Controller displays Fault Code 1682 – Low Battery Voltage; generator may fail to start or controller resets intermittently

Safety first: Disable automatic start. When working on DC circuits, avoid shorting battery terminals; use insulated tools and eye protection.

• Measure battery voltage: Use a multimeter at the battery posts. For a 12 V system, below ~12.0 V indicates a low state of charge. Charge the battery fully or replace if it fails a load test.
• Inspect connections: Clean corrosion from battery posts and cable lugs with a wire brush. Tighten all battery and ground connections, including the chassis ground strap.
• Check battery charger: With AC utility power present, measure output from the Cummins battery charger. It should provide a float voltage around 13.2–13.6 V (12 V system). If no output, check its AC supply fuse/breaker and replace the charger if failed.
• Parasitic loads: Ensure no unauthorized devices are connected to the generator’s DC system. The controller and charger are designed for continuous connection; additional loads can drain the battery.
• Reset: After correcting voltage issues, clear the fault and verify the controller remains powered and stable.