Page 235 - Basic Course

KNX BASIC COURSE

Well, a contractor has to safeguard himself against unauthorised warranty claims by the
client, once the installation has been completed. Many electronic data storage media are
completely unsuitable for saving data over a longer period of time. Unfortunately this issue
is often not considered sufficiently. The handling of critical data is often done too
carelessly e.g. ETS projects are frequently created and saved in the same database. This
database is also saved only now and then. If there is a computer crash, e.g. because of a
hard drive defect, or a virus has deleted all the files, big problems arise. One may too
easily assume that the client might still have the data, because it has already been
handed over and could therefore be easily recovered.
But what happens, if the client has in the meantime also lost data? Or the client has
initiated a lawsuit because there are differences of opinion regarding warranty issues
etc.? Without your own evidence, you are in trouble if you are the accused.
Therefore – in his own interest – the contractor should save all data on special media for
long life storage, and moreover store it in a safe place, e.g. in a locked vault at a bank. In
large projects, where small mistakes can still cause a significant loss of money, it is
recommended – even, if it costs money – to have the data legally certified, sealed and
then deposited at a bank. In case of warranty issues, the validity of this data can then not
be put into question.

Home and Building Management Systems KNX Association
KNX Project Design with ETS: Advanced ETS4_Planning complex_E0411c 59/59