Zone Mean Air Temperature is not following building Set Point Temperature

edit

Hi,

I'm wondering if anyone could assist me with the following modeling issue. Actually, I'm modeling a single-room office building in a summer day- while MAT is not following the cooling setpoint temperature for the beginning hours of the day (having zero cooling loads for those hours- regardless of the setpoint temperature for those hours of the day).

While it seems to be an occupancy schedule, I already changed the schedule of the Fan(on/off) as well as my cooling HVAC (Coil:Cooling:DX:SingleSpeed) to Always_On (which is basically a fractional schedule of 1 for all 24 hours of the day).

Here is the link to the idf file that I'm referring to: https://drive.google.com/file/d/1qDIo...

Any ideas would be greatly appreciated! Sincerely, Mohammad