Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The error seems to be occurring because the Fan:ZoneExhaust objects used in the model are currently set to be coupled with the HVAC system (default value for the System Availability Manager Coupling Mode). As a result, they are running when the system is night cycling and creating this flow imbalance.
If you set the System Availability Manager Coupling Mode to Decoupled for both Fan:ZoneExhaust, not only the error will go away but you'll capture the intended behavior of these fans.
