No Indicators Lit (24V Short)

24V SpeedNet/Sensor Short Circuit

Fronius · TPS i Welding Machine

What does No Indicators Lit (24V Short) mean?

The welding machine's indicators are not lit, suggesting a short circuit on the 24V supply that powers the SpeedNet connection socket or an external sensor, preventing normal operation.

Common Causes

  • Short circuit on the 24V supply of the SpeedNet connection socket.
  • Short circuit on an external sensor connected to the 24V supply.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Unplug all components currently connected to the SpeedNet connection socket.

  2. 2

    Unplug all external sensors to isolate the short circuit.

Browse all codes in this manual (34)
Verified technical data. Last updated: March 2026

Related Faults

Source: Fronius TPS i Welding Machine