text: <s>[INST] 1336 over temp Hello all,I do not have much experience with this series drive, thought I would see if there were similar experiences out there. The drive is a 1336 PLUS II 1336F-B040. The drive overheats when the amps are over 27amp for more than 10 min. The drive is located in an MCC section on the second floor of our warehouse. The temperature varies and the environment is very dusty. This VFD is used for a crusher. While the environment is not perfect, the drive has functioned for several years before we started having this problem. Thanks a bunch [/INST] Hi, this fault comes when heat sink temperature exceeds a predefined value of 90° C Your drive is rated for nominal current higher then the one you have, so you have to check other things... Check for blocked or dirty heat sink fins. Check that the ambient temperature has not exceeded 40° C (104° F). Check fan. Maybe the dust has made some problems there.... take also a look to the User Manual App. A to see the derating curves of this drive. Hope this helps… - fuzzy logic \\n </s>