LiftMaster SW425 SW425 Manual - Page 21

TROUBLESHOOTING GATE BEGINS TO OPEN OR CLOSE, THEN STOPS OR REVERSES • Adjust the gate sensitivity (page 15). If the gate sensitivity adjustment is too sensitive, the gate may stop in mid-travel or reverse. • It may be necessary to lubricate any mechanical parts on the gate such as wheels and clean the gate track of any debris. • Watch the input LEDs on terminals 4, 5, 7 and 10 while the gate operator is running to see if any of the LEDs flicker or illuminate. • If there is an input LED that flickers or illuminates while the gate is running, disconnect the wires one at a time from that input terminal until the LED does not flicker or illuminate to determine which input device may be activating. • If it is the radio receiver that appears to be stuck in the on condition, check all remote controls to see if any of them may be stuck on. A stuck remote control may cause the gate operator to reverse. GATE WILL NOT OPEN OR CLOSE Test the operator to find out whether the open input devices are functioning by following these steps. • If a remote control is being used to open the gate, try another remote control or try using a push button if there is one installed. • If a push button is being used, try using another push button or a remote control. • If there is no push button installed, the gate may be operated by connecting a jumper wire to terminal 6 and momentarily touching it to terminal 5 or 7. • If the remote controls are not working, see REMOTE CONTROL DOES NOT WORK on the previous page. • Check the motor fuse and replace it if necessary. • Check to see which LEDs are illuminated on the circuit 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. • If any of the input LEDs are illuminated on terminals 4, 5, 7 or 10, disconnect wires from that input terminal that is illuminated until the LED is extinguished to determine which input device if any may be stuck. • If the stop input LED on terminal 9 is not illuminated, check the stop input device if any are installed and all connections to the device. If no stop input device is installed make sure that there is a jumper between terminals 8 and 9 and that it is securely fastened. • Check the circuit breaker button. If the circuit breaker is tripped, press it back in. • Make sure there is power to the circuit board on terminals 13 and 15. GATE WILL NOT OPEN OR CLOSE • Make sure that the Right/Left side operation switch is in the correct position (page 15). 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. • Check to see if any input LEDs on terminals 4, 5 or 7 flicker or illuminate when the gate gets to the closed position. • 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 if any may be activating. TIMER WILL NOT CLOSE THE GATE • Make sure that the Right/Left side operation switch is in the correct position (page 15). 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. • Make sure the auto close timer switch is in the ON position (page 15). The auto close timer switch is located on the top corner of the circuit board. • Make sure that the radio receiver, push button or other open input device is connected to open input terminals 5 and 6. The timer may not work if any of these devices are connected to pulse open input terminals 6 and 7. • Adjust the amount of auto close time (page 15). The 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. OPERATOR RUNS IN ONLY ONE DIRECTION • Check to see which LEDs are illuminated on the circuit 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. • If any of the input LEDs are illuminated on terminals 4, 5, 7 or 10, disconnect wires from that input terminal that is illuminated until the LED is extinguished to determine which input device may be stuck. GATE WILL NOT STOP OR REVERSE WHEN IT MEETS AN OBSTRUCTION Adjust the gate sensitivity (page 15). The operator may need to be adjusted for more sensitivity. This is done by turning the open and close gate sensitivity adjustments clockwise for more sensitivity. 21