Adjustment; Adjust Timer; Adjust Sensitivity - Chamberlain LiftMaster SL930 User Manual

LEFT SIDE INSTALLATION

ADJUST TIMER

The gate operator is designed to work differently while opening
then while closing to optimize safety, so the direction of the
operator will need to be set. Setting the operator direction is done
by flipping the right/left side switch located at the top of the
circuit board (Figure 1). For a left side installation flip the switch
to the left and for a right side installation, flip the switch to the
right.
If it is desirable to have the gate close automatically after the gate
has opened, flip the auto close timer switch to the ON position.
Adjust the amount of time the gate stays open by turning the
timer adjustment pot counter clockwise for less time or clockwise
for more time. The range is roughly 0-45 seconds.

ADJUST SENSITIVITY

For protection of the overall system, there are two "sensitivity"
adjustments on the circuit board for the open and close directions
(Figure 2). Turning the pots clockwise "increase" will cause the
gate to stop or reverse more easily if there is an obstruction
preventing the gate from moving. Turning the pots
counter-clockwise "decrease" will cause the gate to push harder
before it stops or reverses. If adjusted properly, the sensitivity
will cause the gate to reverse if the gate meets an obstruction.
Additionally, if the gate again meets an obstruction before
reaching a limit, the gate will stop, remain stopped, and will
sound an alarm until reset with an open input at terminal 5. If no
reset is given, the alarm will sound for approximately 5 minutes.
If adjusted too sensitive the gate may stop or reverse under it's
own weight, without being obstructed and the sensitivity will need
to be slightly decreased. Temperature, wind, and other
environmental factors may also effect the sensitivity, so the
setting should be made with these factors in mind. Before
finalizing an installation always test the sensitivity by applying
pressure against the gate while it is moving to make sure it will
stop or reverse.
NOTE: Counter-clockwise makes gate push harder. Clockwise
makes gate easier to stop.
A D J U S T M E N T
Wall
Gate Gate
Opener
Figure 1
Figure 2
22
RIGHT SIDE INSTALLATION
Wall
Opener