I have a cool room running on R22. 1-4 degrees C.
There have been problems with this room for some time.

I put my gauges on and am reading 310kpa suction and high side is a stable 1500kPa,(With a variable speed Fan). I pumped the system down to 30kPa and it tripped on HP. When I checked the high side, Liquid was in my manifold. .

I bled a substantial amt of refrigerant into a reclaim cylinder. Decided to run the system again to check. My LP dropped to 110Kpa. .

Pumped it down again to 0kpa and did not trip HP. .

Did some pipe work and ran it again. Same pressures and my suction line was frosting bad. I checked refrigerant charge and it seemed OK.

I checked the superheat.........25K... .

I began to adjust....14K......12K....................12K...............Even with TXV fully open, I was still only getting 12K.

But.......................The compressor began to "ICE" and oil was foaming and rapidly leaving the compressor. OMG! what is going on. I watched oil pass through the LL sight.... ....







To be continued..................................................





What is the general consensus on the problem here?
I will update with my remedy but I'd like to know if anyone has come across a similar problem.