Charger reports E03 and refuses to start charging; often logged as phase failure or phase imbalance in the app.

Safety: Work on live three-phase circuits only if you are qualified. Otherwise, call an electrician.

• Check upstream breakers: In the main panel, verify that all three-phase breakers feeding the charger are ON and mechanically linked. Reset any tripped breaker.
• Inspect phase wiring: With power OFF, open the go-e Charger and confirm that L1, L2, and L3 are all securely clamped in the terminal block. Tug gently on each conductor to ensure it is firmly seated.
• Measure phase voltages: With power ON, measure L1–N, L2–N, L3–N and L1–L2–L3. Any missing or significantly low reading indicates a supply issue that must be corrected at the distribution board.
• Test internal relays: Start a charging session while monitoring voltage at the charger output (to the vehicle connector). If one phase does not switch through, the internal contactor/relay for that phase may be defective and the power board or relay module must be replaced.
• Reconfigure to single-phase (temporary): If allowed by the model, you can temporarily configure the charger to single-phase operation in the app until a full repair is done.