I have a 3~ Tecumseh compressor R404a.

HP 12 Bar, a bit low
LP 6 bar, a bit high

Compressor appears to be pumping and sounds OK.

However, oil and refrigerant stink like a burn out. Expansion valve filter is stained black but not blocked, maybe partially blocked but you can still see light through it.

Filter drier removed and can be blown through !

However there's very little cooling coming back from the evaporator, which appears to be starved, SH not measured but obviously very high.

Refrigerant has been weighed, no signs of leaks, charge OK, has a receiver.

Its an ice cream display counter, set point -14c.

I have removed compressor and drained some of the oil, it's clear, smells acidic though.

I'm fairly sure the compressor has had it but the pressures are confusing the hell out of me, any ideas whats going on anyone?

Haven't checked gauges for a while...

Thanks