When upgrading a MP-V from v1.xx to a later release the Box Flow reading is zero when there is a velocity pressure.
EcoStruxure Building Operation
SmarX IP controller MP-V
When a MP-V-7A or MP-V-9A is upgraded from v1.xx to v3.xx firmware. The MP-V does not control and the Box Flow reading is zero. The damper will rotate to 100% with a Velocity Pressure reading.
The Balanced k-factor and the Balance flow correction are found to be at zero:
During the upgrade process the flow data is not retained.
Before the upgrade at v1.xx, backup the flow balance data under the Flow Balance Data object,
Continue and complete the upgrade process, re-hosting the controller and downloading the objects.
Finally, restore the flow data.