Control Board Failure
Eaton
Generator Control PCB Malfunction
Controller displays “Control Board Failure”, “Internal Fault”, or is completely blank/unresponsive while battery voltage is normal.
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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
Failed microprocessor or power supply on Eaton controller PCB, Surge damage from lightning or utility transients, Corroded or loose multi-pin harness connectors, Internal short due to moisture ingress
How to Fix / Troubleshooting
Safety first: Turn generator OFF, disconnect battery negative, and open the main AC breaker. Static-sensitive components require care.
Steps:
- Check display power: Confirm battery voltage at the controller power input terminals. If absent, trace wiring and fuses back to the battery.
- Inspect connectors: Remove and reseat all multi-pin harness connectors on the control board, checking for bent pins or corrosion.
- Look for damage: Examine the PCB for burn marks, swollen components, or water damage. If present, the board must be replaced.
- Replace controller: Order the exact Eaton replacement control board for your model. Transfer any configuration jumpers and reprogram settings per the installation manual.
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Repair Difficulty
Professional Required
5/5
Required Part
Generator Control Board
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