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E033

E033 — Intermediate circuit overvoltage

Wilo · Wilo-Stratos GIGA Pumps

What does E033 mean?

The voltage in the pump's intermediate circuit is too high. This may indicate voltage fluctuations in the mains supply.

Common Causes

  • Voltage fluctuations in the mains supply
  • Electrical installation issues

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the main power supply voltage.

  2. 2

    Inspect the electrical installation for any faults or overvoltage protection.

  3. 3

    Ensure the pump is not connected to a power source with excessively high voltage.

Browse all codes in this manual (40)
Verified technical data. Last updated: April 2026

Related Faults

3 red flashes3 red flashes — Communication errorE.025E.025 — General error codeE000E000 — System OK / No error
Source: Wilo-Stratos GIGA Pumps
Open Manual (Page 55)Search more codes in this manual