System malfunction

What does F-24 mean?

An internal system malfunction has occurred within the inverter electronics, potentially influenced by electromagnetic compatibility (EMC) issues. This fault causes an immediate switch-off and inhibits operation, signifying a critical internal hardware or software problem that requires expert attention.

• Internal power supply monitoring fault, indicating an issue with an internal voltage rail (e.g., 5V, 3.3V) on the control board.
• Failure of a digital signal processor (DSP) or field-programmable gate array (FPGA) responsible for critical control loops.
• Data integrity error during communication between the control board and optional expansion modules (e.g., I/O, encoder cards).
• Physical damage or contamination (e.g., moisture, conductive dust) on the main control board.
• Over-current detection within an internal circuit, indicating a short or overload on a sensitive internal rail.

Click steps to track your progress.

1. 1

   Power cycle the inverter and visually inspect the main control board for any signs of arcing, burn marks, or bulging capacitors.

2. 2

   Disconnect any optional expansion modules or communication cards and attempt to power up the inverter without them.

3. 3

   Use a multimeter to verify voltage levels of accessible internal test points (e.g., 5V, 3.3V) on the control board, if safety allows and documentation provides points.

4. 4

   Ensure the control cabinet environment is free from conductive dust, moisture, or corrosive gases that could cause internal shorts.

5. 5

   Confirm the inverter's input voltage stability and ensure that it is consistently within the specified operating range, without fluctuations.