LiftMaster LA500UL Installation Manual - Page 41

TROUBLESHOOTING Troubleshooting Chart SYMPTOM Operator does not run and diagnostic display not on. Control board powers up, but motor does not run. Arm moves, but cannot set correct limits. POSSIBLE CAUSES a. No power to control board b. Open fuse c. If on battery power only, low or dead batteries d. Defective control board a. Reset switch is stuck b. Stop button active or jumper not in place for stop circuit c. If on battery power only, low or dead batteries d. Open or Close input active e. Entrapment Protection Device active f. Vehicle loop detector or probe active g. Defective control board a. Arm does not extend or retract enough during travel b. Arm is interfering with mounting bracket c. Gate is too difficult to move Gate does not fully open or fully close when setting limits. a. Arm does not extend or retract enough during travel b. Arm is interfering with mounting bracket c. Gate is too difficult to move Operator does not respond to a wired control/command (example: Open, Close, SBC, etc.) Operator does not respond to a wireless control or transmitter a. Check Open and Close command input LEDs b. Stop button is active c. Reset button is stuck d. If on battery power only, low or dead batteries e. Entrapment Protection Device active f. Vehicle loop detector or vehicle probe active a. Check XMITTER LED when wireless control is active b. Stop button is active c. Reset button is stuck d. Poor radio reception Gate stops during travel and reverses immediately. a. Control (Open, Close) becoming active b. Vehicle loop detector active c. Low battery voltage SOLUTIONS a. Check AC and battery power b. Check fuses c. Charge batteries by AC or solar power or replace batteries d. Replace defective control board a. Check reset switch b. Check Stop button is not "stuck on", or verify that the stop button is a normally closed circuit, or put a jumper on the stop circuit. c. Charges batteries by AC or solar power or replace batteries d. Check all Open and Close inputs for a "stuck on" input e. Check all Entrapment Protection Device inputs for a "stuck on" sensor f. Check all vehicle detector inputs for a "stuck on" detector g. Replace defective control board a. Disengage the arm and ensure arm moves freely b. Examine the hinge point where the arm mounts to the gate post. Make sure that the arm housing does not hit or interfere with the gate post or mounting bracket. Correct as necessary. c. Disconnect arm from gate and move gate manually. Gate must move easily and freely through its entire range, limit-to-limit. Repair gate as needed. a. Disengage the arm and ensure arm moves freely b. Examine the hinge point where the arm mounts to the gate post. Make sure that the arm housing does not hit or interfere with the gate post or mounting bracket. Correct as necessary. c. Remove arm from gate and move gate manually. Gate must move easily and freely through its entire range, limit-to-limit. Repair gate as needed. a. Check all Open and Close inputs for a "stuck on" input b. Check Stop button is not "stuck on" c. Check Reset button d. Charges batteries by AC or solar power or replace batteries e. Check all Entrapment Protection Device inputs for a "stuck on" sensor f. Check all vehicle detector inputs for a "stuck on" detector a. Activate wireless control and check XMITTER LED is on. Re-learn wireless control/transmitter to control board. Replace wireless control as needed. b. Check Stop button is not "stuck on" c. Check Reset button d. Check if similar wired control operates correctly. Check if wireless controls works properly when within a few feet of operator. Check operator's antenna and antenna wire. Check other wireless controls or devices. a. Check all Open and Close inputs for an active input b. Check all vehicle detector inputs for an active detector c. Battery voltage must be 23.0 Vdc or higher. Charge batteries by AC or solar power or replace batteries 41