What method of action does the manual state that the machine will clean kegs? Kegs can be cleaned in many ways. However, a machine is usually designed to clean a keg by only one method. The mass majority of automated keg cleaners are designed to clean kegs chemically (IE caustic). As for the steam (I am assuming you meant steam), the machine will need to be specifically designed for operation with steam. Retrofitting can be done, however, it is usually easier to sell the machine and buy one designed for steam. The machines that I am familiar with, that are designed for steam, will use steam to heat up the cleaning solution and to sanitize the keg after cleaning.
Which KEG-Technik model do you have? Did you purchase this new or used?
When all else fails, forget the hammer. It's time for explosives!