Arrived, checked in with staff. Inspected 2-door reach in standing freezer for defrost issue. Initiated manual defrost to no effect. Inspected sensors and controller. Found controller was programmed for electric heater defrost, but system has hot gas defrost. Changed parameter and retried manual defrost cycle. Hot gas defrost is effective and ice layer was melted away. Per customer request also inspected Traulsen 1-door freezer. Found that it has little to no cooling effect when operating, though motors all appear to be running. Pressures indicate a leak, and one audibly exists on the discharge port. Quoting leak repairs and nitro test to determine if the customer wishes to proceed with repair efforts on this system. 2-door freezer operational at the end of service.