Leakage Inductance Fault

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Auto-tuning did not finish within the set time, or the tuning result for leakage inductance fell outside the parameter setting range. This typically points to issues with motor wiring, preventing the drive from accurately determining motor inductance.

• Incorrect motor wiring or an open circuit in one or more motor phases, preventing accurate leakage inductance measurement.
• Motor not connected or a faulty connection between the drive output terminals (U/T1, V/T2, W/T3) and the motor.
• High resistance or poor contact at the motor terminal block or drive output terminals, affecting impedance calculations.
• Incorrect motor nameplate data (e.g., motor rated current P2-01, motor rated voltage P2-02) entered, leading to erroneous tuning calculations.
• Motor internal winding fault (e.g., inter-turn short) affecting leakage inductance characteristics.

Klikk på steg for å spore fremgangen.

1. 1

   1. Verify all motor nameplate data (rated current, voltage, frequency) against drive parameters (P2-01, P2-02, P2-04). Correct any discrepancies.

2. 2

   2. Inspect and tighten connections at the drive output terminals (U/T1, V/T2, W/T3) and motor terminal box. Check for corrosion or loose strands.

3. 3

   3. Ensure the motor is physically disconnected from any mechanical load during the auto-tuning process.

4. 4

   4. With motor disconnected, measure inductance between motor phases (U-V, V-W, W-U) using an LCR meter, if available. Values should be balanced within 5%.

5. 5

   5. Re-run auto-tuning (e.g., using parameter H3-02 = 1 or 2). If the fault persists, consider a factory reset (A1-03 = 2220) and re-enter parameters.