GST200-2/1 Intelligent Fire Alarm Control Panel Installation and Operation Manual S/C FLT/DIS: Yellow. It flashes when SOUNDER CIRCUIT OUTPUT is in fault condition. It illuminates when SOUNDER CIRCUIT OUTPUT is disabled. It goes out automatically after the fault or disabled condition is cleared. SOUNDER FLT/DIS: Yellow. It flashes when any loop sounder is in fault. It illuminates when any loop sounder is disabled. It goes out when the fault or disabled condition is cleared. DIRTY DETECTOR: Yellow. It illuminates when any smoke detector is dirty. It goes out when the FACP is reset. EVACUATE: Red. It illuminates when EVAC key is pressed for evacuation. It goes out until the FACP is reset or silenced. 3.1.3 Description of Keys ACK/MUTE: Pressing this key will manually acknowledge an alarm and silence the FACP. If new alarm comes, the FACP will sound again. In PAS (Positive Alarm Sequence) mode, pressing this key in 15 seconds after the alarm will start the second-stage delay. SILENCE: For silencing all sounders in the system, and lighting the SILENCE LED. This key requires operator password. EVAC: For starting all sounders in the system, and lighting the EVACUATE LED. This key requires operator password. RESET: For clearing all alarm messages, all detector alarms, and all outputs in order to reset the FACP to normal state. This key requires operator password. BROWSE: Pressing this key will enter device-browsing screen to browse devices by loop, by zone or by group, to check zones in test, to browse definition of communication devices, to browse definition of ZCP or to browse cause and effect equations. LOG: For searching and browsing history records. MODE: Pressing this key (operator password required) can enter setup screen to set contrast, message display mode, printing mode, pre-alarm mode, and manual start or stop mode. VIEW FAULT: Pressing this key can check all fault messages if the LCD is not displaying fault messages. TEST: Pressing this key can enter test setup screen to self-test the FACP, to set a zone into test mode, to set a zone to exit test mode, and to set all zones to exit test mode. This key requires operator password. LOCK: Locking the keypad when it is unlocked. VIEW DISABLE: Pressing this key can check all disabled messages if the LCD is not displaying disabled messages. ENABLE/DISABLE: Pressing this key can enter ENABLE/DISABLE screen to enable/disable devices, outputs or delayed outputs, and to delete disablement