Danfoss Error 1027 May 2026

Troubleshooting Danfoss Error 1027: A Quick Guide If you're staring at your Danfoss VLT display and see Error 1027, you likely have a hardware communication or power board issue. Unlike common user-fixable alarms, Error 1027 is often a "deep-level" fault indicating that the drive's internal systems aren't talking to each other correctly. What is Danfoss Error 1027?

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(likely the power board or control card). You should contact a certified Danfoss Service Department for repair or replacement. Top ten VFD tech support calls - Danfoss Troubleshooting Danfoss Error 1027: A Quick Guide If

  1. The timeout period (set in Parameter 8-03 Control Timeout Time) expires.
  2. No valid PDO (Process Data Object) or cyclic data has been received during that window.
  3. The drive’s fieldbus option card (e.g., Profibus, Profinet, EtherNet/IP, Modbus TCP, CANopen) reports a loss of communication to the main control board.

Lesson: Always check physical termination before blaming the drive. The timeout period (set in Parameter 8-03 Control

Because Error 1027 is an internal fault, manual intervention is often limited. However, you can follow these steps to verify if the drive can be recovered: Perform a Power Cycle Disconnect the mains supply.

If the error persists after a reset, it often indicates a failed power supply board or a locked-up main contactor

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