I also had the problem that had the system does not react with any Fensteröffung. I further brought NC detector I had ordered me this when ordering the system with the same. What struck me were the Set the accompanying detectors only for 9030 and have covered more models the additional detector. Even after extended testing I came to the result that the system is running with the universal detector without problem. And with the included in the set alarms the system runs very unreliable. For a second object I am now again the risk entered into, and I've just ordered the system with universal detector. Runs smoothly.