LiftMaster HCTDCU HCTDCU Installation Manual - Page 38

TROUBLESHOOTING TROUBLESHOOTING CHART SYMPTOM Operator does not run and diagnostic code display not on Control board powers up, but motor does not run Gate/door moves, but cannot set correct limits Gate/door does not fully open or fully close when setting limits Operator does not respond to a wired control/command (example: Open, Close, SBC, etc.) Operator does not respond to a wireless control or transmitter Gate/door stops during travel and reverses immediately 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) Gate/door does not move to a limit position b) Gate/door is too difficult to move c) Limits are set too close a) Gate/door does not move to a limit position b) Gate/door is too difficult to move 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 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 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 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) Use manual disconnect, manually move gate/door, and ensure gate/door moves easily limit to limit. Repair gate/door as needed. b) Gate/door must move easily and freely through its entire range, limit to limit. Repair gate/door as needed. c) Ensure the gate/door moves at least one foot (30.5 cm) between the OPEN limit and the CLOSE limit. a) Use manual disconnect, manually move gate/door, and ensure gate/door moves easily limit to limit. Repair gate/door as needed. b) Gate/door must move easily and freely through its entire range, limit to limit. Repair gate/door 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) Charge batteries 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 or replace batteries. Gate/door opens, but will not close with transmitter or Timer-to-Close Gate/door closes, but will not open a) Open control active b) Vehicle loop detector active c) Loss of AC power with AC FAIL set to OPEN d) Low battery with LOW BATT set to OPEN e Fire Dept input active f) Timer-to-Close not set g) Close Entrapment Protection Device active a) Vehicle loop detector active b) Low battery with LOW BATT option set to CLOSE a) Check all Open inputs for an active input. b) Check all vehicle detector inputs for an active detector. c) Check AC power and AC Fail option setting. d) Check if AC power is available. If no AC power, then running on batteries and battery voltage must be 23.0 Vdc or higher. Charge batteries or replace batteries. e) Check Fire Dept input. f) Check Timer-to-Close (TTC) setting. g) Check all Entrapment Protection Device inputs for an active sensor. a) Check all vehicle detector inputs for an active detector. b) Check if AC power is available. If no AC power, then running on batteries and battery voltage must be 23.0 Vdc or higher. Charge batteries or replace batteries. 38