Specifications

9-2010 5. Troubleshooting
5.4.25 Low Fuel Pressure - Fault Code 78
Possible Causes: Wire connections, fuel system, fuel pressure switch
Corrective Actions:
1. Open any closed fuel valves.
2. Have unit serviced by an authorized Cummins Onan dealer.
5.4.26 Failure To Transfer To Generator Set - Fault Code 79
Possible Causes: Wire connections, faulty positional switch, faulty transfer switch component(s).
Diagnosis & Solution:
1. Verify that the main AC circuit breaker on the generator set is to “On".
2. Have unit serviced by an authorized Cummins Onan dealer.
5.5 Communication Troubleshooting
5.5.1 In-Home Network Access to Generator Set
Troubleshooting
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.
Possible Causes: Bad connections or bad communications
Corrective Actions:
1. Check connections.
a. Verify that the Ethernet cable is plugged into the generator set control and the router.
b. Verify that the computer is connected to the same router as the generator set via an
Ethernet cable.
c. Verify that the wireless card on the computer is turned off.
d. Check to see if both ends of the Ethernet cable are assembled and crimped as
described in the installation instructions. If not, reassemble and crimp as described in
the installation instructions.
e. Verify that the Ethernet cable connections between the generator set and the router
are solid and correct.
f. Proceed to "Check communications."
2. Check communications.
a. Check to see if you can access a standard web page with the computer connected to
the same router as the generator set. If not, contact your router manufacturer for
troubleshooting information.
A029V089 (Issue 3) 45