Generator is running but ATS does not transfer load to generator

Safety first: Work inside ATS enclosures only if you are qualified. De‑energize circuits where possible and use PPE.

• Step 1 – Confirm generator output: Measure voltage and frequency at the generator output lugs. Ensure they are within ATS acceptance range.
• Step 2 – Check ATS status indicators: Many Multiquip‑compatible ATS units have LEDs or displays showing source availability. Confirm that the ATS recognizes generator power.
• Step 3 – Inspect ATS sensing fuses: Some ATS designs use small fuses for sensing circuits. Replace any blown fuses with the correct rating.
• Step 4 – Verify control wiring: Check the wiring between the generator controller and ATS (start/stop, ready, or permit‑to‑transfer signals). Repair any open circuits.
• Step 5 – Test ATS operation manually: If the ATS has a test or manual transfer function, use it to verify that the contactor operates. If it does not, the ATS coil or control board may need replacement.