Which one is the best PUE in the following:

The operation noise of the NetCol5000-A air conditioning unit is abnormal. It should be checked whether the compressor, fan, pipeline, etc. are fixed normally and there is looseness.

During commissioning the FusionModle1000 fire extinguishing system, you can directly heat the smoke detector to simulate a fire alarm

The () is used for high power density cabinets in data center.

Before NetCol5000-A maintaining, what information should be recorded about the site information.