58

UnclassifiedCooling

What This Code Means

Speed sense loss; High exhaust temperature; Speed Sense Loss; High Exhaust Temp; Emergency Shutdown; Excessive Smoke Under Load; Emergency shutdown

Possible Causes

  • Grounded or shorted quad windings
  • Broken or loose switch leads
  • Quad leads not fully seated in connector to control
  • Control plugs not fully seated
  • Improper field resistance
  • Field resistance open to ground
  • Poor brush condition and contact
  • Exhaust temperature switch S5 malfunction
  • Restricted or incorrect raw water flow
  • Faulty customer input connections
  • Faulty K5 relay operation
  • Improper field resistance reading (open to ground)
  • Faulty exhaust temperature switch S5
  • Improper raw water flow
  • Improper K5 relay operation
  • Overload Condition
  • Restricted or improper raw water flow
  • Faulty K5 relay
  • Broken switch leads
  • Loose switch leads

Suggested Actions

  1. 1Check quad leads fully seated in connector to control
  2. 2Check control plugs fully seated
  3. 3Check field windings
  4. 4Verify proper field resistance reading, open to ground
  5. 5Check brush condition and contact
  6. 6Check for grounded or shorted quad windings
  7. 7Check for broken or loose switch leads
  8. 8Check exhaust temperature switch S5
  9. 9Check raw water flow
  10. 10Check proper field resistance reading, open to ground
  11. 11Check grounded or shorted quad windings
  12. 12Check customer input connections
  13. 13Check K5 relay operation (if equipped)
  14. 14Check broken or loose switch leads
  15. 15Check K5 relay operation

Related Onan Fault Codes

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