USB Communication Fault

What does E.USB mean?

The inverter output has shut off because USB communication was interrupted for a duration exceeding the time set in Pr.548 USB communication check time interval. This indicates a break in the USB connection or an incorrectly configured communication watchdog timer. Loss of communication will prevent external control and monitoring.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If intermittent disconnections are expected or tolerated, increase the Pr.548 setting or set it to "9999" to disable the communication check.