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tnF

Auto-Tuning Fault

Schneider Electric · ALTIVAR 28 Variable Speed Drive

Hva betyr tnF ?

This fault occurs during the auto-tuning process, signifying an incompatibility with the connected motor, such as a special motor type or incorrect power sizing relative to the drive. This prevents the drive from accurately optimizing its control parameters, leading to suboptimal performance.

Vanlige årsaker

  • Motor nameplate data (Voltage, Current, RPM, kW/HP) entered into drive parameters (P0-03 to P0-06) does not match the actual motor.
  • Special motor type (e.g., servo motor, permanent magnet motor) not supported by the drive's auto-tuning algorithm.
  • Motor size (kW/HP) significantly mismatched with the drive's rated output power.
  • Motor not physically connected or connections are loose/intermittent during the tuning process.
  • Mechanical load connected during static auto-tuning, preventing accurate rotor resistance measurement.

Reparasjonssteg & Sjekkliste

Klikk på steg for å spore fremgangen.

  1. 1

    1. Verify all motor nameplate data (Voltage, Current, Frequency, RPM, kW/HP) is accurately entered into drive parameters (e.g., P0-03, P0-04, P0-05, P0-06).

  2. 2

    2. Ensure motor U, V, W terminals are securely connected to the drive output.

  3. 3

    3. Disconnect the motor from any mechanical load before initiating static auto-tuning.

  4. 4

    4. Check motor winding continuity and resistance (U-V, V-W, W-U) with a multimeter; values should be balanced.

  5. 5

    5. Confirm the motor type (e.g., induction, PMAC) is compatible with the drive's auto-tuning capabilities as per drive manual.

Se alle koder i denne manualen (13)
Verifisert teknisk data. Sist oppdatert: March 2026

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Kilde: Schneider Electric ALTIVAR 28 Variable Speed Drive