### Asset Description:
AHU: Air Handling Unit: A device used to condition and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system.

### Conditions:
- AHU Running
- Enthalpy < 15 BTU/lb
- Humidification Valve % < 5%

### How long the conditions were met:
Met for 2 Hours

Given the above detected conditions, what should the operator look for?
A. A new leak in the air lines
B. CRAC units that can be turned off to provide energy savings
C. Check the command from the BMS
D. Logic that is working too quickly not allowing the system to stabilized


# Answer

Answer: C. Check the command from the BMS

Guidance Rationale: 
The Air Handling Unit (AHU) is actively running, yet the
enthalpy is below 15 BTU/lb, indicating cool, dry air, and the humidification
valve is less than 5%, suggesting no active humidification is occurring. Since
these conditions have persisted for 2 hours, the system appears to be operating
in a state where humidification is not required—yet the AHU remains active. This
raises questions about the intent and correctness of the control commands. To
avoid unnecessary operation or inefficiencies, it is important to verify the
instructions issued by the Building Management System (BMS). 

While option A (a new leak in the air lines) might be considered, it does not directly address the
discrepancy between the AHU's operation and the environmental conditions. Option
B (CRAC units that can be turned off to provide energy savings) is relevant for
energy efficiency but does not explain the current operational state of the AHU.
Option D (logic that is working too quickly not allowing the system to
stabilize) could be a factor, but the prolonged duration of the conditions
suggests a more fundamental issue with the control commands. Therefore, the
operator should check the command from the BMS to ensure the AHU is being used
appropriately for the actual environmental demand.