Freezing evaporator and bunch of problems on messed up meat refrigation system

Hello, I am not an refrigation engineeer I am naval architect and marine engineer but we have freezer and refrigation system on board ship. People fiddled with it and now its messed up. It consists of bitzer 2DES-2Y-4OS compressor. https://preview.redd.it/wxnwqo9lopoe1.jpg?width=1600&format=pjpg&auto=webp&s=05bd2f9fb008bb45f5d6733975c00c6dad4eeb2f https://preview.redd.it/3kodlq9lopoe1.jpg?width=1600&format=pjpg&auto=webp&s=12e196caa46a9b4ccf183aa821caf83828ebde35 Sea water cooler as condenser danfoss TE2 thermal expansion valve (it was TES2 but they got wrong spare parts and still replaced it anyways also i dont thing it was faulty probably it was set wrong) Coolant is R404A They have added R404A discharged R404A adjusted switches adjusted expansion valve even turned the condenser sea water inlet outlet valves down a bit. working pressures of the compressor There is excessive freezing on both discharge and suction side and it doesnt cool properle it does not reach -18 C and compressor shuts of from high pressure before now it stops from low pressure. expansion valves Could you point me how can i improve it or discuss what is it? So i can learn submitted by /u/a7dfj8aerj [link] [comments]