FWIW, I would never put dye in any of my units or my customers units.
There are more reliable ways to find leaks, and there are also common area's to look for them.
Non-condensibles are things in the system that can not be compressed, air, water, bits of O-rings etc.
The dye manufacturers claim the dye is condensible, I have concerns with that.
Dye is really only helpful in large commercial systems, think the size of a house, not residential split systems or window units.
Anyone who feels the need to use dye on a window unit prolly got no business messing with it to begin with.
I have been doing A/C & Heating work for over 35 years and am not aware of any units containing dye from the factory.
just my 2 cents