ALARM 38

Internal fault

Danfoss · VLT HVAC Drive High Power

What does ALARM 38 mean?

An internal fault has occurred within the frequency converter, indicated by a specific code number defined in Table 6.1. This signifies a malfunction in the drive's internal electronics or software, requiring further investigation to prevent potential damage.

Complete Troubleshooting Guide

  1. 1

    Cycle the power to the frequency converter.

  2. 2

    Verify that any installed option cards are properly seated and installed.

  3. 3

    Check for any loose or missing internal wiring.

  4. 4

    Note the displayed internal fault code number and contact Danfoss Service or the supplier for further assistance.

Source: Danfoss Manual