Chapter 3: System operation 
136  Vigilant VS1 and VS2 Technical Reference Manual 
System LEDs 
LEDs indicate system events and system operation. 
Table 35: System LEDs 
LED Description 
Fire Alarm  Red LED. Flashes when there is an active alarm event on any loop. 
On steady once acknowledged. 
Trouble  Yellow LED. Flashes when there’s a fault with a monitored circuit or 
system component or when a circuit is disabled. On steady once 
acknowledged. 
Sup  Yellow LED. Flashes when there is an active supervisory event on 
any loop. On steady once acknowledged. 
AC Power  Green LED. On when the panel has AC power. 
Disable  Yellow LED. Double-flashes when there is a disabled circuit or alarm
relay. 
Ground Fault  Yellow LED. On steady during an active ground fault. 
Test  Yellow LED. Flashes when performing an audible walk test. Steady 
indicates a silent test. 
Monitor  Yellow LED. Flashes when there is an active monitor event on any 
loop. On steady once acknowledged. 
Service Detector  Yellow LED. Indicates that detector needs servicing. 
Signal Silence  Yellow LED. On steady indicates that NAC circuits are turned off but 
the panel is still in alarm. 
Remote Disconnect  Yellow LED. On steady indicates that the CMS devices (dialer and 
network card) are disabled or that the alarm relay is enabled or 
disabled when the dialer is set to modem only. 
Drill  Yellow LED. Indicates that the panel is in drill. 
Reset  Yellow LED. Indicates that the panel is going through a reset. 
Panel Silence  Yellow LED. Indicates that the panel has been silenced during an 
active trouble, supervisory, monitor, or alarm event and indicates 
that new event activations have been acknowledged. 
User keys  Yellow LED. Indicates that the programmed key function is active.