The EC couldn’t authorize this as it is an improvement and so requires a 75% vote in favor by the OC to install it. So you must have had your chance to contribute to the decision when the vote was taken.
Also it is not the system that is at fault just a few of the sensors and so it will be relatively easy to fix by just replacing the faulty sensors with others that do work properly. If this is a new installation it should be covered by the warranty so get the EC (or yourself) on to the installer to get the faulty sensors replaced.