LiftMaster LA500 LA500 Manual - Page 42

TROUBLESHOOTING TROUBLESHOOTING CHART FAULT Obstruction in gates path does not cause gate to stop and reverse Photoelectric sensor does not stop or reverse gate. POSSIBLE CAUSES a) Force setting too high a) Incorrect photoelectric sensor wiring b) Defective photoelectric sensor Edge Sensor does not stop or reverse gate. a) Incorrect edge sensor wiring b) Defective edge sensor Alarm sounds for 5 minutes or alarm sounds with a command. Alarm beeps three times with a command. On dual-gate system, one gate is not commanding the other. On dual-gate system, incorrect gate opens first or closes first. Alarm beeps when running. a) Double entrapment occurred a) Low battery a) Defective or incorrect Operator-to-Operator wiring b) Incorrect Operator-to-Operator wireless learning a) Incorrect Bipart switch setting Expansion board function not controlling gate. Maglock not working correctly. a) Defective main board to expansion board wiring b) Incorrect input wiring to expansion board c) Defective expansion board or defective main board a) Maglock wired incorrectly Solenoid lock not a) Solenoid wired incorrectly working correctly. Switched (SW) Accessory power remaining on. a) Main control board is not going to low power mode. Accessories connected to Switch (SW) Accessory power not working correctly, turning off, or resetting. a) Main control board is going to low power mode. CORRECTIONS a) Adjust force setting. Retest that obstruction in gate's path causes gate to stop and reverse direction. a) Check photoelectric sensor wiring. Retest that obstructing photoelectric sensor causes moving gate to stop, and may reverse direction. b) Replace defective photoelectric sensor. Retest that obstructing photoelectric sensor causes moving gate to stop, and may reverse direction. a) Check edge sensor wiring. Retest that activating edge sensor causes moving gate to stop and reverse direction. b) Replace defective edge sensor. Retest that activating edge sensor causes moving gate to stop and reverse direction. a) Check for cause of entrapment (obstruction) detection and correct. Press the reset button to shut off alarm and reset the operator. a) Check if AC power is available. If no AC power, then running on batteries and battery voltage must be 22.0 Vdc or higher. Charge batteries by AC or solar power or replace batteries a) Check operator-to-operator wiring. b) Relearn the wireless network of one operator to the other operator. a) Change setting of both operator's Bipart switch settings. One operator should have Bipart switch ON (operator that opens first) and the other operator should have Bipart switch OFF (operator that opens second) a) Check main board to expansion board wiring. If required, replace wire cable. b) Check wiring to all inputs on expansion board. c) Replace defective expansion board or defective main board a) Check that Maglock is wired to N.O. and COM terminals. Check that Maglock has power (do not power maglock from control board accessory power terminals). If shorting lock's NO and COM wires does not activate Maglock, then replace Maglock or Maglock wiring a) Check that Solenoid is wired to N.C. and COM terminals. Check that Solenoid has power (do not power solenoid from control board accessory power terminals). If shorting lock's NC and COM wires does not activate Solenoid, then replace Solenoid lock or Solenoid wiring a) Photoelectric sensor inputs may be active. a) With expansion board disconnected and running on batteries (no AC power or solar power available), main board will go into low power mode. Move accessory power to Accy Power ON terminals (+, -). Connect expansion board to prevent low power mode. 40