I'm trying a different approach and trying to work from only temperature measurements and not pressure. This is something i wanted to try after reading a lot of Gary's posts and an approach i think most 'old skool' engineers use.

The system i'm working on is a feeding an AHU that cools a production area in a food processing factory. AHU has two other compressors feeding it, all three are separate with their own condensers and TEV. All sharing the common AHU.

The problem i'm having is the sightglass is still flashing constanly, not bubbling. It appears as the refrigerant is hitting the moisture indicator pin in the middle if the sightglass. All my measurements are telling me the system is charged correctly.

System was vacuumed to regs and filled with virgin R404a

Here are my measurements all in degree C
SST: -24
SCT: 24
Ambient: 3 With one condenser fan on constant and the other cycling in and out. Other two condenser fans not needed.
TD @ condenser: 21
Subcool: 4-6k This is steady with the head pressure holding between 11-13 bar.

Liquid line @ TEV: 7
Evaporator outlet: 9-11

Going by my subcool measure results the condenser is working efficiently.

Starting to get tunnel vision so if it's something glaringly obviously please point it out