I went into the local Kia service center to chat about used EV prices. Noticed this.

This is a car having its OBC replaced. The OBC has been taken out.
It normally sits between the High Voltage Junction Box (the part lifted up and to the side) and the EPCU
So the Charging Fault Error is happening here too now.
The service guy said they have had a few recently.
The car being fixed was from July 2014 with 18,000km on the clock
The old OBC had this sticker on it

And the new one

The OBC is made by a company called Mando in Korea. We think the new version has a new control unit that fixes the problem.
More info about the OBC

Here is the OBC taken out of the car.

Looking at photos 2 and 3 you can work out the mfg date of the OBC from the sticker on the side.
14F23 is 23rd June 2014 and 16B05 is 5th Feb 2016
This sticker is visible at the back of the motor unit without taking anything apart.
In picture 5 - the Mando sticker would be on the left behind the orange power outlet. (You can't see it in this pic)
The info sticker seen in photo 4 is only visible when the car is disassembled.
There is a 3rd Daewoo Electronics sticker visible at the front of the motor unit without taking anything apart.
In picture 5 - the Daewoo sticker would be on the right. (You can't see it in this pic)
The codes for using Torque Pro can be found by clicking the link in the website icon under my user name on the left.