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H11

Internal controller temperature sensor error

Lenze · 9300 Series

Was bedeutet H11 ?

The sensor for detecting the internal temperature of the controller is indicating undefined values. This prevents accurate monitoring of the internal component temperature, risking damage from overheating.

Häufige Ursachen

  • Failure of the internal control board temperature sensor, sending an invalid signal.
  • Intermittent connection or damage to the sensor on the control board due to vibration or manufacturing defect.
  • Corruption of the analog-to-digital converter (ADC) or processing logic on the control board responsible for reading the sensor.
  • Excessive internal heat buildup in the enclosure leading to sensor malfunction or damage, even if the heatsink is cool.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Power cycle the drive (disconnect mains, wait 5 minutes) to reset the internal monitoring circuits.

  2. 2

    Ensure the ambient temperature around the drive is within the specified operating limits (e.g., 0-50°C) as per the datasheet.

  3. 3

    Inspect the control board for any visible damage or signs of overheating, particularly around the temperature sensor component (often a small SMD thermistor).

  4. 4

    Check all internal ribbon cables and connectors on the control board for proper seating and connection.

  5. 5

    If applicable, use diagnostic software to view the raw internal temperature sensor value; if it's constantly at an extreme (e.g., -40°C or +150°C), the sensor is likely faulty.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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