Beninca actuator arm not moving at al

[Andruelectricgates]

i have a customer with a Beninca primier Actuator arm control by a brainy 24 i am getting a pno2 and the gate do not move i have tried all tricks in the book you can hear the clicker give the open command but gate do not move i have test 
the arms indivaully with 24volts thay move freely how do i get rid of pno2 and get the gates in operation

Thanks Any help will do