Poor earthing can cause electrical noise that disrupts the delicate communication signals between the internal boards. Troubleshooting and Solutions
⚠️ This is a . Do not simply clear the alarm and restart without investigation. danfoss error 1027
When this error is triggered, the drive signals that it has stopped receiving valid telegrams (data packets) from the master controller (PLC or SCADA system) within a predetermined time window. Poor earthing can cause electrical noise that disrupts
If you have a persistent Error 1027 that resists these steps, contact Danfoss Technical Support with your drive’s type code (e.g., FC-102P7K5T2E20H1) and the option card’s part number. They can perform advanced diagnostics using the VLT® Service Tool. When this error is triggered, the drive signals
Wait until the LCP (Local Control Panel) display turns off completely. Reconnect the power and see if the error clears. Disconnect mains power and wait for the display to go dark.