Overheat at Control Side

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This alarm indicates that an overheating condition has been detected on the control side of the Fanuc Series 20 CNC, typically within the main CNC unit or one of its critical control boards. This can be caused by inadequate cooling or excessive internal heat generation, posing a risk to electronic components.

• Malfunctioning or blocked cooling fan(s) in the CNC cabinet or specific control modules.
• Obstructed ventilation ports on the CNC unit or electrical cabinet.
• High ambient temperature in the machine's operating environment.
• Excessive load on CNC components leading to increased heat generation.
• Faulty temperature sensor or detection circuit.

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1. 1

   Inspect all cooling fans within the CNC cabinet and on specific control modules (e.g., CPU board, power supply unit) for proper operation and blockages.

2. 2

   Clean all ventilation ports, air filters, and heat sinks to ensure unrestricted airflow into and out of the CNC unit.

3. 3

   Verify that the ambient temperature around the CNC is within the manufacturer's specified operating range.

4. 4

   Reduce machine load or cycle time if continuous heavy operation is causing excessive heat buildup.

5. 5

   If the alarm persists after cooling checks, investigate the temperature sensor and associated circuitry for faults.