It really seems like its a power problem to me - can you get a tester to make sure you're getting 220 from those? Alternatively, you could try with a switching PSU and see what happens.
Thanks, will confirm it's 220v.
Should the AUC3 converter show up in the cgminer status regardless of whether a connected miner has enough power? Or are you saying it's a power issue for the converter that's causing it to not show up in the cgminer status?
Edit: tried two other PSUs and I have just updated the OP to include that
