Upon arrival Salad Bar unit was on and stocked with product. Customer complaints that the temp seemed off they think it might need refrigerant. The box temp was at 38 degrees Fahrenheit. After this happened the compressor kicked on. The unit was searched for leaks. The leak detector did not go off inside the evaporator but it did in the condensing unit area when unit was on. Soap bubbles were used in various places to try and locate a leak no leaks found. The unit satisfied and the the leak detector did not go off at the condensing area . This could be a false reading, the box was satisfied upon arrival and satisfied 2 times while troubleshooting Evaporator air temp was as low as 30 degrees Fahrenheit. At this time the unit's charge seems fine.