Emaux pump intermittently stops with E11, especially when external automation is controlling it.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off both the pump breaker and the automation system power before working on control wiring.
- Verify compatibility: Confirm that the external controller (e.g., Emaux or third-party automation) is approved for use with your specific Emaux pump model and that the control mode (dry contact, RS‑485, analog) is correctly configured.
- Check wiring: Inspect the low-voltage control terminals on the pump and controller. Tighten all screws and ensure wires are in the correct terminals as per both manuals.
- Test in standalone mode: Temporarily disconnect the external control wiring and run the pump using its onboard keypad. If E11 disappears, the issue is with the external control system.
- Shielded cable: For RS‑485 communication, use shielded twisted pair cable and ensure the shield is grounded at one end only to reduce interference.
If E11 persists even in standalone mode, the pump’s control PCB may have a communication circuit fault and should be inspected by a technician.
Repair Difficulty
Required Part
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