E08
Aksa
Generator Output Overvoltage
Generator shuts down; controller displays E08 Overvoltage.
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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 Automatic Voltage Regulator (AVR), Incorrect AVR sensing wiring, Loose or broken voltage sensing leads, Incorrect AVR adjustment
How to Fix / Troubleshooting
Safety first: Isolate the generator from the load and utility before working on the alternator or AVR. High voltage is lethal.
- Inspect AVR connections: Open the alternator terminal box on the Aksa set and locate the AVR. Check all sensing and excitation wires for tightness and signs of overheating.
- Check sensing voltage: With the generator running (qualified personnel only), measure line voltage at the AVR sensing terminals and compare to output terminals. Correct any wiring errors.
- Adjust AVR: If the AVR has a voltage potentiometer, reduce the setting slightly and observe output voltage. Do not exceed the rated voltage on the nameplate.
- Replace AVR if unstable: If voltage fluctuates wildly or remains high despite adjustment, replace the AVR with the correct Aksa‑specified model.
- Re‑test under light load: After repair, run the generator with a small load and verify stable voltage before reconnecting full load.
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Repair Difficulty
Hard
4/5
Required Part
Automatic Voltage Regulator (AVR)
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