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: Disconnect the mains supply.
If you are qualified to open the drive, check the ribbon cables or connectors that link the control card to the power card. A loose connection can trigger communication errors. danfoss error 1027
Apply power while holding these keys for at least 5 seconds. Note: This will erase all your custom parameters. Because Error 1027 is an internal fault, manual
If you have a similar, working Danfoss VLT drive nearby, swap the control card to see if the error follows the card or stays with the drive. A loose connection can trigger communication errors
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.
: Contact an authorized Danfoss Service Partner or supplier to verify if the drive's internal components have failed. Top ten VFD tech support calls - Danfoss
Press and hold the , [Main Menu] , and [OK] keys simultaneously.