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E099

E099 — Impermissible combinatorics (Pump type)

Wilo · VeroLine and VeroTwin Pumps

What does E099 mean?

This error indicates that different types of pumps have been interconnected, which is not allowed.

Common Causes

  • Mixing incompatible pump types in a system.
  • Incorrect system configuration.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that all pumps connected in the system are of compatible types.

  2. 2

    Consult the installation manual for correct pump combinations.

  3. 3

    Contact customer service if you are unsure about compatibility.

Browse all codes in this manual (45)
Verified technical data. Last updated: April 2026

Related Faults

3 red flashes3 red flashes — Communication error6.0.0.0 flashes6.0.0.0 flashes — Ready to acknowledge error6.0.0.0 steady6.0.0.0 steady — Error acknowledgement countdown active
Source: Wilo VeroLine and VeroTwin Pumps
Open Manual (Page 52)Search more codes in this manual