Onan

LET

UnclassifiedCooling

What This Code Means

Engine malfunction shutdown; Common fault lamp is illuminated and none of the diagnostic diodes (overcrank, low oil pressure, high engine temperature) are illuminated; Engine does not start within 75 seconds during cycle cranking; Engine monitor lights fault lamp and opens the cranking circuit; High engine temperature warning/shutdown; Low oil pressure warning/shutdown; Low engine temperature fault lamp illuminated (no associated engine shutdown); Low oil pressure; Engine shutdown; Engine fails to start; Overspeed; High engine temperature; Low engine temperature; Fault light illuminated

Possible Causes

  • •Engine malfunction
  • •Engine temperature reaches 215°F (102°C)
  • •Failure to build up oil pressure within approximately 12 seconds
  • •Failure to start within a 75-second cranking period
  • •Fault in engine operation
  • •Low engine temperature
  • •Oil pressure reaches 97 kPa
  • •Overcrank (failure to start)
  • •Overspeed condition (approximately 2100 r/min)

Suggested Actions

  1. 1Have control panel interior components adjusted, tested, or replaced by a qualified service representative
  2. 2Manually reset the engine monitor using the Reset Switch after an engine shutdown
  3. 3Use the manual reset switch for the engine monitor after an engine shutdown

Related Onan Fault Codes

LOPLOW ENGINE TEMPERATUREHIGH ENGINE TEMPERATURE LAMPLOW OIL PRESSUREHIGH ENGINE TEMPERATURELOW OIL PRESSURE LAMPHETO.C.FAULT CODE 4O.S.FAULT CODE 2OVERCRANK
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