Chamberlain LM550EVGBSA, Installation And Operating Instructions Manual, Page: 13 / 44

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NOTE: This accessory must be used for all
installations where the closing force as measured
on the bottom of the door is over 400 N (40 kgf).
After the opener has been installed and adjusted, the
Protector System™ accessory can be installed.
Instructions are included with this accessory.
The Protector System™ provides an additional
measure of safety against a small child or animal
being trapped under a garage door. It uses an infra-
red beam, which when broken by an obstruction,
causes a closing door to open and prevents an open
door from closing and is
strongly recommended for
homeowners with young children.
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SAFETY FIRST!
Whilst Chamberlain have engineered safety features into your garage door opener, we urge you to consider
fitting IR Beams to your new garage door opener. In many countries these devices are compulsory to assist in
preventing serious injury or property damage. For your own peace of mind and the safety of others please
install this inexpensive safety device.
WARNING: Automatic door - The door may operate unexpectedly, therefore do not allow
anything to stay in the path of the door.
INSTALL THE PROTECTOR SYSTEM™ (IR BEAMS) OPTIONAL ACCESSORY
Timer to close feature (TTC)
TIMER TO CLOSE feature: (TCC) 10 to 180 seconds.
NOTE: IR beams must be installed before TTC will operate.
The Timer to Close feature allows the door to automatically close after a specified time period. During the
OPEN door waiting period, the courtesy light will flash continuously. If the door encounters an obstruction
while closing, the opener will return to the OPEN position and the waiting period will begin again.
To activate the Timer to Close.
• Start with IRs installed and the door fully CLOSED.
• Press and Hold both “P” and “DN” buttons for 3 seconds. When the
Courtesy light flashes “TWICE”, release both buttons.
• Press the “UP” for each 10 second interval required for
Timer to Close. A “BEEP” will register for each press. “DN” button
will reduce the count if needed.
• Press and release the “P” button to accept this setting.
To Deactivate the Timer to Close.
• Start with the door fully CLOSED.
• Press and Hold both “P” and “DN” buttons for 3 seconds. When the
Courtesy light flashes “TWICE”, release both buttons.
• Press and release the “P” button to accept this setting.
Auto close is NOT recommended for households with young children.
DN DN UP UP P P S S
1 1 2 2 3 3
132A2940
DN DN UP UP P P S S
1 1 2 2 3 3
132A2940
Flash
x 2
BEEP
BEEP
ACTIVATE
TIMER TO
CLOSE
SET
TIME
DN DN UP UP P P S S
1 1 2 2 3 3
132A2940
Flash
x 2
BEEP
ACCEPT
SETTING
ENABLING THE PROTECTOR SYSTEM:
• Connect the IR Beam wiring to the opener and turn ON. (The Protector System will automatically enable
once they are connected and will now operate in a FAIL SAFE mode.)
DISENABLING THE PROTECTOR SYSTEM:
If the Protector System is installed and needs to be removed the opener will need to be reprogrammed.
Perform the power ON/OFF sequence as follows.
• Remove the IR wires from the opener.
• Turn the mains power OFF for 5 seconds.
• Turn the power ON for 5 seconds.
• Turn the power OFF for 5 seconds.
• Turn the power ON and check the opener operates OK without the IR Beams.