Setting The Force - Chamberlain Whisper Drive Security+ 459950 Owner's Manual

ADJUSTMENT STEP 2

Setting the Force

The force setting button is located on the left panel
of the motor unit. The force setting measures the
amount of force required to open and close the door.
1. Locate the purple button on the left panel of the motor
unit (Figure 1).
2. Push the purple button twice to enter the opener into
Force Adjustment Mode (Figure 1). The LED (Indicator
Light) will flash quickly.
3. Push the remote control or door control (Figure 2).
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 opener 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
opener 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
garage door."
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED
or KILLED by a closing garage door.
• Too much force on garage door will interfere with proper
operation of safety reversal system.
• NEVER use adjustments to compensate for a binding or
sticking garage door.
• After ANY adjustments are made, the safety reversal system
MUST be tested. Door MUST reverse on contact with 1-1/2"
high object (or 2x4 laid flat) on floor.
Figure 1
Push Purple button
twice to enter
unit into Force
Adjustment Mode
Figure 2
29
Indicator
Light
Black
Button
Purple
Button
or