一、卷轴故障
1、 Reel failure
卷轴除了负责将帘板卷起之外，它才存在一个隐性的拉力，有一些高大的成都卷帘门内部会有一个弹簧片存在，主要作用是对帘板施加一个力，禁止卷帘门在关闭的时候弹起，在打开的时候下落。
In addition to being responsible for rolling up the curtain plate, the roller has a hidden tension. There will be a spring plate inside some tall Chengdu roller shutter doors, which is mainly used to exert a force on the curtain plate to prevent the roller shutter door from bouncing up when it is closed and falling when it is opened.
当卷帘门的卷轴出现问题时、弹簧片断裂后，卷帘门就会出现两种故障，卷帘门开启时会自动下落，自动下落时又会自动弹起。
When the roller of the rolling shutter door has problems and the spring plate is broken, the rolling shutter door will have two kinds of faults. When the rolling shutter door is opened, it will fall automatically and bounce up automatically.
遇到这种情况，就直接将卷帘门的控制箱打开，查看弹簧片是否断裂或脱落，断裂了就直接更换，脱落了再将其挂回原位即可。
In this case, open the control box of the rolling shutter door directly to check whether the spring plate is broken or falls off. If it is broken, replace it directly, and then hang it back to its original position.
二、帘板故障
2、 Curtain plate failure
以彩钢条制作的成都卷帘门为例，卷帘门的帘板是由多块彩钢条压制成特制的形状，然后互相拼接在一起的，然后使用铆钉、固定条等将帘板固定在特定的位置里。

Taking Chengdu roller shutter door made of color steel bars as an example, the curtain plate of roller shutter door is pressed into a special shape by multiple color steel bars, and then spliced together, and then the curtain plate is fixed in a specific position by rivets, fixing strips, etc.
当帘板出现故障时，比如固定条磨损严重、铆钉脱落等，就会造成帘板断裂、变形、扭曲的情况，导致卷帘门无法正常使用。
When the curtain plate fails, such as serious wear of the fixing strip and falling off of the rivets, it will cause the curtain plate to break, deform and distort, resulting in the failure of the rolling shutter door.
遇到这种情况，可以直接在松动的卷帘门上打孔，然后重新使用铆钉枪进行固定，然后再更换两边的固定条即可，也可以直接更换变形的帘板，然后再固定。
In this case, you can directly punch holes in the loose rolling shutter door, and then fix it with a rivet gun again, and then replace the fixing strips on both sides, or you can directly replace the deformed shutter plate, and then fix it.
三、导轨故障
3、 Guide rail failure
正常来讲，无论是哪一种卷帘门，两边的导轨内部都是有一层“磨擦条”存在的，这层摩擦条的作用是避免帘板与导轨摩擦而存在的。当卷帘门无法上拉、下拉时，要检查的就是导轨的摩擦条。
Normally, no matter what kind of rolling shutter door, there is a layer of "friction strip" inside the guide rails on both sides. The function of this layer of friction strip is to avoid the friction between the curtain plate and the guide rail. When the rolling shutter door cannot be pulled up or down, the first thing to check is the friction strip of the guide rail.
摩擦条属于易消耗品，经常推拉卷帘门会导致摩擦条损耗，如果没有了摩擦条，卷帘门会跟导轨直接接触，就会出现卷帘门无法上拉、下拉的故障。
The friction strip is a consumable. Often pushing and pulling the rolling shutter door will lead to the loss of the friction strip. If there is no friction strip, the rolling shutter door will be in direct contact with the guide rail, and the rolling shutter door will fail to pull up and down.