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E009

E009 — Turbine operation warning

Wilo · Wilo-Stratos GIGA Pumps

What does E009 mean?

Warning: The flow is driving the pump impeller, feeding electrical current back to the mains. Check settings and system operation. Prolonged operation can cause damage.

Common Causes

  • Flow driving the pump impeller
  • Incorrect system settings
  • Electrical current feedback to mains

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the pump's settings for correct configuration.

  2. 2

    Verify the system for proper operation and ensure flow is not abnormally high.

  3. 3

    Caution: Continued operation can damage the module.

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 54)Search more codes in this manual