LiftMaster LM3800TX Mode D'emploi page 32

ADJUSTMENT STEP 2
Setting the Force
The force setting button is located on the front panel. The force
setting measures the amount of force required to open and close
the door.
1. Locate the orange button on the unit.
2. Push the orange button twice to enter unit into Force Adjustment
Mode. The LED (Indicator Light) will flash quickly.
3. Push the remote control or door control. The door will travel to the
DOWN (close) position. Push the remote control or door control again,
the door will travel to the UP (open) position. Push the remote control
or door control a third time to send the door to the DOWN (close)
position.
The LED (Indicator Light) will stop flashing when the force has been
learned.
The unit has learned the forces required to open and close your door.
The door must travel through a complete cycle, UP and DOWN, in order
for the force to be set properly. If the unit cannot open and close your
door fully, inspect your door to insure that it is balanced properly and is
not sticking or binding. See page 3, "Preparing your door."
ADJUSTMENT STEP 3
Test Cable Tension Monitor
If your cable tension monitor has been activated the unit will click 9
times. See page 19.
ADJUSTMENT STEP 4
Test Power Door Lock
TEST
• With the door fully closed, the power door lock bolt should be
protruding through the track.
• Operate the door in the open direction. The power door lock should
retract before the door begins to move.
• Operate the door in the down direction. When the door reaches the
fully closed position, the power door lock should automatically activate
to secure the door.
NOTE: If the power door lock does not function, the lock can be
manually released by sliding the manual release handle to the open
position.
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ADJUSTMENT STEP 5
Test the Safety Reversal System
TEST
• With the door fully open, place a 50mm (1 1/2") board (or a 4x2 laid
flat) on the floor, centered under the the door.
• Operate the door in the down direction. The door must reverse on
striking the obstruction. Upon successful safety reversal test proceed
to Adjustment Step 4.
ADJUST
• If the door stops on the obstruction, it is not traveling far enough in the
down direction. Complete Adjustment Steps 1 and 2 Programming the
Limits and Forces.
• Repeat the test.
• When the door reverses on the 50mm (1 1/2") board (or 4x2 laid flat),
remove the obstruction and run the operator through 3 or 4 complete
travel cycles to test adjustment.
• If the unit continues to fail the Safety Reverse Test, call for a trained
door systems technician.
IMPORTANT SAFETY CHECK:
Test the Safety Reverse System after:
• Each adjustment of limits, or force controls.
• Any repair to or adjustment of the door (including springs and
hardware).
• Any repair to or buckling of the floor.
• Any repair to or adjustment of the operator.
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