All manufacturing write-ups say that " it is stepless unloading to 20% " and what not.

I have seen a 150 TR a/c unit . They need to maintain dustfree conditions in the process. It runs during the evening - night time only. During daytime the load is minimal ( but not 0 )

The problem is during winters. The requirement goes down to 30-35 TR. The chillers continuously trip . All other equipment is fine. This problem is only during winters , guess it has something to do with the unloading being so low or is it something else?

Can such low compressor unloading lead to chiller tripping?