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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.

11

Check Mains Voltage

Fronius · Perfect Charging

What does 11 mean?

The system indicates a need to check the incoming mains voltage. This suggests the input power supply to the battery charger may be outside its operating specifications or unstable, preventing proper operation or charging.

Common Causes

  • Input mains voltage is too low for the charger's operating range.
  • Input mains voltage is too high for the charger's operating range.
  • Instability or significant fluctuations in the mains power supply.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Measure the incoming mains voltage at the charger's input terminals using a multimeter.

  2. 2

    Compare the measured mains voltage against the nominal voltage and tolerance specifications of the device.

Browse all codes in this manual (61)
Verified technical data. Last updated: April 2026

Related Faults

101Gateway CAN Connect Timeout102Gateway No Back-end Connection103Gateway Charger/Registration Mismatch
Source: Fronius Perfect Charging
Open Manual (Page 49)Search more codes in this manual