1, CAN communication line is loose or damaged. You can check whether the plug of the communication line is plugged tightly and whether there is mechanical damage to the line. If there is any problem, you can replace or repair the communication line.
2. The host CAN communication interface is faulty. Try plugging and unplugging the interface again or replacing the interface board.
3. The communication rate is set incorrectly. It can be solved by adjusting the host settings.
4, the host program failure. You can try to restart the host or upgrade the host software to solve the problem.
5. If the above methods can't solve the problem, it is recommended to contact the fire equipment maintenance personnel or related manufacturers for maintenance. At the same time, in order to ensure the normal operation of fire-fighting equipment, maintenance and testing should be carried out regularly, and relevant safety operation procedures should be observed.