Onan 73 fault code — Generator
Applies to: QG 7000i DF HGLCA Spec A
What 73 means
The Cummins Onan QG 7000i DF HGLCA operator manual list Code 73 as AC Output Circuit Fault.
Owner-safe checks
- Stop the generator.
- Disconnect connected appliances before another attempt.
- Have the appliance or circuit repaired before reuse.
Service-only work
- Internal generator electrical output, inverter, controller, sensors, fuel system, ignition, AC circuit, and engine diagnosis belongs to Cummins service or a qualified generator technician.
Safety boundary
Generators can produce carbon monoxide, hot surfaces, fuel hazards, moving-part hazards, and lethal voltage. Shut the generator down and do not open energized compartments unless qualified.