Chamberlain 3800E - Manual (Page 18)

18
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 purple button on the unit (Figure 1).
2. Push the purple button twice to enter unit into Force
Adjustment Mode (Figure 2). The LED (Indicator Light)
will flash quickly.
3. Push the remote control or door control (Figure 3). 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 4, “Preparing your garage door.”
Purple
Button
Indicator
Light
Black
Button
BLACK
PURPLE
Push Purple button
twice to enter
unit into Force
Adjustment Mode
Figure 3
Figure 2 Figure 1
or
LOCK
LIG HT
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
• NEVER learn forces or limits when door is binding or
sticking. Repair door first
• Too much force on garage door will interfere with proper
operation of safety reversal system.
• After ANY adjustments are made, the safety reversal system
MUST be tested. Door MUST reverse on contact with 1-1/2"
high (3.8 cm) object (or 2x4 laid flat) on floor.