Sl930 Troubleshooting - Chamberlain LiftMaster SL930 User Manual

SL930 TROUBLESHOOTING

THE GATE WILL NOT STOP OR REVERSE WHEN IT MEETS AN
OBSTRUCTION
Adjust the gate sensitivity. The operator needs to be adjusted
for more sensitivity. This is done by turning the open and
close gate sensitivity adjustments clockwise for more
sensitivity (see page 22).
GATE WILL NOT STAY CLOSED
1. Make sure that the Right/Left Side operation switch is in the
correct position (see page 22). If the Right/Left Side
operation switch is in the incorrect position, the auto close
timer feature may be working in reverse and telling the gate
operator to open after the auto close time has elapsed.
2. Check to see if any input LEDs on terminals 4, 5 or 7 flicker
or illuminate when the gate gets to the closed position.
3. If any of the input LEDs flicker or illuminate on terminals 4,
5, or 7, disconnect wires from that input terminal that is
illuminated until the LED is extinguished to determine which
input device may be activating.
T R O U B L E S H O O T I N G
TIMER WILL NOT CLOSE THE GATE
1. Make sure that the Right/Left Side operation switch is in the
2. Make sure the auto close timer switch is in the ON position
3. Adjust the amount of auto close time (see page 22). The
OPERATOR RUNS IN ONLY ONE DIRECTION
1. Check to see which LEDs are illuminated on the circuit
2. If any of the input LEDs are illuminated on terminals 4, 5, 7
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correct position (see page 22). If the Right/Left Side
operation switch is in the incorrect position, the auto close
timer feature may be working in reverse and telling the gate
operator to open instead of close after the auto close time
has elapsed.
(see page 22). The auto close timer switch is located on the
right edge of the circuit board.
auto close time may be set too high and is simply taking a
long time to close. Do not continue pressing the remote
control or other open or safety input devices because each
time an open or a safety input is given the timer will reset
and begin counting over.
board. For normal operating conditions the only LEDs that
should be illuminated are the stop input at terminal 9 and
Limit Switch 1 input if the gate is in the fully open position
or Limit Switch 2 input if the gate is in the fully closed
position.
or 10, disconnect wires from that input terminal that is
illuminated until the LED is extinguished to determine which
input device may be stuck.