System Overview (Cont'd)13Note: If a carbon monoxide detector develops a low battery, a“Carbon Monoxide Maintenance” message is displayed. To determinewhich zone is causing the problem, go to “Display Faults” todetermine which zone has the low battery indication.User CodesEach user must be assigned a name with a corresponding 4-digit usercode in order to gain access to various features and functions. Usersfor the system are programmed in a central user setup location thatprovides the specific questions for authorization level, partitionassignment, and RF button assignment.Extended FunctionalityExtended functions are advanced functions that can be accessedthrough a standard alpha keypad or through the console emulationmode on your TouchCenter touch screen. Refer to your Control PanelUser Guide for these features.LED OperationThe TouchCenter has three LEDs labeled - ARMED, READY andMESSAGE. The ARMED LED is red, READY LED is green andMESSAGE LED is yellow. Each LED's on and off state has differentmeanings as described below.LED DESCRIPTION*ARMED ON – Security system is armed.OFF – Security system is not armed.*READY ON – Security system is disarmed and ready to arm.OFF – Security system is armed or disarmed but not ready. Ifdisarmed, faults or troubles are present.MESSAGE(Voice modelsonly)FLASHING – The system contains new message(s) for theUserOFF – No new messages.*Note: If the EN50131 Display feature is enabled, the "Armed" and"Ready" status LEDs turn OFF until a valid user code is entered.Safe ModeThe TouchCenter contains a Safe Mode of operation. In the rare eventthat the TouchCenter cannot successfully communicate in its graphicmode with the control panel, the Safe Mode is a backup mode thatensures that you can communicate with your system.