What should I do if there's an open zone or trouble condition displayed on my ADT Safewatch Pro 3000 system?
When you see the CHECK display indicating a problem, press any key to silence the beeping and check if the faulted zones are intact. If corrected, use your security code plus OFF sequence twice to clear the display; otherwise call for service.
From the official ADT Safewatch Pro 3000 manual, page 38
Have a follow-up question?
Answers from the official manual.
Common questions