I am in the USA but I do not believe the unit was intended for the USA when manufactured because of the cord it came with. There is a shortage here in the USA for this product. My unit serial number starts with 2036714
The workstation I am replacing has a HX750i. That machine is 4 years old. I took out the HX750i and put that into the new build I am doing and it boots just fine. There is obviously an issue with the HX1200i. I will be contacting corsair on Monday.
Putting together a new workstation and my Hx1200i also trips exactly like yours. My unit shipped from china but it seems that when it was manufactured it was not intended for the USA. The cord that came with it had a different plug.