5-GB
Force Settings
The force, as measured on the closing edge of the door, should not
exceed 400N (40kg). If the closing force is measured to more than
400N, the Protector System must be installed See step 27.
The force setting button is located on the back panel of the motor
unit. The force setting regulates the amount of power required to
open and close the door. If the forces are too light, door travel may be
interrupted by nuisance reversals.
Locate the button (1) on the back panel of motor unit. Push the button
twice to enter into Force Setting Mode. The LED (Indicator Light) will
flash. Push the wall control or the programmed remote control that
was shipped with your opener. The door will travel to either the OPEN
or CLOSE position. Push the button again, the door will travel to the
opposite position. Push the button again if the LED is stilling blinking.
The door must travel through a complete cycle UP and DOWN in
order for the force to be set properly. If the unit reverses before it
reaches the Open or Close Limit repeat the process. The LED
(indicator light) will stop flashing when the force has been learned.
Note: If unable to set limits return to section 24.
25
Test the Safety Reverse System
The safety reverse system test is important. Garage door must
reverse on contact with a 40mm obstacle laid flat on the floor.
Failure to properly adjust opener may result in serious personal
injury from a closing garage door. Repeat test once a month and
adjust as needed.
Procedure: Place a 40mm obstacle (1) laid flat on the floor under the
garage door. Operate the door in the down direction. The door must
reverse on the obstruction. If the door stops on the obstruction, it is
not traveling far enough in the down direction. Increase the down
limit by turning down limit adjustment screw counterclockwise 1/4
turn. Repeat test.
When the door reverses on the 40mm obstacle, remove the
obstruction and run the opener through a complete travel cycle. Door
must not reverse in closed position. If it does, adjust Limits and
Force and repeat safety reverse test.
Test that the door will not fully open when a 20kg weight is added to
the bottom of the door.
26
Install the Protector System
™
(See accessories)
Install this accessory for all installations on Canopy doors,
1 piece dual track doors, doors over 2.5m and when the closing
force as measured on the bottom of the door is over 400N
(40kg).
After 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 being caught under a garage door.
It uses an invisible 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.
Note: The opener will automatically detect the protector system when
it is installed. The opener will not close unless the sensors are
aligned.
27
Program your Keyless Entry (optional)
Activate the opener only when door is in full view, free of
obstruction and properly adjusted. No one should enter or leave
garage while door is in motion. Do not allow children to operate
push button(s) or remote(s). Do not allow children to play near
the door.
NOTE: Your new Keyless Entry must be programmed to operate your
garage door opener.
Program the Receiver to Match Additional Remote Control Code
Using the “LEARN” Button:
1. Press and release the “learn” button (1) on opener. The learn
indicator light will glow steadily for 30 seconds.
2. Within 30 seconds, enter a four digit personal identification number
(PIN) of your choice on the keypad (2), then press and hold the
ENTER button.
3. Release the button when the opener light blinks (3). It has learned
the code. If light bulb is not installed, two clicks will be heard.
NOTE: This method requires two people if the Keyless Entry is
already mounted outside the garage.
Using the Multi-Function Door Control (optional):
1. Enter a four digit personal identification number (PIN) of your
choice on the keypad, then press and hold ENTER (4).
2. While holding the ENTER button, press and hold the LIGHT button
on the Multi-Function Door Control (5).
3. Continue holding the ENTER and LIGHT buttons while you press
the push bar on the Multi-Function Door Control (all three buttons
are held) (6).
4. Release buttons when the opener light blinks. It has learned the
code. If light bulb is not installed, two clicks will be heard (7).
23
Limit Adjustment
Run the opener through a complete travel cycle. Limit adjustments
are not necessary when the door opens and closes completely and
doesn't reverse unintentionally in the fully closed position.
Locate the button (1) on the back panel of motor unit. Push the button
twice to enter into Force Setting Mode.
NOTE: Repeated operation of the opener during adjustment
procedures may cause motor to overheat and shut off. Allow a 15
minute cooling period after 5 continuous operations of the opener.
Read the following carefully before proceeding to Force Adjustment.
Use a screwdriver to make limit adjustments.
If Door Doesn't Open Completely but Opens at Least 1,5m (5
feet): Increase up travel. Turn the up limit adjustment screw (3)
clockwise. One turn equals 5cm (2") of travel.
If door does not open at least 1,5m (5 feet). Adjust force, see
Force Adjustment: Place the opener into the Force Adjustment
Mode, see Force Adjustment.
If Door Doesn't Close Completely: If door arm is at maximum
length, increase down travel. Turn down limit adjustment screw (2)
counterclockwise. One turn equals 5cm (2") of travel. If the door still
will not close completely, the header bracket is positioned too high.
If Opener Reverses in Fully Closed Position: Decrease down
travel. Turn down limit adjustment screw (2) clockwise. One turn
equals 5cm (2") of travel.
If Door Reverses when Closing and there is no Interference to
Travel Cycle: Test door for binding. Pull manual release handle.
Manually open and close door. If door is binding, call a door
serviceman. If door is not binding or unbalanced, place the opener
into the Force Setting Mode, see Force Settings.
PROCEED TO STEP 25 “FORCE SETTINGS” TO COMPLETE
STEP 24 “LIMIT ADJUSTMENT”. Forces must be learned in order
for limit adjustments to operate properly.
24
114A2788C-GB
Summary of Contents for LiftMaster Professional 3780
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