### 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
- Supply Fan Output % > 50%
- Filter Differential Pressure > Supply Filter Static Pressure Setpoint

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

From the given options, which one MOST likely corresponds to the observed asset behavior?
A. Unit shutdown for some reason
B. A new leak in the air lines
C. Check condition of the filters
D. Fan is overridden


# Answer

Answer: C. Check condition of the filters

Guidance Rationale: 
The Air Handling Unit (AHU) is currently running, and the
supply fan output exceeds 50%, indicating that the system is actively working to
deliver airflow. However, the filter differential pressure is greater than the
static pressure setpoint, which means that air is encountering more resistance
than expected across the filters. This condition has persisted for 2 continuous
hours, suggesting a sustained issue—most likely due to clogged or dirty filters
that are restricting airflow and increasing pressure drop. 

Given the active fan operation and elevated differential pressure, the most probable cause is filter
degradation or blockage. In contrast, option A (Unit shutdown for some reason)
is not applicable since the AHU is running. Option B (A new leak in the air
lines) would typically result in a decrease in differential pressure, not an
increase. Option D (Fan is overridden) does not explain the elevated
differential pressure across the filters. Therefore, the most appropriate
response is: "Check condition of the filters."