Generator is running but does not take load; ATS remains on mains even though mains is present and within limits.

Safety: Isolate generator and ATS control power. Verify no backfeed from mains before working on the breaker.

• Check manual lock: Ensure any mechanical lock or padlock on the generator breaker is removed.
• Operate breaker manually: With power off, operate the breaker handle to confirm smooth movement. Stiff or jammed mechanisms may require cleaning or replacement.
• Test closing coil: Measure coil resistance and apply rated control voltage to verify operation. Replace the coil if it does not actuate.
• Inspect control wiring: Check the wiring from the Himoinsa controller to the breaker coil for continuity and tight connections.
• Functional test: Restore power and perform a start/transfer test to confirm the breaker closes correctly.