Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
You need to check node names (did you have a sketch of you system with node name? It could be useful):
NODE 12 is FCU-LC-09 Coil:Cooling:Water outlet node as well as HW HTG COIL Coil:Heating:Water inlet node name, that obviously cannot be (it has no reason).
Moreover you have as "UNDEFINED" 2 nodes on CHW Coil (maybe air node?) and 1 node on HW Coil.
You have to set properly insert these objects on both Air loop(s) and CHW/HW loops
