Aksa ATS / Auto Transfer Failure

Generator fails to transfer load automatically during a mains failure, but can be started manually.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Faulty ATS control wiring, Stuck ATS contactor, Incorrect controller mode (Manual only), Failed ATS coil

Safety first: De‑energize both mains and generator before opening the ATS.

Check controller mode: Ensure the Aksa controller is in AUTO mode and that auto start is enabled.
Simulate mains failure: With supervision, remove mains sensing and observe if the generator starts and ATS receives a transfer signal.
Inspect ATS mechanism: Manually operate the ATS handle (if provided) to ensure it moves freely.
Test ATS coil: Measure coil voltage when transfer is commanded. Replace the coil or contactor if it does not operate.

Hard 4/5

Automatic Transfer Switch Contactor

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