I don't know anything specifically about the Accurite system but...

First thing to check on any system like this is plugs and sockets - take them apart at inspect closely for corrosion (especially if they are exposed to coolant spray) remove the covers and check the wires inside the plugs (same goes for switches).

If any of the cables are flexed by the movement of the machine, consider replacing them (the conductor wire work hardens and breaks in different places, often causing intermittent faults).

If the wires and plugs seem OK, then check power supplies and earth connections.