Hard Shutdown (two back to back obstructions) LED blinking, Buzzer sounds for 5 minutes 936 control board February 14, 2020 22:46 Updated Clear any obstructions from the path of the gate. Press RESET to clear (or hard reset button). Related articles Nice | HySecurity Product Spotlight Brochure Emerson Commander SK Variable Frequency Drive- Hardware Fault Codes (HF) Nice product Motor amperage Battery will not charge DC System Gate will not operate (other); Power LED is on