What issue are you looking for?
Basic checks would be
- if chiller is enabled, is it working - isolation valve open, pump on, it's actually cooling the water, etc
- same as above but for condenser water side
- if multiple chillers are enabled, are they equally sharing the load, or is one chiller providing more chilled water or colder chilled water than another
- if chiller has multiple stages, what %load/power is chiller operating, and does that match up with its cooling output
- are the temperatures you see going in and out of your chiller and cooling tower aligned with what you designed it to do and what your system needs