Have a look at the main PCB. When the function is active, there is a steady light. No light means that the function isn't active now. 

When the gate works as it should (if it's a standard installation), OPERATE should have a steady blue light. SALOON GATE should have a steady green light. No other LED diodes should be activated the whole time. When looking at the main PCB you can get a hint of what the problem can be.

Some examples below:

- When the remote controls keep the gates open, CLEANING will have a steady green light.
- When the PEC doesn't have contact with the reflective tape, OPEN NEXT/SCO CLOSE will have a steady green light.
- When the MPB isn't in closed position, MPB will have a steady red light. 

Additional video

Recommended spare part

- If the Main PCB itself is faulty, below spare part can be ordered.