Maquet Cardiopulmonary GmbH, FSN-617044, Heater Cooler Unit HCU 40

Degradation of the HCU 40 system drain hose
The failure mode degradation was reported for several HCU 40 system drain hoses made of Polyurethane (PUR) (see Figure 1 and Figure 2). However, on closer inspection, the tank drain hose was affected most. It is located under the water tank and follows an S-shape between the compressor and the transformer to the bottom of the HCU 40. This hose is required for emptying the water tank when replacing the system water or when draining disinfecting or descaling solution. The tank drain hose as well as the other internal blue drain hoses are inside the device and not accessible for the user.