Chiller Troubles or Not

i'd like to hear from all you trouble shooters as to which chillers you've had the most trouble with or not.
for my part its got to be carriers 30gx with various problems,then theres the old trane chillers with suction transducer faults, cosfi and other italian chillers with condenser leaks, yorks lwt sensor faults ,so far the best seem to be daikin

Perhaps posting in the correct section might generate more response.

I've moved it for you.

any chiller that hasnt been looked after - which is normally what we get called out to -
carrier --- those compressors ----

Dear All,

I'like to what are the factors to cause surging on water cooled centrifugal chillers? Thanks.:)