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3 red flashes

3 red flashes — Communication error

Wilo · VeroLine and VeroTwin Pumps

What does 3 red flashes mean?

Three consecutive red flashes of the LED typically indicate a communication error between system components.

Common Causes

  • Interrupted communication signal.
  • Faulty wiring or connection.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check all cable connections related to communication.

  2. 2

    Restart the system.

  3. 3

    If the flashing continues, contact customer service.

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

Related Faults

6.0.0.0 flashes6.0.0.0 flashes — Ready to acknowledge error6.0.0.0 steady6.0.0.0 steady — Error acknowledgement countdown activeAmber blinkAmber blink — Standby or waiting status
Source: Wilo VeroLine and VeroTwin Pumps
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