text: <s>[INST] powerflex 400 heatsink overtemp fault Hi,We are getting a heatsink overtemp fault on our powerflex 400. The fans do NOT start turning when a start command is given. I replaced the fans and still no luck. I suspect there is some kind of power supply board that runs these fans. Does anybody know what part [/INST] I remember a Product Issue about these fans for PF400, try to see if your drive could be affected (a transistor inside the fan could become faulty for this issue, so also the replaced fan could be affected if it was manufactured in the period indicated in following technotes) Aid 57378 - Aid 58083 Aid 47655 contains spare parts list for PF400. Hope this helps. - fuzzy logic \\n </s>