1. The motor of fast rolling shutter door does not move or the speed is slow.

故障原因：快速卷帘门的这一故障原因通常是由于断线，电机烧坏，停止按钮未复位，限位开关动作以及大负载引起的。

Fault cause: the fault cause of the fast rolling shutter door is usually caused by disconnection, motor burnout, non reset of the stop button, action of the limit switch and heavy load.

处理方法：检查线路并打开;更换烧毁的电动机;装回按钮或反复按它;推动限位开关滑块使其脱离微动开关触点，并调整微动开关的位置;检查机械部件没有卡纸，卡纸并障碍物。

Treatment method: check the circuit and turn it on; Replace the burned motor; Replace the button or press it repeatedly; Push the limit switch slider away from the microswitch contact and adjust the position of the microswitch; Check that there is no paper jam in mechanical parts, eliminate paper jam and remove obstacles.

2、快速卷帘门控制故障。

2. Fast rolling shutter control failure.

故障原因：继电器接触棒，行程微动开关故障或接触镜变形，滑块紧固螺钉松动，板螺钉是疏松。由于板的移位，滑块或螺母无法随着螺杆的旋转而移动，限制器的传动齿轮断裂，并且按钮的上下按钮被卡住。

Fault cause: relay contact rod, travel microswitch fault or contact lens deformation, slider fastening screw loose, plate screw loose. Due to the displacement of the plate, the slider or nut cannot move with the rotation of the screw, the transmission gear of the limiter is broken, and the up and down buttons of the button are stuck.

处理方法：更换继电器;更换微动开关或触点;固定滑动螺钉并复位板;更换制动器驱动齿轮;更换按钮。链条没有移动。失败的原因：环形链阻塞了十字槽;棘爪无法脱离棘轮;链架被卡住。处理方法：拉直环链;调整棘爪和链条框架的相对位置;更换或润滑销钉。

Treatment method: replace the relay; Replace microswitch or contact; Fix the sliding screw and reset the plate; Replace the brake drive gear; Replace the button. The chain does not move. Cause of failure: the ring chain blocks the cross groove; The pawl cannot disengage from the ratchet wheel; The chain frame is stuck. Treatment method: straighten the ring chain; Adjust the relative position of the pawl and the chain frame; Replace or lubricate the pins.

3.快速卷帘门电动机振动或噪音大。

3. The motor of the fast rolling shutter door has high vibration or noise.

故障原因：制动盘不平衡或损坏;制动盘未拧紧;轴承失油或失效;齿轮啮合不畅，油流失或磨损严重;电动机电流声或振动。

Fault cause: the brake disc is unbalanced or damaged; The brake disc is not tightened; Bearing oil loss or failure; Poor gear meshing, oil loss or serious wear; Motor current, sound or vibration.

处理方法：更换快速卷帘门制动盘或重新调整天平;拧紧制动盘螺母;更换轴承;修理电动机轴输出端齿轮，进行润滑或更换;检查电动机，如果电动机损坏，请更换。

Treatment method: replace the brake disc of fast rolling shutter door or readjust the balance; Tighten the brake disc nut; Replace the bearing; Repair the gear at the output end of the motor shaft, lubricate or replace it; Check the motor. If the motor is damaged, replace it.