I am working on an mce Imc and I do not get a run enable I've swapped the ddp board the dio board and the das board with known good boards I have all my correct voltage but still no run enable. On the F3 screen under faults I have a pps fault. I get all my directional relays when I try to run on inspect and if I try to run on test I get directional and high speed relays. Anyone have any ideas MCE seams to be stumped also