Issue
What does it mean when the Power LED Flashes and the System LED is ON Steady?
Solution
The POWER LED will be on steady whenever nominal AC and battery power is present. It will flash during an AC fail condition or a low/missing battery condition.
The SYSTEM FAULT LED will light whenever the system has detected a problem with its wiring or internal circuitry. It remains lit even when the sounders have been silenced. It will turn off only when the underlying system fault has been corrected.
Part numbers D7022, DS9422