Charger shows E15; app may indicate load management or external control error.

Safety: De-energize control wiring circuits before modifying connections.

• Check wiring: Verify that A/B (or +/–) lines from the external meter or controller are correctly connected to the go-e RS-485 or control terminals, observing polarity.
• Verify settings: In the go-e app or web interface, confirm that the correct meter type, Modbus address, and communication parameters are configured.
• Test bus integrity: Use a Modbus tester or connect a known-good device to confirm that the external meter is responding. Replace damaged cables or terminations.
• Isolate the charger: Temporarily disable external load management in the settings. If the error clears and charging works, the issue is external to the charger.
• Inspect control board: If communication fails with known-good wiring and devices, the load management interface on the control board may be defective and require replacement.