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J

Over-heat of Resistor Module (ECM)

Fanuc · Macro B CNC Programming

¿Qué significa J ?

The Energy Charge Module's (ECM) Resistor Module has detected an over-heat condition via its built-in thermostat. This indicates excessive energy dissipation, possibly due to continuous regeneration, high ambient temperature, or a fault in the cooling of the resistor module, leading to potential damage.

Causas comunes

  • Resistor module (ECM) temperature exceeds its thermal limit P1-81.
  • Insufficient cooling for the resistor module (ECM).
  • Continuous high current through the resistor module causing overheating.
  • Faulty temperature sensor on the resistor module (ECM).

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Immediately stop the machine using the emergency stop button and open the external Main Circuit Contactor (MCC) of the Power supply.

  2. 2

    Check the ambient temperature around the Resistor Module (A06B-6158-H030); ensure it is within the specified operating range (0 to 55°C).

  3. 3

    Verify proper ventilation and airflow around the Resistor Module; clear any obstructions preventing heat dissipation.

  4. 4

    Inspect the Resistor Module for any dust or debris accumulation on its surface that could impede cooling efficiency.

  5. 5

    Review the machine's operational cycle to identify if prolonged or frequent regenerative braking is occurring, potentially exceeding the resistor's continuous power rating.

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Datos técnicos verificados. Última actualización: March 2026

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