ROM - Control system firmware internal test failed

What does ROM mean?

The internal test of the Sunny Boy's control system firmware has failed. This is an error message, indicating a problem with the inverter's core software.

• Internal firmware malfunction or corruption.

Click steps to track your progress.

1. 1

   Record the error message, serial number, and model number of the Sunny Boy.

2. 2

   Perform a system power cycle: turn off DC, then AC, wait a few minutes, then turn on AC, then DC.

3. 3

   If you observe this failure often or it persists after a power cycle, contact SMA America for assistance.