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通風管道生產線設備沖口模具及剪板刀不能動作，可能是電氣箱控制液壓電磁閥的連接線斷線，可能是電氣箱中間繼電器損壞，觸摸屏自動加工頁面顯示為不沖口狀態或電磁閥卡滯。處理：檢查機器的電氣線路或設備是否損壞，及時更換修理。

The punching mold and cutting blade of the ventilation duct production line equipment cannot move, which may be due to a broken connection line of the hydraulic solenoid valve controlled by the electrical box, a damaged relay in the middle of the electrical box, a touch screen automatic processing page showing no punching status, or a stuck solenoid valve. Handling: Check if the electrical circuits or equipment of the machine are damaged, and replace and repair them in a timely manner.

通風管道翹角及彎頭角度不準：矩形框通風管道兩相對性平面、兩邊面不平行;折角不豎直;直線不相同;咬口不緊。危害：會使風管連接受力不均勻，安裝后的風管不平直，法蘭盤墊片不嚴密，系統漏風，造成空調負荷損失，并且縮短使用壽命。

The deflection angle and bend angle of the ventilation duct are not accurate: the two opposite planes of the rectangular frame ventilation duct and the two sides are not parallel; The folding angle is not vertical; Different straight lines; The bite is not tight. Harm: It can cause uneven stress on the air duct connection, uneven installation of the air duct, loose flange gasket, system air leakage, resulting in air conditioning load loss and shortened service life.

通風管道原材料不合格：板才表面不整平，薄厚不勻稱，有顯著的壓印、裂縫、沙孔、結痂和生銹等狀況;通風管道平面下沉，側邊向外突起，有顯著的形變。危害：運行時風管漏風，中央空調負載提升，另外風管使用壽命和特性被危害。

Unqualified raw materials for ventilation ducts: The surface of the board is uneven, the thickness is uneven, and there are significant imprints, cracks, sand holes, scabs, and rust; The ventilation duct sinks flat and protrudes outward on the side, showing significant deformation. Harm: Air duct leakage during operation, increased load on central air conditioning, and compromised service life and characteristics of the duct.