Red collective fault LED lit and buzzer sounds — System fault detected

What does Red LED solid, Buzzer active, Display shows alternating error code mean?

A serious fault has occurred in the system. The red collective fault LED will light up, and an acoustic alarm will sound via the internal buzzer. The specific error code will alternate with the main screen display.

• A general fault has occurred that requires attention.

Click steps to track your progress.

1. 1

   Press the operating button once to suppress the acoustic alarm and alternating display temporarily.

2. 2

   Read the specific error code shown on the display (e.g., E006, E022.x, etc.).

3. 3

   Refer to the specific error code in the manual to understand the cause and recommended remedy.

4. 4

   If the fault cannot be resolved, contact Wilo customer service.