Hi - there is no cop applied in Archsim. You would do that yourself using the output from energy plus. What you are getting is exactly what the IdealHeatingCooling System in EnergyPlus calculates.
As you are unaware about the features of your HVAC unit. You can look for AC repair Passaic county NJ experts, my neighbor took their help to increase HVAC unit efficiency. You can also set the COP with professional guidance.