FG Wilson
Automatic Transfer Failure
Generator will not switch load automatically during mains failure, but runs in manual
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Safety Warning
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.
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Possible Causes
ATS control circuit fault, Incorrect ATS control wiring from generator, Failed ATS coil or mechanism, Controller auto mode disabled or misconfigured
How to Fix / Troubleshooting
Safety first: Only qualified personnel should work on ATS equipment. Isolate sources as required.
- Verify controller mode: Ensure the FG Wilson controller is in AUTO and that remote start/stop is enabled.
- Simulate mains failure: Under controlled conditions, remove mains sensing and observe if the generator starts and ATS receives a transfer signal.
- Check ATS control wiring: Confirm that the generator's transfer command contacts are correctly wired to the ATS coil/control terminals.
- Inspect ATS mechanism: Listen for coil operation when transfer is commanded. If silent, test coil voltage and replace coil or mechanism as needed.
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Repair Difficulty
Hard
4/5
Required Part
Automatic Transfer Switch (ATS) Coil
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