The causes and treatment of automatic coupling failure of semi-automatic coupler buffer device in Metro Line 2 are briefly described.

1, the automatic coupling function of coupler buffer device is partially damaged, electrical failure, sensor failure and other problems. Solution: Check and repair or replace related parts to repair the fault.

2. The automatic coupling function is affected by the failure of vehicle control system and communication problems, which makes it unable to work normally. Solution: Restart the system, reset the equipment, diagnose and repair the system.

3. The automatic coupling function of coupler buffer device does not meet specific conditions. Processing methods, check the conditions to ensure that they meet the requirements of automatic connection.