Unicont SPb Ltd Technical Documentation CH-105Page 139. Controls and indicationABC has the following controls and indicators: control keys, three light-emitting diodesindicating the state and operation mode of ABC and two digital light-emitting diode indicators(refer to Figure 9).1. Control keys are intended for adjustment of ABC, acknowledgement of sound andswitching of indication display modes (refer to the table with functions of ABC control keys,Table 5).Table 5 Functions of ABC control keysKey Function“SELECT” Button for selection of main menu items.“▲” and “▼” Buttons for selection of possible options of the corresponding of menu item.“SET/Mute” Button for confirming/keeping the selected menu item and disabling(acknowledgement) of sound signal with enabled alarm sound signal.2. Digital light-emitting diodes are intended for display of present values of chargingcurrent and voltage of ABC.3. Light-emitting diodes Failure, Normal and Charging are intended for indication ofpresent operation mode of ABC. (Refer to Table 6, Figure 9).Digital light-emitting diodeindicatorsLight-emitting diodes ofABC stateControl keysCH-105Voltage, V Current, ANormal FailureChargingSELECT SETMUTEFigure 9 Layout of controls and indicators of ABC CH-105Table 6 Colors of light-emitting diode indicators of ABCLight-emittingdiode indicator FunctionCharging(yellow)Activated during the main charging phase of AB, i.e. when ABC is in currentstabilization mode (refer to the graph of charging current and voltage curves,Figure 1).Normal (green)Activated during the terminal charging phase of AB, i.e. when ABC is in voltagestabilization mode (at this moment the battery voltage reaches the voltage valueset by the user, refer to the graph of charging current and voltage curves, Figure1).