84

The connection between drive and LCP is lost

Danfoss · VLT Micro Drive FC 51

What does 84 mean?

Communication between the Local Control Panel (LCP) and the frequency converter has been lost. This prevents local control, monitoring, and parameter adjustment via the LCP, making it difficult to operate or troubleshoot the drive locally.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Attempt to reseat the LCP or try using a different LCP if one is available, to rule out a faulty LCP unit.

  2. 4

    Power cycle the drive to force a re-initialization of the LCP connection and internal communication buses.

Source: Danfoss VLT Micro Drive FC 51
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