BJB

Yes the detector has been walk tested on the panel. As you suggested, a reprogram looks like the answer. Thanks again

Thank you for the replies, the system is an old system, which has worked fine. The detector has been walk tested and shows an intermittent tone on exit, which is correct but don't t sound on entry. The wiring has not been touched and has worked fine for two years, so its not a wiring fault. Could a power failure alter the program? I don't believe there is a setting which programs the sounder as silent on exit/entry.

I have a Scantronic 9448 panel which has a PIR working on the entry/exit zone. On exit the sounder bleeps intermittingly, to show the detector is working. However, on entry the sounder doesn't operate at all, therefore if I forget to turn the panel off, it goes in to full alarm on entering another room. Please suggest solution to the problem