Internal fault (General)

What does 38 mean?

A general internal fault has been detected within the frequency converter, preventing normal operation. A specific sub-code, referenced in Table 7.6, provides more detailed diagnostic information about the nature of the internal issue. This fault indicates a critical hardware or software problem requiring specific troubleshooting based on the sub-code.

• Transient hardware malfunction on the control board or power card due to EMI or power fluctuation.
• A general firmware error or corruption that prevents normal drive operation.
• Internal component failure (e.g., processor, memory) not specifically covered by other sub-codes.
• Insufficient or unstable internal DC bus voltage due to auxiliary power supply issues.

Click steps to track your progress.

1. 1

   1. Cycle power to the frequency converter (off for 1 minute, then on) to reset the internal logic.

2. 2

   2. Check the LCP display for any specific sub-code (e.g., "38.X") that provides more detailed diagnostic information.

3. 3

   3. Perform a parameter initialization (P14-22 set to '2') to rule out parameter corruption, then reload known good settings.

4. 4

   4. Ensure stable input power and verify proper grounding to prevent EMI related issues.