Specifications

5. Troubleshooting 9-2010
3. Check and service air filter as necessary.
4. Replace spark plugs.
WARNING: Some Generator Set service procedures present hazards that can result in
severe personal injury or death. Only trained and experienced service
personnel with knowledge of fuels, electricity, and machinery hazards should
perform Generator Set service.
5.4.9 Overvoltage - Fault Code 12
Possible Causes: Generator set loads, wire connections, windings
Corrective Actions:
1. Have unit serviced by an authorized Cummins Onan dealer.
5.4.10 Undervoltage - Fault Code 13
Possible Causes: Generator set loads, wire connections, windings
Corrective Actions:
1. Have unit serviced by an authorized Cummins Onan dealer.
5.4.11 Overfrequency - Fault Code 14
Possible Causes: Generator set loads, engine governor function, fuel supply, air fuel mixture,
exhaust system, choke, demand regulator, carburetor, generator windings, wire connections
Corrective Actions:
1. Have unit serviced by an authorized Cummins Onan dealer.
5.4.12 Underfrequency - Fault Code 15
Possible causes: Generator set loads, engine governor function, fuel supply, air fuel mixture,
exhaust system, choke, demand regulator, carburetor, generator windings, ignition, wire
connections
Corrective Actions:
1. Reduce the number of connected loads especially loads that require higher starting current
such as air conditioners.
2. Have unit serviced by an authorized Cummins Onan dealer.
5.4.13 Governor Actuator shutdown - Fault Code 19
Possible causes: Wire connections, governor actuator
Corrective Actions:
1. Have unit serviced by an authorized Cummins Onan dealer.
5.4.14 Governor Actuator Overload - Fault Code 22
Possible causes: Generator set loads, wire connections, fuel supply, air fuel mixture, exhaust
system, governor actuator, ignition system
42 A029V089 (Issue 3)