Gillette
Automatic Start/Transfer Failure
Generator fails to start automatically during a utility power outage, but starts manually at the generator.
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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
Faulty ATS start signal contacts, Broken start signal wiring, Incorrect controller auto mode setting, Utility sensing misconfigured
How to Fix / Troubleshooting
Safety first: Work with a licensed electrician when opening the ATS. De-energize control circuits when possible.
Steps:
- Controller mode: Verify the Gillette controller is set to AUTO, not OFF or MANUAL.
- ATS start signal: At the generator control panel, locate the remote start terminals from the ATS. Simulate a start signal (jumper per wiring diagram) to see if the generator starts. If it does, the issue is in the ATS or wiring.
- Check ATS contacts: In the ATS, inspect the dry contacts that close to send the start signal. Replace if burned or not operating.
- Utility sensing: Confirm that the ATS senses utility loss correctly and that voltage sensing settings match the utility supply.
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Repair Difficulty
Hard
4/5
Required Part
ATS Start Signal Relay
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