This article details the investigation into the cause of two water-source heat pump failures. These particular subject heat pumps, shown in Figure 1, were installed in a commercial building with multiple tenants. They had been in operation for only a short period of time before they started leaking a significant amount of water.
One heat pump had a nominal cooling capacity of 27,000 Btuh, and the other had a nominal cooling capacity of 33,000 Btuh.