We have 3 Atlas Copco air compressors with Elektronikon controls. The master is a VFD unit and the slaves are non VFD's. When the units are running the MCC screen pops up on the VFD units display with RESET above the middle button and one or more of the compressor numbers will have astrisks above them. The only manual we have on them has a brief explination that the Elektronikon told one of the units to do something and didn't get a response. The units seem to run normally in this state.
Any suggestions?
Any suggestions?