No Welding Current (Limited Cooling Air)

Limited Cooling Air Supply

Fronius · TPS i Welding Machine

What does No Welding Current (Limited Cooling Air) mean?

The welding machine indicates overtemperature and fails to produce welding current, which is a symptom of insufficient cooling. This can occur if the airflow to the internal components is restricted.

Common Causes

  • Limited supply of cooling air to the welding machine.
  • Cooling air ducts are obstructed.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect all cooling air ducts for blockages and ensure they are fully accessible.

  2. 2

    Verify that there is sufficient clearance (e.g., 0.5 m / 1 ft. 8 in.) around the device for proper airflow.

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Verified technical data. Last updated: March 2026

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Source: Fronius TPS i Welding Machine