Controller displays F19 Intake Air Temperature High; generator may derate or shut down.

Safety first: Shut down the generator and allow it to cool. Exhaust components remain hot for a long time after shutdown.

• Inspect ventilation: Ensure that all Siemens-specified clearances around the generator enclosure are maintained. Remove any objects blocking air inlets or outlets.
• Check for exhaust recirculation: Verify that exhaust discharge is directed away from the intake louvers and that wind or structures are not causing hot exhaust to be drawn back into the unit. Adjust exhaust piping if necessary.
• Clean intake screens: Remove debris, dust, or insect nests from intake grilles and screens to restore airflow.
• Inspect intake air temperature sensor: Locate the sensor near the air filter or intake duct. Check the connector and wiring. Replace the sensor if readings are clearly incorrect (e.g., high temperature on a cold day).
• Retest under load: After improving airflow, run the generator under typical load and monitor intake temperature via the controller.