As is known,  obligatory attributes, necessary at installation chiller,
are so-called shoot-off valves.
I am not quite sure, but I assume,that  it's made for when chiller does
 not work, the pump consumed smaller power (1), and that the cooled
 water did not proceed through evaporator(And condenser) (2).
My question: If nevertheless to open of the valve at not working chiller,
 provided that In system there is some chillers and some of them continue to
work, i.e. to cool water,  what negative consequences it will result?

I assume that you are referring to shutoff valves, which are used to stop the flow of water through a chiller which is not operating.

When water is allowed to flow through the evaporator of a chiller which is not operating, this water is bypassing the operating chiller, so the temperature of your chilled water system will be affected.  It should not have any adverse consequences on the non-operating chiller itself, but you should ensure that the operating chiller is still receiving adequate flow.

If water is allowed to flow through the condenser of a non-operating chiller, it should not cause problems with that chiller as long as the temperature is within the range that the manufacturer specifies.

Be carefull....Depending on your CHW pipe configuration you may need the isolating valves even with the check valves and dedicated pumps for each chillers. I had an instance where water was induced through the Chiller/Pump that was switched OFF by the pump that was running and it effected my chilled water supply temperature.

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