LED1

UnclassifiedSpeed

What This Code Means

Generator set shuts down when engine speed exceeds 3750 rpm

Possible Causes

  • •Engine overspeed (exceeding 3750 rpm / 750 Hz)
  • •Engine speed exceeds 3750 rpm
  • •Frequency exceeds 750 Hz across terminals C and E on the AC side of the voltage rectifier

Suggested Actions

  1. 1Connect frequency meter across terminals C and E on the AC side of the voltage rectifier to test overspeed shutdown at 750 Hz
  2. 2Perform overspeed shutdown test
  3. 3Reset the controller by moving the master switch to the OFF position and then back to AUTO

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for LED1 on your specific Rehlko unit — cited to the OEM manual, not a forum guess.

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