Cause : Heat sink overheat comes when the heat sink overheats, the temperature sensor activates, and the converter output is stopped. The FIN signal can be output when the temperature becomes approximately 85% of the heat sink overheat protection operation temperature.

For the terminal used for the FIN signal output, assign the function by setting "10 (positive logic) or 110 (negative logic)" in Pr.11, Pr.12, and Pr.16 (Output terminal function selection). 

• Check for too high surrounding air temperature.
• Check for heat sink clogging.
• Check that the cooling fan is not stopped. (Check that "LA " is not displayed on the operation status 7- segment LED display of the converter.)