Off the top of my head I think 2301 fault is that CPU is not seeing a hall board. Try pulling the XM16 plug on the right side of the CPU and power off the main disconnect. Wait 30 seconds or so. Power back up with XM16 plug still removed wait about 30 seconds and plug XM16 back in CPU will come alive go back and try resetting the phase 1 key switch. Sometimes the sudden power surge when you power up from the disconnect will lock up CPU.