Over-heat of Resistor Module (ECM)

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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.

• 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).

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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.