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ErrorLib — Industrial Fault Code Library

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No Indicators Lit (Mains Fault)

Faulty Mains Socket/Plug

Fronius · TPS i Welding Machine

What does No Indicators Lit (Mains Fault) mean?

The welding machine's indicators remain unlit when the mains switch is engaged, pointing to a malfunction in the mains power supply components external to the device itself.

Common Causes

  • Mains socket is faulty.
  • Mains plug is faulty.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the faulty mains plug on the power cable.

  2. 2

    Attempt to plug the welding machine into a different, known-good mains socket.

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

Related Faults

Current limit exceeded!Current Limit ExceededExcessive Spatter (Contamination/Magnetism)Contaminated/Magnetically Charged SystemIrregular Wire Speed (Brake Force)High Braking Force
Source: Fronius TPS i Welding Machine
Open Manual (Page 260)Search more codes in this manual