Onan generator · 1 model line
Onan generator code 73: AC Output Circuit Fault
Onan documentation lists 73 as “AC Output Circuit Fault”.
What code 73 means by model
| Model line | What the manufacturer says | Source |
|---|---|---|
| QG 7000i DF (HGLCA Spec A) | The Cummins Onan QG 7000i DF HGLCA operator manual list Code 73 as AC Output Circuit Fault. | Cummins Onan RV Generator Manuals Cummins Onan QG 7000i DF HGLCA Spec A Operator Manual A079E225 |
What you can safely check
- Stop the generator.
- Disconnect connected appliances before another attempt.
- Have the appliance or circuit repaired before reuse.
Stop and call a technician for
- Internal generator electrical output, inverter, controller, sensors, fuel system, ignition, AC circuit, and engine diagnosis belongs to Cummins service or a qualified generator technician.
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.
Write this down before you call
- generator model/spec
- hour meter
- fault blink count
- loads running when the shutdown occurred
Other codes on Cummins Onan QG 7000i dual-fuel inverter generators
Full table: Cummins Onan QG 7000i dual-fuel inverter generators
- 1 Engine Temperature Exceeded Limit
- 4 Over Crank
- 6 Low Oil Pressure
- 12 Over Voltage
- 13 Under Voltage
- 14 Over Frequency
- 15 Under Frequency
- 19 Actuator Circuit Fault
- 25 Alternator Overvoltage
- 26 Alternator Undervoltage
- 27 PMA Sense Lost
- 29 High Battery Voltage
- 31 Over Speed
- 34 Inverter temperature Exceeded Limit
- 36 Other Faults
- 38 Over Current (Field Overload)
- 43 ECU Fault
- 45 Speed Sense
- 52 Fuel Injector or IPM Pump Circuit Fault
- 53 Oil Temperature Sensor Circuit Fault
- 54 MAT Sensor
- 57 Over Prime Or LPG Pressure Sensor Fault, The LPG Solenoid Valve Fault
- 81 Alternator Stator Circuit Fault
- 85 Oxygen Sensor Fault