So is the unit acting any different after the possible leak? This is the easiest way to tell. With an inverter unit, if you lost much gas, the compressor will run faster for longer each cycle.
The unit has an operation map in it, like a car. To find its place on the map, the compressor will have to move more gas from start-up. With R410a, the pressure difference is very high, so frosting and discharge temperature issues show up quickly compared to R22 systems. The inverter units are typically loaded to the gills with temp and pressure sensors so the controller can work well under a wide variety of conditions.
If the unit is still operating, I wouldn't sweat it too much. As long as you've sealed the leak, and the unit isn't tripping or faulting out, it's operating within its map. If it senses an abnormally low charge condition while running, it will most likely alert you to this condition. Like a car, the fault code may point to something else, but the unit will tell you something is awry.
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