### 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
- SubType NOT OAU, RAS, RAU
- OAT > Supply Air Temperature AND Setpoint Temperature Not Reporting
- Outside Air Damper % < 90%
- Enthalpy < 26 IF Economizer Mode and Return Enthalpy Not Reporting
- OAT < (Return Air Temperature - 3 °F)

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

What underlying factor, as presented in the options, could explain the current asset state?
A. Verify physical operation of damper to control signal
B. Unit shutdown for some reason
C. Excessive Cooling
D. Electrical system problems


# Answer

Answer: A. Verify physical operation of damper to control signal

Guidance Rationale: Given that the AHU is running and the outside air temperature (OAT) is greater than the supply air temperature,
with the outside air damper percentage being less than 90%, it suggests that the damper might not be functioning correctly. 
The condition where the setpoint temperature is not reporting further indicates a potential issue with the control system. 
Additionally, the enthalpy being less than 26 in economizer mode, combined with the return enthalpy not reporting,
points to a problem with the damper's ability to regulate airflow effectively. 

The fact that these conditions have persisted for 2 hours reinforces the need to verify the physical operation of the damper to ensure it is responding correctly to the control signal.