Generator runs but controller shows E14 and will not transfer load

Safety first: Isolate generator and mains. Only a qualified electrician should work on three-phase power circuits.

• Check output terminals: Open the Hyundai generator output terminal box. Inspect L1, L2, L3, and N connections for tightness and signs of overheating. Tighten as needed.
• Measure phase voltages: With the generator running and main breaker closed (but ATS isolated), measure L1-L2, L2-L3, and L3-L1 voltages. They should be balanced and within specification. If one phase is missing, suspect alternator winding or connection fault.
• Verify phase rotation: Use a phase rotation meter to confirm correct sequence (e.g., L1-L2-L3). If rotation is wrong, swap any two phases at the alternator output (only if permitted by Hyundai documentation and local codes).
• Controller inputs: Inspect the phase sensing wires from the alternator to the controller. Repair any damaged wiring. If E14 persists with correct voltages and rotation, the controller's phase monitoring circuit may be defective.