I'm not sure if I've seen that system. When powered on, our remote power switches will flash for several seconds. It's an indicator that the system may not be ready for use yet. (Mostly a delay in the power amps before they connect the speakers.) It's about 10 seconds or so. This is not a true status, but just something programmed into the control system and the indicator may or may not match the actual functioning of the system. In one of our chapels, the system is functioning while the power switch is still flashing.
I haven't timed it. I've never seen anything labeled as an alarm.
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