LiftMaster LA500 LA500 Manual - Page 41

TROUBLESHOOTING TROUBLESHOOTING CHART FAULT Gate stops during travel and reverses immediately. Gate opens, but will not close. Gate closes, but will not open. Gate does not close from Timer-to-Close. Vehicle Exit loop activation does not cause gate to open. Vehicle Interrupt loop does not cause gate to stop and reverse. Vehicle Shadow loop does not keep gate at open limit. POSSIBLE CAUSES a) Check DIAGNOSTIC LEDs b) Inherent force obstruction detection c) External Entrapment Protection Device activation d) Control (Open, Close) becoming active e) Vehicle loop detector active f) Low battery voltage a) Check DIAGNOSTIC LEDs b) Open control active c) Close Entrapment Protection Device active d) Vehicle loop detector active e) Loss of AC power with AC FAIL set to OPEN f) Low battery with LOW BATT set to OPEN g) Fire Dept input active a) Check DIAGNOSTIC LEDs b) Open Entrapment Protection Device active c) Vehicle loop detector active d) Low battery with LOW BATT switch set to close e) Low battery with LOW BATT option set to CLOSE a) Timer-to-Close not set b) Open control active c) Close Entrapment Protection Device active d) Vehicle loop detector active e) Loss of AC power with AC FAIL set to OPEN f) Low battery with LOW BATT option set to OPEN g) Fire Dept input active a) Check DIAGNOSTIC LEDs b) Exit vehicle detector setup incorrectly c) Defective Exit loop detector or loop wire d) Low battery with LOW BATT option set to CLOSE a) Check DIAGNOSTIC LEDs b) Vehicle detector setup incorrectly c) Defective vehicle loop detector or loop wire a) Check DIAGNOSTIC LEDs b) Vehicle detector setup incorrectly c) Defective vehicle loop detector or loop wire CORRECTIONS a) Use Diagnostic code to identify issue b) Check for obstruction in gate's path or travel. Remove arm from gate and move gate manually. Gate must move easily and freely through its entire range, limit-to-limit. Remove obstruction or repair gate as needed. c) Check all Entrapment Protection Device inputs for an active sensor d) Check all Open and Close inputs for an active input e) Check all vehicle detector inputs for an active detector f) Battery voltage must be 22.0 Vdc or higher. Charge batteries by AC or solar power or replace batteries a) Use Diagnostic code to identify issue b) Check all Open inputs for an active input c) Check all Entrapment Protection Device inputs for an active sensor d) Check all vehicle detector inputs for an active detector e) Check AC power and AC Fail option setting f) Battery voltage must be 22.0 Vdc or higher. Charge batteries by AC or solar power or replace batteries g) Check Fire Dept input a) Use Diagnostic code to identify issue b) Check all Entrapment Protection Device inputs for an active sensor c) Check all vehicle detector inputs for an active detector d) Battery voltage must be 22.0 Vdc or higher e) 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 Timer-to-Close (TTC) setting b) Check all Open inputs for an active input c) Check all Entrapment Protection Device inputs for an active sensor d) Check all vehicle detector inputs for an active detector e) Check AC power and AC Fail option setting f) 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. g) Check Fire Dept input a) Use Diagnostic code to identify issue b) Review Exit loop detector settings. Adjust settings as needed. c) Check Exit loop wire. Replace defective Exit loop detector. d) 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) Use Diagnostic code to identify issue b) Review Interrupt loop detector settings. Adjust settings as needed c) Check Interrupt loop wire. Replace defective Interrupt loop detector a) Use Diagnostic code to identify issue b) Review Shadow loop detector settings. Adjust settings as needed c) Check Shadow loop wire. Replace defective Shadow loop detector 39