Controller displays Fault Code 1150 – Fuel Level Low (if tank sender connected); generator may not start or may shut down

Safety first: Disable automatic start. For diesel, avoid open flames; for gas, ensure area is ventilated.

• Verify fuel level: Physically check the fuel tank or day tank gauge. Refill with the correct fuel if low.
• Sender inspection: Locate the fuel level sender on the tank. Inspect wiring and connector for corrosion or damage.
• Sender test: If possible, measure sender resistance and compare to Cummins specifications. Replace the sender if readings are out of range.
• Calibration: Some controllers allow sender calibration; verify settings match the installed sender type.
• Reset: After correcting fuel level or sender issues, clear the fault and confirm proper level indication.