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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

751

Time lost

Fronius · Solar Energy

What does 751 mean?

The inverter's internal clock has lost its time setting, resulting in inaccurate timestamps. A warning message is shown on the display.

Common Causes

  • Loss of internal clock power source (e.g., battery, capacitor)
  • Real Time Clock (RTC) module malfunction

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reset the time and date on the inverter

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

1Hardware fault102AC voltage too high103AC voltage too low
Source: Fronius Solar Energy
Open Manual (Page 129)Search more codes in this manual