Error 1027 on a Danfoss VLT drive indicates a , which is classified as a severe internal hardware error.
Check if the controller is actively looking for the correct number of modules. If a module was permanently removed, change the configuration settings to "Not Selected" or "None" to stop the controller from looking for it. Step 6: Test for Hardware Faults
The Danfoss error code 1027 is a fault code that appears on Danfoss VLT drives, indicating a problem with the drive's operation. According to the official Danfoss documentation, error code 1027 is defined as: danfoss error 1027
: High electrical noise from nearby motors or unshielded cables disrupts internal communication.
Access parameters via the LCP panel or MCT-10. Verify: Error 1027 on a Danfoss VLT drive indicates
Error 1027 is typically labeled as an "Internal Error". It often points to a failure on the power card or a communication break between the internal control components. Solar Inverters (Solis/Danfoss variants): Code 1027 refers to a DC-INTF (DC Interface)
If these steps do not clear the "1027" message, it usually indicates a . At this point, the drive likely requires a professional repair of the internal power board or a full replacement of the unit. Step 6: Test for Hardware Faults The Danfoss
If an expansion module is not receiving its required 24V AC/DC power, its communication chip shuts down.
Poor seating of internal cables or option cards (e.g., Profibus/Ethernet modules) causing interference.
Ensure the main power supply is completely disconnected and locked out. Wait at least 20 minutes after power-down for internal DC bus capacitors to fully discharge before touching any internal components.
If you continue to see the error, the drive requires a service check to replace the faulty hardware. Are you seeing error 1027 on a specific model (e.g., Go to product viewer dialog for this item. Go to product viewer dialog for this item.