Rehlko

LED4

UnclassifiedGeneral

What This Code Means

Shutdown voltage is not within tolerance; Generator set fails to shut down on overvoltage fault within approximately 2 seconds

Possible Causes

  • •Engine temperature exceeds 110 °C (230 °F)
  • •HET (High Engine Temperature Switch) contacts close
  • •High coolant temperature (High Coolant Temperature Switch [HCT] closes completing path to ground)
  • •High exhaust temperature (High Exhaust Temperature Switch [ETS] closes completing path to ground)
  • •Incorrect calibration of the overvoltage shutdown setting
  • •LCS (Loss of Coolant Switch) contacts close
  • •LOP (Low Oil Pressure) shutdown switch contacts close
  • •Loss of coolant (Loss of Coolant Switch [LCS] closes completing path to ground)
  • •Low coolant level
  • •Low oil pressure
  • •Low oil pressure (Low Oil Pressure Switch [LOP] closes completing path to ground)

Suggested Actions

  1. 1Repeat the calibration output procedure
  2. 2Slowly increase voltage and verify the shutdown setting by observing the voltmeter and noting when red LED4 lights
  3. 3Turn the voltage adjustment potentiometer counterclockwise to reduce output voltage

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