming.

114A1938E

WARNING

CAUTION

Replacing the transmitter battery

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. To

replace the battery, slide the

battery compartment cover.

Dispose of old batteries properly.

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.

FOR SERVICE DIAL OUR TOLL-FREE NUMBER:

1-800-528-2817