humidity inside refrigerant circuit

[sakly]

hi
in a R404A refrigerant circuit , the high rate of humidity 900ppm could induce the formation of ice beans located inside the elbow of evaporator operating at -30°c. ( the phenomenon is called ice bean effect). The situation could lead to create a big force on the elbow and then leakage on the welding.
Do you think this situation is so probable?

[nike123]

It is more likely that, before that occurs, you end up with capillary tube or TEV blocked by ice.
Correct me if I am getting something wrong here.

[The Viking]

And with modern refrigerants/oils, an acidic oil mixture that eaten the windings resulting in a burnout.

[hendry]

yeah .. mos cases, high moisture content in refrigeration piping will cause immediate chockages at high flow low pressure areas ... expansion valves & solenoid valves.

that will be good signs & symptoms for immediate remedies. cheers