AL.U

UnclassifiedGeneral

What This Code Means

Line-to-neutral voltage alarm active (AL.U)

Possible Causes

  • •Line-to-neutral voltage exceeds programmed thresholds
  • •One of the Line-to-Neutral voltages (VLN) is not within the set limits

ASK RUDY ABOUT THIS FAULT

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

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