UPS OPERATING INSTRUCTIONSEaton 9395 550/275 UPS (225–550 kVA) Installation and Operation Manual 164201716 Rev 2 www.eaton.com/powerquality 7-37.2.1 Status IndicatorsThe four symbols on the right side of the control panel are status indicators. Thesecolored light emitting diode (LED) lamps work with the alarm horn to let you know theoperating status of the UPS.Table 7‐1 describes the status indicators.Table 7‐1. Status IndicatorsIndicator Status DescriptionGreenOn The UPS is in Online mode, operating normally. The power module is supplying power to the critical load.Off The UPS is turned off.YellowOn The UPS is in Battery mode. Because Battery mode is a normal condition of the UPS, the Online indicatoralso remains illuminated.YellowOn The UPS is in Bypass mode. The critical load is supported by the bypass source. The Online indicator is notilluminated when the system is in Bypass mode.RedOn The UPS has an active alarm and requires immediate attention. The LCD shows the highest priority activealarms. All alarms are accompanied by an audible horn. To silence the horn, press any control panelpushbutton once. The Alarm indicator may be illuminated along with other indicators.Flashing There is a new UPS alarm condition. The indicator flashes until acknowledged by pressing any controlpanel pushbutton once.7.2.2 System EventsWhen the UPS system is running in Online mode, it continually monitors itself and theincoming utility power. In Battery or Bypass modes, the UPS may issue alarms to letyou know exactly what event caused the change from Online mode. System eventson the UPS can be indicated by horns, lights, messages, or all three.Select EVENTS from the menu bar on the main menu screen to look at the activeevents screen. This screen shows any currently active alarms, notices, or commands.For more information on using the events screen, see paragraph 7.2.6 on page 7-6. System Event Horns – The system event horn beeps to alert an operator that anevent needing attention is taking place. The horn cycles at a half-second rate. System Event Indicators – The status indicators on the UPS control panel work withthe event horn to let the operator know when the UPS is operating in any modeother than Online. Only the Online indicator is visible during normal UPS systemoperation. The other indicators illuminate to indicate alarms or events. When analarm occurs, first check these indicators to see what type of event has takenplace. For descriptions of the status indicators, see paragraph 7.2.1. System Event Messages – When a system event occurs, a message appears on theLCD in the UPS status area. This message is also written to the Active Events Logand may be added to the History Log. The messages are divided into fourcategories: alarms, notices, status, and commands.
