BuildingAHU falsely created by json input

[PGorzalka]

What is the problem?

• teaserjson.input calls bldg.central_ahu = BuildingAHU(parent=bldg) even though bldg_in["central_ahu"] throws a KeyError that is catched by the try clause, thus creating a BuildingAHU object for a building that should have bldg.central_ahu = None (because upon export, there was no such object)

Why do we want to solve it?

• When exporting to Modelica, the model fails simulating in OpenModelica.

How do we want to solve it?

• Let the try clause catch the error before BuildingAHU is called