Danfoss Error 1027 [updated] Jun 2026

Note: You will need to reprogram your motor nameplate parameters after this step. When to Contact Technical Support

If memory corruption or a corrupted configuration parameter is causing the block, a factory reset will re-initialize the drive settings. Power down the VFD completely.

For long cable runs (over 30m) in VFD panels, add:

: In high-performance or lift-specific drives (like the VLT LD 302), error codes in the 1024–1279 range signify that a CAN telegram cannot be sent. danfoss error 1027

From the PLC or network scanner:

: Since the error notes a "possible hardware error," check if the communication module is properly seated in the drive.

Keep the keys pressed while re-applying mains power to the drive. Note: You will need to reprogram your motor

Disconnect the motor leads (at the drive output). Run the drive without a load.

If comfortable, open the drive casing and check internal ribbon cable connections to the control board for loose connections or corrosion. 3. Check for Electromagnetic Interference (EMI)

Before assuming the drive is dead:

Understanding the root cause is 80% of the repair. Field data from hundreds of service calls show these six causes dominate.

Look for the exact sub-code associated with Alarm 38 to verify if the CAN bus data stream or a specific memory sector failed. Step 3: Isolate Environmental Factors

Minor logical glitches or voltage spikes can freeze internal processors. Turn off the main incoming power supply to the VFD. For long cable runs (over 30m) in VFD