Volvo Penta
Load Transfer Failure
Generator starts automatically but does not transfer load; ATS remains on mains or in neutral position.
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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 sensing incorrect generator voltage/frequency, Mechanical jam in ATS mechanism, Interlock or permissive signal not satisfied, Incorrect ATS configuration
How to Fix / Troubleshooting
Safety: Never force an ATS manually under load without following manufacturer procedures.
- Verify generator output: Confirm correct voltage and frequency at the ATS generator terminals.
- Check ATS status indicators: Many ATS units show why transfer is inhibited (e.g., undervoltage, phase rotation). Correct any generator-side issues.
- Inspect mechanical operation: With power isolated, inspect the ATS mechanism for binding, corrosion, or broken parts. Lubricate per manufacturer instructions.
- Review settings: Check ATS pickup and dropout settings and ensure they match the generator's ratings. Adjust if necessary.
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Repair Difficulty
Hard
4/5
Required Part
Automatic Transfer Switch (ATS)
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