I just acquired a Vevor compressor (Orange cover) and filled the rifle according to instructions. After the fill the automatic shut off did what it was designed to do. I then left the fan running and bled the airline. I left the fan running according to the manual. The Led readout began flashing an "E" and a number. Not sure what that meant. Hopefully someone could inform me as to what it means. Empty? Error? Would appreciate anyone with an answer.