I can think of two possibilities.

One is that in early Ioniq 5 years some cars had a problem with an overheating chargeport. Originally, the car just shut off power. I'm not sure if that was the message displayed, though. There was a software update that reduced the current till it cooled off rather than stopping it entirely. It was a problem in US models, but I hadn't heard of it was happening in other countries wit different charge ports.

Another thought is that maybe your EVSE (what most people call the charger although the charger is in the car) is overheating and shutting off.

 

Thanks Jerry, I’ve had the car for a week and drives perfectly. My worry is does this potentially mean there’s a more significant problem with the car that may develop. I have 14 days from buying the car to return it and get my money back and wondering if I should do that before a bigger issue develops

 

The condition @JerryP described has to do with the ICCU updates, which there have been several software updates to address.

Being as you seem to be in the UK, I wouldn't think ambient temperatures would contribute to this as they do in many warmer climates, but the first update addressed charging stopping entirely when the port overheats. In the US, it is quite common for folks to use 40-48A home charging solutions, which of course would generate more heat than your 30A solution.

The fact that reducing charging speeds helped makes it more likely the patch has not been installed, it should be free from any Hyundai dealer. The patch merely temporarily slows charging to allow cooling to catch up, then resumes. Many of us have experienced this, and the patch certainly helps.

 

Try using a different L2 charger. I doubt if the car is the problem, but seeing if it has the same pattern on a different charging source will clearly show which way to turn next.

It might be helpful if you told us what EVSE you're using and if it's new used, or if you've been using it on other cars. It's pretty hard to troubleshoot without information.

 

Since UK & EU use a different port, I wasn't sure they'd have the same overheating problem, especially at 30 amps. But I can't rule it out. Try another charger and if it does the same thing there, then, it's dealer time. In fact, it would be good to check to make sure all the updates have been done and the recalls. I imagine the recalls need to be done before the dealer can sell the car, but it's best to be sure.

 

If it's like in the States (and IIRC), all recalls must be completed prior to sale if the vehicle is sold at a dealership that's branded the same as the vehicle. Third-party dealerships do not have the same restrictions.

 

Just spoken to the people I bought the car from and they are going to arrange for it to be examined at the local Hyundai dealership so hopefully they will come up with an answer. Thanks for your advice jerry

 

I'd still try another charging spot in the meantime. Or plug another car into your charger.

 

My 2021 I5 recently stopped charging after a short time on a home 7kW charge point. Hyundai garage diagnosed my Hyundai original charging cable, which only has a 2-year warranty. Replaced charging cable, and all seems to be well. I'm in UK so port is Type 2 (Mennekes). FYI, this socket also allows charging on 240V 3-phase AC, which J1772 and NACS don't appear to do.