⚠
warning Miller
Error Code [Not] [Vald]
Incorrect software setups attempted indicating user input error with configurations and menu selections.
? What Causes This
Invalid or unsupported configurations such as pressing AC Waveshape while in DC mode.
✓ How to Fix It
Properly select modes according to welding procedure requirements, reset to default if unsure.
Source: page 69 of the official manual
From the manual
This error code appears in:
Miller Dynasty 400