Hi all, I have been lurking on these forums for a while now, and now have a valid tech question. I look after 12 TCM FB15-7 trucks with AC drive motors. One truck has blown two inverters, one about two months ago, and the other this week(controller has 3 seperate inverters). I have had the motor out and tested but it came back with a clean bill of health, does anyone have any ideas, as its costing £3,500 each time this happens!