User-Defined Fault #1 / Fan Loss (Model Specific)

What does 35 mean?

For X5 AC Drives, this fault is user-configurable (User Flt 1), indicating a condition defined by the system integrator or user as a critical error. The specific cause depends entirely on the application's programming. For X4 AC Drives, this fault signifies a 'Fan Loss', indicating a problem with the heat sink or internal cooling fan, which could lead to overheating if unresolved.