CPU fault

What does E.CPU mean?

This fault indicates a critical communication error within the inverter's built-in CPU, leading to an immediate stop of the output. Potential causes include severe electrical noise in the operating environment or an unintended short circuit between the PC and SD control terminals. Resolving this is essential for any inverter operation.

1. 1

   Identify and mitigate sources of excessive electrical noise that might be affecting the inverter's CPU.

2. 2

   Inspect the wiring for terminals PC and SD to ensure there is no short circuit, particularly if E.6 or E.7 faults are also observed.

3. 3

   If troubleshooting steps do not resolve the fault, contact your sales representative for advanced diagnostics.