E090 — Plausibility error

What does E090 mean?

The system has detected an implausible situation where the pump started but no volume flow was detected within 10 seconds. This suggests an issue with the pump's delivery function or the flow sensor.

• Pump is not delivering water correctly
• Flow switch or flow sensor is not working correctly

Click steps to track your progress.

1. 1

   Check the pump to ensure it is functioning and delivering water.

2. 2

   Verify that the flow switch or flow sensor is correctly installed and operational.

3. 3

   Ensure the system has sufficient water to create flow.

4. 4

   Acknowledge the fault on the switchgear after confirming the function.