Piston compressor starts up then trips

Hi, It looks like this compressor monitors the outlet pressure, and when the pressure doesn't increase when the compressor starts, it gives an error (because something must be wrong). So please check if there is any pressure built up during those 5 seconds? What can also happen is that the pressure sensor is broken, that's why the compressor gives this error, because it thinks that there's no pressure. The fact that the solenoid opens, then closes and the opens is normal I think. At first, it's open because the compressor is starting up (blowing off any pressure, to make for an easy start). After that it closes, so the compressor starts to built pressure But there's an error, so the compressor stops again and the pressure is blown off (solenoid open). So please check what I said in the beginning: is it building pressure? And check the pressure sensor. Good luck! And please let me know the outcome! Cas