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LL fault in INVT GD10 drive

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An LL fault in INVT GD10 drive indicates an Electronic Underload Fault. This means that the inverter's output current has fallen below a pre-set underload threshold.

Common Causes of LL Faults:

  1. Reduced Load:

    • The load connected to the motor may have decreased significantly or been removed entirely.
    • This can occur due to mechanical failures, process changes, or other factors.
  2. Incorrect Underload Threshold Setting:

    • The underload threshold may be set too low, causing frequent false alarms.
    • Check the drive's parameter settings and adjust the underload threshold as needed.
  3. Inverter Malfunction:

    • A fault in the inverter's internal circuitry can trigger an LL fault, even if the load is sufficient.

Troubleshooting Steps:

  1. Check the Load:

    • Verify that the load connected to the motor is appropriate and functioning correctly.
    • Ensure that the load is not significantly reduced or removed.
  2. Adjust Underload Threshold:

    • Consult the drive's manual to determine the correct underload threshold setting.
    • Adjust the setting to avoid false alarms.
  3. Inspect the Inverter:

    • Visually inspect the inverter for any signs of damage or overheating.
    • Check the connections and wiring for any loose or damaged components.
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