Can't control chilled water loop max temperature

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Hello,

I try to build simple simulation for single zone temperature and humidity control in open studio, using air side with chilled water coil and hot water coil. The air loop is working fine, the water loop however still got problem. I want to simulate chiller water loop with CHWS/CHWR 5/10 C, but the simulation result got the maximum evaporator inlet water temperature at 6.4, makin the Chiller COP very low.

I've set in the plant loop settings the maximum loop temperature at 10 C and minimum loop temperature at 5 C. I got maximum and minimum flowrate autosized. I also set the design loop exit temperature at 5 C and Loop design temperature difference at 5 K. Still, the inlet evaporator temperature max always at 6.4 C.

In CHW loop, I only put pipe adiabatic and cooling coil in demand equipment and only chiller in supply equipment (and set point manager, set at 5 C)

this is the file for the model https://drive.google.com/file/d/1RbNi...

Please help, thank you!!