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
Unplug all components currently connected to the SpeedNet connection socket.
- 2
Unplug all external sensors to isolate the short circuit.
Verified technical data. Last updated: March 2026
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Source: Fronius TPS i Welding Machine