I charge my Roadster with the UMC 240 and 16 A. Today when I connected the car it did not change from white to blue light. Suddenly, after about 60 sec. it changed and started charging. Then after one hour I went to the garage and the car made a noise. It was like loud noise coming from the rear fans. Never heard a noise like this on the car. I stopped charging manually on the screen and the noise went slowly away. When I attempted to start charging again with the UMC the light stayed white and the screen said: "Waiting...." I connected and disconnected opened and closed shut down and on looked after the fuses. Butt it did not want to start charging again. Then I took my mobile connector put it on 10 A, and now it charges immediately. Tha fans are working but not so loud. What is the problem? Two problems? Or is the UMC broken and made the car behave strangely?