HCA Series Installation Manual
Page 10 of 58
V2.15
Supervisory Yellow LED
The supervisory signal indicates that a portion of the building's fire protection system has been disabled
(such as a fire sprinkler control valve being closed and, consequentially, a sprinkler tamper switch being
activated), or, less frequently, that a lower priority initiating device has been triggered (such as a duct smoke
detector). The "Supervisory" indicator requires a "Reset" to clear.
2.3 Local Piezoelectric (PZT) Sounder:
The piezoelectric sounder provides separate and distinct sounds for alarm, trouble, and supervisory
conditions. The PZT sounds are as follows:
Alarm
– On for 1.25 seconds, Off for 0.25 seconds, repeat.
Supervisory
– On for 0.75 seconds, Off for 0.75 seconds, repeat.
Trouble
– On for 0.4 seconds, Off for 0.4 seconds, repeat.
