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Flashing fault signal LED, Display shows alternating error code

Flashing fault LED — Fault requiring delayed action

Wilo · Control EC-Fire Pump

What does Flashing fault signal LED, Display shows alternating error code mean?

This indicates a fault that may lead to a system shutdown after a set time has elapsed. The fault signal LED will flash, and the error code will alternate with the main screen display.

Common Causes

  • A fault condition that allows for a delayed response or switch-off.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Note the error code displayed on the screen.

  2. 2

    Consult the manual for the specific error code to understand the nature of the fault.

  3. 3

    Address the underlying cause of the fault as indicated by the error code.

  4. 4

    Acknowledge the fault on the switchgear once the issue is resolved.

Browse all codes in this manual (14)
Verified technical data. Last updated: April 2026

Related Faults

1 red flash — 1 green flashAlternating red and green flashes — Pump failure detectedDisplay shows alternating error codeDisplay shows error code — Specific fault informationE006E006 — Rotating field error
Source: Wilo Control EC-Fire Pump
Open Manual (Page 40)Search more codes in this manual