Torque/Current Limitation Fault

What does SSF mean?

A torque/current limitation detected fault. This indicates that the drive's output torque or current has hit its predefined limit, typically due to an overload condition or an attempt to accelerate too quickly. While a protection feature, persistent limitation can indicate an undersized system or mechanical issue.

• Motor attempting to accelerate a load beyond its current or torque rating (e.g., Parameter P1-05 exceeded).
• Mechanical jamming, excessive friction, or obstruction in the driven equipment.
• Incorrect motor parameters programmed into the drive, causing miscalculation of torque/current limits.
• Drive output current limit (e.g., P1-05, P1-06) set too low for the application's actual load.

Click steps to track your progress.

1. 1

   1. Monitor the drive's output current (e.g., display parameter d0-02) and compare it to the motor's rated current.

2. 2

   2. Inspect the mechanical system for binding, excessive friction, or obstructions preventing free movement.

3. 3

   3. Verify motor nameplate data (e.g., rated current, voltage) against the drive's programmed motor parameters (P0-01 to P0-10).

4. 4

   4. Temporarily increase the drive's current limit (e.g., P1-05) by a small increment to see if the fault clears (use with caution).

5. 5

   5. Use a clamp-on ammeter to measure actual motor phase currents and compare them to the drive's internal measurement.