- Cooling Mode with Low Flow


This analytic is meant to determine a supply airflow issue to the VAV box or a control sequence issue associated with the damper of the VAV box.

Root Cause

1. VAV - The controller is commanding the damper open, but the damper or actuator in a position other than the control command. 2. AHU - Supply Fan VFD is not ramping to meet static pressure setpoint. 3. AHU - Static pressure setpoint is being met, but static pressure setpoint is too low. 4. Poor VAV system airflow distribution design. 5. One or many BAS points associated with the rule have not been properly identified or mapped properly in the BAS system.



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