As the core equipment of HVAC systems, the stable operation of air handling units (AHUs) directly impacts indoor comfort. However, in commercial buildings, hospitals, hotels, and other settings, AHUs inevitably encounter various faults, leading to issues such as abnormal airflow, insufficient cooling, or water leakage. Mastering scientific troubleshooting methods not only helps resolve problems quickly but also extends equipment lifespan and reduces maintenance costs.
Common Issue 1: No Airflow or Abnormal Air Volume
When an AHU has no airflow, the first step is to check whether the power supply is normal-if there is a phase loss or motor burnout, immediate repair is required. If the airflow is weak, possible causes include reverse fan rotation or excessive system resistance, which can be resolved by adjusting the power phase or cleaning blocked ducts. Conversely, if the airflow is too strong, reducing fan speed or replacing the unit model may be necessary.
Strategies for Insufficient Cooling
A decline in cooling capacity is often related to abnormal refrigerant temperature or flow rate. Check whether the chilled water temperature meets design standards and inspect pipes for blockages. If insufficient airflow leads to poor cooling, increasing the supply air volume can improve performance. Additionally, regularly clean the heat exchanger fins to remove dust buildup and ensure efficient heat transfer.
Dealing with Water Leakage and Noise Issues
Water leakage is usually caused by failed baffle plates or poor drainage-replace high-efficiency baffles or clean drain outlets to resolve the issue. For excessive noise, focus on inspecting the condition of fan bearings and impeller balance, replacing components or adjusting installation positions if necessary.
Maintenance Advice: Prevention Is Better Than Repair
Routine maintenance, such as cleaning filters, checking belt tension, and tightening connections, can significantly reduce failure rates. For complex issues, it is recommended to contact a professional team to ensure long-term, efficient operation of the AHU.
Through systematic fault analysis and scientific maintenance, the performance advantages of AHUs can be maximized, providing users with a stable and comfortable environmental experience.