Controller displays F17 Fuel Level Low; generator may still run but alarms and may be configured to shut down.

Safety first: For diesel units, avoid open flames and sparks near the fuel tank. For gas units with external tanks, follow all fuel supplier safety guidelines.

• Verify fuel level: Physically check the fuel tank gauge or dip the tank (if permitted) to confirm actual fuel level. Refill the tank if low, following Siemens and local regulations.
• Inspect level sender: Locate the fuel level sender on the tank top. Check the electrical connector and wiring harness for damage or corrosion.
• Test sender resistance: Disconnect the sender and measure resistance while moving the float arm (if accessible). Compare readings to the Siemens specification. Replace the sender if readings are erratic or open.
• Check controller calibration: In the controller menu, verify that the fuel level input is configured for the correct sender type (e.g., 0–90 Ω). Incorrect calibration can cause false F17 alarms.
• Retest: After repair, clear F17 and monitor the displayed fuel level for stability.