Onan

7

UnclassifiedLubrication

What This Code Means

Overcrank; Loss of Raw Water Flow; Overvoltage; Undervoltage; Excessive Smoke Under Load; Low oil pressure; Loss of raw water flow

Possible Causes

  • •Broken or loose wires
  • •Grounded or shorted S6 switch leads
  • •Blocked heat exchanger
  • •Raw water impeller malfunction
  • •Incorrect output voltage
  • •Incorrect loads
  • •Fuel supply issues
  • •Loose sense lead connections
  • •Control plugs not fully seated
  • •Sense leads not fully seated in connector to control
  • •Improper field resistance (open to ground)
  • •Faulty field windings
  • •Poor brush condition and contact
  • •Grounded or shorted main windings
  • •Overload Condition
  • •Faulty raw water impeller
  • •Sender to control fault
  • •Incorrect battery voltage
  • •Fuel supply issue
  • •Governor actuator malfunction

Suggested Actions

  1. 1Check battery voltage
  2. 2Check fuel supply
  3. 3Check choke
  4. 4Check governor actuator operation
  5. 5Check if control plugs are fully seated
  6. 6Check if field sense and quad leads are fully seated in connector to control
  7. 7Check AC output
  8. 8Check field voltage
  9. 9Check for broken or loose wires
  10. 10Check field windings
  11. 11Check for proper field resistance reading, open to ground
  12. 12Check brush condition and contact
  13. 13Check for proper quadrature resistance reading, open to ground and main windings
  14. 14Check cylinder compression
  15. 15Check raw water supply
  16. 16Check raw water flow
  17. 17Check for grounded or shorted S6 switch leads
  18. 18Check raw water impeller
  19. 19Check for blocked heat exchanger
  20. 20Check output voltage

Related Onan Fault Codes

17CODE NO. 200-05511124133142151
Browse all Onan fault codes

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for 7 on your specific Onan unit — cited to the OEM manual, not a forum guess.

TRY IT FREE