There may be several reasons for the malfunction of the remote control of the electric roller shutter door:

电池问题：首先，您可以确认一下遥控器电池是否正常工作。尝试更换遥控器电池，确保电池的电量充足，并且正确安装。

Battery issue: Firstly, you can confirm whether the remote control battery is working properly. Try replacing the remote control battery to ensure that the battery is fully charged and installed correctly.

信号干扰：遥控器的操作信号可能会受到其他电子设备的干扰，比如手机、无线路由器等。尝试将其他可能产生干扰的设备关机或移开，并测试遥控器是否能够正常操作。

Signal interference: The operation signal of the remote control may be interfered by other electronic devices, such as mobile phones, wireless routers, etc. Try shutting down or removing other devices that may cause interference, and test whether the remote control can operate normally.

遥控器故障：如果遥控器已经检查过电池和信号干扰，并且仍然失灵，可能是遥控器本身出现故障。此时，建议您联系相关厂家或售后服务，以获取的技术支持和维修指导。

Remote control malfunction: If the remote control has been checked for battery and signal interference and still fails, it may be due to the malfunction of the remote control itself. At this point, it is recommended that you contact the relevant manufacturer or after-sales service center for professional technical support and repair guidance.

门控系统故障：如果您确定遥控器没有问题，可能是电动卷帘门的门控系统出现了故障。此时，您可以检查一下门控系统的电源是否正常，是否有其他异常情况，比如线路连接问题、电机故障等。需要修复故障的话，建议您联系的维修人员来进行维修。

Door control system malfunction: If you are sure there is no problem with the remote control, it may be a malfunction in the door control system of the electric roller shutter door. At this point, you can check whether the power supply of the door control system is normal and whether there are other abnormal situations, such as circuit connection problems, motor faults, etc. If you need to repair the fault, we suggest that you contact professional maintenance personnel for repair.

根据具体情况，您可以逐步排查可能的原因，进行相应的处理。如果问题仍然存在，建议您咨询的技术人员或售后服务，以获取更准确的解决方案。

Depending on the specific situation, you can gradually investigate the possible causes and take corresponding measures. If the problem persists, we suggest that you consult professional technical personnel or after-sales service centers to obtain a more accurate solution.