big denford triac problems

[mark35gun]

hi all, i have just purchased a denford triac fanuc m/c after many years on a bridgeport interact with hh tnc 151.
so to cut a long story short i got it with a rotary phase converter as i have not got 3 phase at home, but i will have it when i move the m/c into my premises when i am ready, so i started the m/c and messed around a little bit ran a programme for a short while all seemed ok, when i turned off the rotary converter the ammeter on it spiked to over an indicated 30amps, i switched everything off, but not before it fried the z axis amp and an input unit, so i managed to get two replacements from the bay this weekend and carefully fitted them, i checked the m/c before power on thoroughly and could find nothing obvious, so i powered the m/c again, the control turned on and came up with 4 errors one servo overload and ones for x,y,z, these boards showed a low voltage led lit, i was unable to clear these so i started fault finding, i caught the contactor overload reset button in the rotary convertor while the m/c was on and it immediately showed a pull of 30 amps and fried the z amp board i had just fitted and the x,y axis boards as well.
i cannot keep throwing money at it but do need a m/c of this nature, so now i will be into it for at least another £1200, does anyone know of a fanuc engineer who would visit to repair the m/c?
it really needs someone with more experience on repairing the control side than me, or do i sell it and cut my losses and replace it with another working triac?
any advice appreciated, as i am now starting to pull my hair out or what little i have left
the control is fanuc omb if that helps.
i now don't know whether there is a fault with the phase convertor or an unfound problem with the control although the rotary phase convertor output meters ok i think.
advice/help please anyone?
mark.