Ryobi
Main Breaker Open or Transfer Switch Not Engaging
Generator runs but produces no power to the house and no specific error code is shown.
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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
Generator main breaker tripped, ATS contactor failure, Loose output wiring at generator lugs, Incorrect ATS wiring configuration
How to Fix / Troubleshooting
Safety first: Turn the generator OFF and disable AUTO. Only qualified persons should open the ATS or work near live terminals.
- Check generator main breaker: Open the generator access panel and verify the main output breaker is ON. If tripped, reset once. If it trips again, stop and investigate for shorts.
- Inspect output lugs: With power off and locked out, check that the output cables at the generator lugs are tight and not burned.
- Observe ATS operation: During a test (qualified persons only), watch the ATS to see if the contactor moves to the generator position. If it does not, the ATS coil or control circuit may be faulty.
- Professional diagnosis: If the generator is producing voltage at its lugs but the house is not receiving power, an electrician should test and repair the ATS.
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Repair Difficulty
Professional Required
5/5
Required Part
Generator Main Circuit Breaker
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