Over-heat of Resistor Module (ECM)
Fanuc · Macro B CNC Programming
What does J mean?
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.
Repair Steps
- 1
Immediately stop the machine using the emergency stop button and open the external Main Circuit Contactor (MCC) of the Power supply.
- 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
Verify proper ventilation and airflow around the Resistor Module; clear any obstructions preventing heat dissipation.
- 4
Inspect the Resistor Module for any dust or debris accumulation on its surface that could impede cooling efficiency.
- 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.