Operation LED Indicators (all ADT-LCD40 Series)
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Document 50520 Rev D 7/25/00 P/N 50520:D
2.3 LED Indicators (all ADT-LCD40 Series)
2.3.1 Power
This is a green LED which illuminates if AC power is applied to the
host FACP. The green LED will turn off if AC power to the host
FACP is lost.
2.3.2 Fire Alarm
This is a red LED that flashes when one or more fire alarms occur. It
illuminates steadily when an Acknowledge or Silence switch is
pressed. The Alarm LED turns off when the Reset switch is pressed.
2.3.3 Supervisory
This is a yellow LED that flashes when one or more supervisory
conditions occur, such as a sprinkler valve tamper condition. It
illuminates steadily when an Acknowledge or Silence switch is
pressed. It turns off when the Reset switch is pressed.
2.3.4 Trouble
This is a yellow LED that flashes when one or more trouble condi-
tions occur. It stays on steady when an Acknowledge or Silence
switch is pressed. The LED turns off when all trouble conditions are
cleared. This LED will also illuminate if the microprocessor watch-
dog circuit within the ADT-LCD40 Series is activated.
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