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E050

E050 — BMS communication time-out

Wilo · VeroLine and VeroTwin Pumps

What does E050 mean?

Communication between the pump and the Building Management System (BMS) has been interrupted or has taken too long.

Common Causes

  • Bus communication is interrupted.
  • Cable connection to the BMS is faulty or loose.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the cable connection between the pump and the BMS.

  2. 2

    Ensure the BMS is functioning correctly.

  3. 3

    Restart both the pump and the BMS system.

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 51)Search more codes in this manual