Hardware Overcurrent

¿Qué significa F12 ?

This fault indicates an excessive current condition detected by the drive's hardware. Potential causes include excessive motor load, incorrect DC boost settings, or excessively high DC brake voltage.

• Direct short circuit on the drive output terminals (U, V, W) or within the motor windings, causing an instantaneous current surge.
• Rapid acceleration or deceleration of a high inertia load without adequate ramp times (e.g., P003 [Accel Rate 1], P004 [Decel Rate 1]).
• Incorrect motor parameters or tuning settings (e.g., P010 [Boost] set too high) leading to excessive current during starting or load changes.
• Failure of the drive's internal IGBTs (Insulated Gate Bipolar Transistors) or output power stage components.
• Severe ground fault on the motor cable or within the motor itself that manifests as an instantaneous overcurrent.

Haga clic en los pasos para seguir su progreso.

1. 1

   Disconnect the motor cables (U, V, W) from the drive output terminals. Perform an insulation resistance test (megger) on the motor and motor cable between phases and to ground.

2. 2

   Verify drive parameters P003 [Accel Rate 1] and P004 [Decel Rate 1] are set appropriately for the load inertia, increasing them if necessary.

3. 3

   Check parameter P010 [Boost] and P030 [Motor FLA] for correct settings relative to the motor nameplate and application requirements.

4. 4

   Inspect the motor connections at the drive and motor terminal box for loose strands or accidental shorts between phases or to ground.

5. 5

   Temporarily disconnect the motor and cable from the drive and attempt a test run without a motor to diagnose if the fault is internal to the drive (only if manual permits).