Fault Code: FU104
Fault Description: Programmable Logic Interruption

Possible Causes:

1. FPGA malfunction (FU.104)

2. Abnormal communication handshake between FPGA and MCU (FU.100)

3. Internal operation timeout of the drive (FU.940)

Solution:
If the fault persists after multiple power cycles, it is recommended to replace the servo drive.