Charger shows E017 and refuses to start; may be associated with external control signals.

Context: Some ABB home chargers integrate with external meters or home energy management systems.

• Disable external control: Temporarily disable load management or external control in the ABB configuration to see if the charger operates normally in standalone mode.
• Inspect control wiring: Check low-voltage terminals used for external control (e.g., RS‑485, digital inputs) for loose or shorted wires.
• Check external device: Verify that the external meter or controller is powered, configured correctly, and not reporting its own errors.
• Interface test (technician): A technician can measure control signal levels and verify correct polarity and termination on RS‑485 lines.
• Replace interface board: If the external control interface on the charger is damaged, replace the communication/interface board as per ABB documentation.