Cause: No communication between LCP and frequency converter comes when the cable connecting the LCP to the drive's control board might be loose, damaged, or completely disconnected.

danfoss vlt micro drive error 84 indicates No communication between LCP and frequency converter. This means the connection between the Local Control Panel (keypad) and the main control board of the drive has been lost.

Troubleshooting Steps:

Follow these steps to correct danfoss vlt micro drive error 84:

• Ensure the cable connecting the LCP to the drive is securely plugged in at both ends.
• Remove the LCP from the drive and carefully reattach it, ensuring it is properly seated and the connection is firm.
• If you have another VLT Micro Drive or a compatible LCP, try swapping it with the one giving the error. If the error disappears, the original LCP is likely faulty.
• Inspect the cable for any signs of damage (cuts, bends, etc.).