Gate Type: Swing or Slide
Model: 1500, 1550, 1551, 7351, 8500, 3501, Titan12L, Titan12L1
Control Board: 1050, 936
What might show on the Control Board Display: nothing unusual
What you should check: Do you have an 816 actuator and a 1050 or 936 control board?
Cause of the problem: The 816 actuator is shipped ready to connect to the 636 control board.
Next Step you should try: Cut off the white connector and wire the actuator to the control board as instructed in the manual.