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F30035

Power unit: Air intake overtemperature

Siemens · SINAMICS G120C Variable Speed Drive

¿Qué significa F30035 ?

The air intake temperature in the power unit has exceeded the permissible limit, typically 55 °C. This condition signifies critical overheating of the incoming air, often caused by high ambient temperatures, insufficient airflow, or a fan failure. This fault forces an OFF1 or OFF2 reaction, stopping the drive, and cannot be acknowledged until the temperature falls below the alarm threshold of A05002.

Causas comunes

  • Control cabinet ventilation system malfunction (e.g., fan failure, blocked exhaust vents, clogged air filters).
  • Ambient room temperature consistently exceeding the drive's absolute maximum operating temperature (e.g., >55°C).
  • Recirculation of hot exhaust air from the cabinet or nearby equipment back into the drive's air intake.
  • Incorrect drive mounting orientation preventing proper natural convection or forcing air against the cooling design.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Measure the air intake temperature directly at the drive using a thermal sensor or calibrated thermometer.

  2. 2

    Verify the operation of all control cabinet cooling fans and clean any clogged air filter mats.

  3. 3

    Check for obstructions in the cabinet's exhaust path, ensuring hot air can escape freely.

  4. 4

    Monitor the control cabinet's internal temperature and external ambient temperature over time using data loggers.

  5. 5

    Review the drive's installation manual for correct mounting clearances and ambient temperature specifications.

Ver todos los códigos en este manual (34)
Datos técnicos verificados. Última actualización: March 2026

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Fuente: Siemens SINAMICS G120C Variable Speed Drive