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Home > News > Project Case Studies > AHU Retrofit Project

AHU Retrofit Project

JULY 17, 2026

Severe vibration during fan operation is commonly caused by loose tower connecting bolts, deformed blades, or jammed pitch mechanisms. It is recommended to shut down the fan immediately for inspection. First, use a torque wrench to tighten all key bolts in a diagonal sequence. If the vibration persists, inspect the blade surface for cracks or deformations. Lastly, check whether the pitch bearing operates smoothly. This article provides a detailed troubleshooting flowchart and safety precautions.

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Three hidden reasons behind “motor overheating” of industrial fans and treatment suggestions

Overheating of a motor is not necessarily due to excessive load. In addition to checking whether the ventilation and heat dissipation channels are blocked, it is also necessary to pay attention to whether the power supply voltage is three-phase unbalanced (with an allowable deviation within ±5%), and whether the resistance at the inlet and outlet pipelines of the fan has increased sharply due to dust accumulation. The article provides a step-by-step troubleshooting method: first measure the current and voltage, then clean the cooling fins, and finally check whether the fan operating point deviates from the rated operating area.

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