Page 164.OPERATION4.1 Display and ButtonsFig. 4-1 Control PanelThe following tables shows the buttons, LCD indicator and LED indicator status and description:Table 4-1 Control Buttons FunctionsThe Button Function IllustrationTurn on If the UPS is in standby or bypass mode, press >2s, the buzzer will beep once, then the UPSsystem will be turned on.Turn off If the UPS is in line, battery, HE or battery test mode, press >3s, the buzzer will beep once, thenthe UPS will be turned off.Transfer If the UPS is in fault mode, and the fault cause has disappeared, press >2s, the buzzer will beeponce, fault will be cleared and UPS will turn to standby mode.Function keyBattery test on line mode,Press the button >2sMute: Press the button >2sDown to next page: Press the button<200msTable 4-2 LED indicatorLED name Colour DescriptionLine Green It indicates the utility is normalBattery Yellow It indicates the input is connected with battery, and theinput power is supplied from the battery.Bypass Yellow It indicates the UPS is in bypass mode, the load current isdirectly supplied from the utility powerInverter Green It indicates that the inverter is OK and the load is suppliedfrom the inverter.Note: After UPS power on, all LEDs will be lightened for 2 seconds, and then turn to normal status. When UPS is turning on, 4LEDs will be lightened one by one until the UPS is turned on successfully.⊙:Utility is normal●: Lightened constantly★: Flashing every 4s◇: Depended on the fault status□: Depend on the original displayLED Line Battery Bypass InverterNo Output mode ⊙Bypass mode ● ●Line mode ● ●Battery mode ● ●Battery test mode ★ ●Fault mode □ ◇Warning □ □ □ □