Danfoss Error 1027 Hot! May 2026

Technical Write-Up: Danfoss Drive Error 1027

Overview

Error Code: 1027 Manufacturer: Danfoss Product Line: VLT AutomationDrive (FC 302) and related VLT series Category: Serial Communication Fault Severity: Warning / Alarm (Configurable)

In the architecture of a Danfoss drive, the control card acts as the "brain," while the power card handles the high-voltage electrical output to the motor. Error 1027 occurs when this internal link breaks. danfoss error 1027

Danfoss drives (including the popular VLT® HVAC Drive, VLT® AutomationDrive, and VACON® series) rely on robust fieldbus communication for speed reference, start/stop commands, and feedback. When Error 1027 appears, the drive is essentially saying, "I cannot hear the master controller." Ignoring this fault can shut down a production line, freeze a chiller plant, or halt a conveyor system. Technical Write-Up: Danfoss Drive Error 1027 Overview Error

: Disconnect the mains supply completely and wait for the display to turn off (allow at least 5–15 minutes for DC link capacitors to discharge) before reconnecting power. Verify Input Voltage When Error 1027 appears, the drive is essentially

When error 1027 occurs, you might notice one or more of the following symptoms: