Unitary system not meeting cooling load

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Add these report variables to your simulation.

Output:Variable,*,Zone Air Temperature,hourly; !- HVAC Average [C]
Output:Variable,*,Zone Predicted Sensible Load to Cooling Setpoint Heat Transfer Rate,hourly; !- HVAC Average [W]

The results only show a heating load (for Brisbane AUS but I assume the same is true for your weather). Also, the zones named Thermal Zone X show a 0, I think this means there is no thermostat. You also have many warnings in the err file that should be addressed.