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Hello tbedford Small amounts of moisture will freeze up an EPR AT -22f evap temp; been there done that; break out the torch, free it up then do a complete oil and drier change.

More than likely if your EPR's are not working correctly you could have moisture in the system making the pistons freeze up. Check the pressure drop across the LL drier, should not see more than 1# of pressure drop' anymore than that I would change out the LL driers. Also I would go ahead and...

I did have the electrician look at it that is why I am not sure he is correct, but you will get those readings on corner grounded delta transformer, but even if you take off the load at the distribution panel the leg of the transformer should still be grounded and reading 0v to ground not 208v...

Ok let me elaborate a little further. I am a refrigeration tech not an electrician. Here is what I saw. On the phases A-B=208v A-C=208v C-B=208v. A to ground 208v, B to ground 208v, C to ground 0v. This is seen when there is a load. Take off the load, and have 208v to ground on all three legs...

Can someone explain why on a 3 phase delta transformer (460/208) on the load side that 1 of the phases if you check it to ground does not show 208V but the other 2 phases do. But if you take off the load you get 208 to ground and if you check phase to phase it shows 208v. I was told it was...