Cause : Safe torque off 2 comes when safe torque off function is active, ie. STO circuit 2 is broken. The STO function is a safety feature that helps prevent unexpected motor starts and ensures the motor shaft is not rotating when maintenance or repairs are being performed.

The fault code FA82 in your ABB ACS560 drive indicates a problem with the Safe torque off (STO) function. A FA82 error means the drive detected an issue with this safety mechanism.

1. Check safety circuit connections. 
2. Check the value of parameter 95.04 Control board supply.