Check valve fault self-diagnosis system of cold and heat source process water system

The utility model discloses a check valve fault self-diagnosis system of a cold and heat source process water system, which relates to the field of new energy hybrid power tests, and is characterized in that when a water flow switch detects that a water flow direction is a reverse direction, an alarm signal is fed back to an AT89C51 single chip microcomputer through a signal conversion module; a current signal is converted into a voltage signal by adopting an isolation amplifier of an ISOEM series, the collected signal is subjected to operation processing through an operation processing module, an LCD liquid crystal screen is initialized, the display format of the LCD liquid crystal screen is set, water flow direction information is displayed through the LCD liquid crystal screen, and a buzzer alarms along with water flow direction information. Alarm information is synchronously uploaded to a cloud platform in a TCP/IP communication mode and transmitted to a mobile phone terminal of operation and maintenance