FAULT CODE 7
UnclassifiedSpeed
What This Code Means
Overcrank; Loss of Raw Water Flow
Possible Causes
- •Broken or loose wires
- •Grounded or shorted S6 switch leads
Suggested Actions
- 1Check battery voltage
- 2Check fuel supply
- 3Check governor actuator operation
- 4Verify control plugs are fully seated
- 5Verify field sense and quad leads are fully seated in connector to control
- 6Check AC output
- 7Check field voltage
- 8Check for broken or loose wires
- 9Check field windings
- 10Check proper field resistance reading (open to ground)
- 11Check brush condition and contact
- 12Check proper quadrature resistance reading (open to ground and main windings)
- 13Check cylinder compression
- 14Check raw water supply
- 15Check raw water flow
- 16Check for grounded or shorted S6 switch leads
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Get a diagnosis walkthrough for FAULT CODE 7 on your specific Onan unit — cited to the OEM manual, not a forum guess.
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