Hi, I have an ice machine that's behaving weird on me. I'm letting the crank heater preheat the compressor for a few hours until it's warm. Every time I start it, I see some white foam on the oil level looking glass. The whole compressor starts freezing within a minute or two of start-up, and then it shuts off giving me the "oil pressure protection" error. If I restart it immediately, the compressor makes a clacking sound for half a second (flooded start?), and it wont shut down again.
Refrigerant pressure seems to be fine. 0.1 to 0.2 mpa on low pressure, 0.4 to 0.6 mpa oil pressure, and high pressure 2 mpa.

Any ideas on what's causing this? Shall I post pictures?