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E05

E05 - Overvoltage detected

Wilo · Yonos PICO Pumps

What does E05 mean?

The LED display shows E05, indicating that the power supply voltage to the pump is too high. The pump may switch off.

Common Causes

  • High mains voltage detected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the mains voltage supply.

  2. 2

    Ensure the power supply is within the pump's specified operating range.

  3. 3

    Consult a qualified electrician if the voltage remains high.

Browse all codes in this manual (17)
Verified technical data. Last updated: April 2026

Related Faults

Bars bottom to top blinkBars bottom to top blink - Pump venting function activeBuilding does not get warmBuilding does not get warm - Heating output too lowE04E04 - Undervoltage detected
Source: Wilo Yonos PICO Pumps
Open Manual (Page 20)Search more codes in this manual