F3

Possible Causes

• •Low oil pressure
• •High coolant temperature
• •Blown 5A fuse
• •Starter switch is engaged in the off position
• •Oil pressure switch failure
• •Water temperature switch failure
• •Charging system failure
• •Routine maintenance procedures
• •Fuel filter replacement
• •Lack of B+ power to the push button switch
• •Push button switch failing to send 12V to the pump's positive terminal
• •Poor ground connection on the negative side going to the control box chassis
• •Low oil pressure safety signal from Oil Pressure Switch
• •High water temperature safety signal from Water Temperature Switch
• •Fault detected by safety shutdown system
• •Fault detected by Oil Pressure Switch
• •Fault detected by Water Temp Switch
• •High engine coolant temperature
• •Overspeed condition
• •Engine fault condition monitored by sensors

Suggested Actions

1. 1Check the 5A fuse first
2. 2Install fuel air purge kit (P/N EE64234)
3. 3Use the priming pump to purge air from the fuel system and restore optimal fuel flow
4. 4Verify B+ power is going to the push button switch
5. 5Verify that pressing the button sends 12V through the connector to the pump's positive terminal
6. 6Check and clean the ground connection on the negative side going back to the control box chassis
7. 7Troubleshoot individual pinouts during circuit testing using harness connector pin configurations (CN1, CN2, CN3, CN4, CN5, CN6, CN7, CN8, CN10, CN11, CN14, CN15)

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