Does the subject want to ask "what is the error code of the Jinbao machine CCOFFO88O66"? Liquid concentration failed. During the self-inspection of solution A, the machine will self-inspect the dialysate concentration at high and low points. According to the flow chart of the liquid circuit, the failure phenomenon is related to the liquid A suction pump, the liquid A pipeline connection port, the liquid A filter, the liquid A conductivity test block, the liquid A conduit connection port, the quick connector and the mixing chamber.