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What is an TJF fault on the ATV61 and ATV71 drives?
Altivar ATV61 and ATV71
TJF means IGBT overheating caused by drive overheating
This fault appears when the estimated temperature of an IGBT is too high. It is a calculated measure based on the switching frequency, drive output frequency and motor current.
Check the size of the load, motor and drive.
Reduce the switching frequency in menu 1.4
Wait for the motor to cool before trying to restart the drive.