Fault identification method and device for online water quality monitor

The invention discloses a fault identification method for an online water quality monitor. The fault identification method comprises the steps: acquiring a current state of a preset component in an online water quality monitoring analyzer; comparing the current state with a preset state under the normal operation condition of the preset component; judging the preset component with the current state different from the preset state as an abnormal component; and according to the current state of the abnormal component, identifying a fault reason of the online water quality monitoring analyzer. The fault identification method of the online water quality monitor can timely and effectively judge the fault point of the monitor and feed back the fault point to maintenance personnel, thereby facilitating troubleshooting of the fault point and improving the efficiency of field maintenance. The invention further discloses a fault identification device of the online water quality monitor, and the fault identification dev