CPU Fault

What does E.CPU mean?

This fault indicates an internal communication fault within the inverter's built-in CPU. This is a critical internal error that causes the inverter output to stop, suggesting a potential hardware malfunction or severe internal interference. Such a fault can lead to complete loss of control and operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Power cycle the inverter (turn off, wait, then turn on) to attempt a soft reset of the CPU.

2. 4

   If the problem persists after troubleshooting environmental factors and power cycling, contact a sales representative for further diagnosis, as it may indicate an internal hardware failure.