Found Reach-In Cooler unit on and running box temp at 96 degrees. Found system to have no charge in it. Charged with nitrogen and leak checked. Found 3 different leaks on evap coil. Fixed two leaks and created two more small leaks from heat of torches copper on evap coil is too far gone to be fixed. Will need new coil and filter drier. Pulled vacuum and charged unit with factory charge. Box temp is coming down but no telling how long charge will last.