Kipor standby generator shows E15 and will not accept load from ATS

Safety first: High voltage is lethal. Only qualified electricians should work on three‑phase terminations and phase rotation.

• Step 1 – Verify phase connections: With generator off and locked out, open the alternator terminal box. Check that all three phase conductors (L1, L2, L3) and neutral are securely connected and not burnt.
• Step 2 – Test continuity: Use a meter to check continuity of each phase winding from the alternator to the output breaker. Repair or replace damaged cables.
• Step 3 – Check phase rotation: With the generator running no‑load, use a phase rotation meter at the output terminals. If rotation is incorrect relative to the ATS, swap any two phase conductors at the generator output (with power off) to correct rotation.
• Step 4 – Inspect phase monitor: If wiring and rotation are correct but E15 persists, the internal phase monitoring circuit or relay in the Kipor controller may be faulty and require replacement.