Fatal Error (Initialization)

What does F8120 mean?

This is a fatal error that occurs during the drive's initialization phase. When F8120 occurs, the closed-loop or open-loop U/f control of the drive is no longer guaranteed. The drive immediately switches off, becoming torque-free, overriding settings in P-0-0119 and P-0-0117. Fatal initialization errors cannot be cleared without a complete power cycle.

• An error condition detected during the drive's initialization phase.

Click steps to track your progress.

1. 1

   Switch the drive off completely.

2. 2

   Clear the error message using command S-0-0099 (C0500 Reset class 1 diagnostics). This may require switching to parameter mode or a complete drive power cycle.

3. 3

   Ensure the drive is in operating mode and power is switched on ("Ab").

4. 4

   Switch on drive enable again (0-1 edge).

5. 5

   If this fatal error recurs repeatedly, replacement of an entire component (e.g. motor or drive controller) may be necessary.