Chapter 10
Responding to System Events
When the UPS system is running in Normal mode, it continually monitors itself and the incoming utility power. In Battery or Bypass modes, the UPS may issue alarms to let you know exactly what event caused the change from Normal mode. System events can be indicated by horns, lights on the UPS, or both.
Select Active from the Events menu on the LCD screen to look at the Active System Events screen. This screen shows any currently active alarms, notices, or commands.
10.1 System Event Horns
The system event horn beeps according to the type of event it is signifying:
When the UPS detects an alarm that requires your attention, the horn beeps at
When a notice occurs, the horn beeps at
10.2System Event Lights
The status indicators on the UPS Monitor Panel work in conjunction with the event horn to let you know when the UPS is operating in any mode other than Normal. Only the Normal indicator is visible during normal UPS operation. The others light to indicate alarms or events. When an alarm occurs, you should first check these indicators to see what type of event has taken place. (For descriptions of the status indicators, see “Reading the Status Indicators” on page
10.3 System Event Messages
When a system event occurs, a message is added to the Event History Log. A message may also appear on the Monitor Panel of the UPS. The Event History Log contains all system event messages, whether or not they were displayed on the Monitor Panel.
INVERTER MESSAGES - ALARMS | INVERTER MESSAGES - NOTICES |
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Inverter DC Over Voltage | Bypass AC Over Voltage |
Clear Inverter DC Over Voltage | Clear Bypass AC Over Voltage |
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Inverter AC Over Voltage | Bypass AC Under Voltage |
Clear Inverter AC Over Voltage | Clear Bypass AC Under Voltage |
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Inverter AC Under Voltage | Bypass Over Frequency |
Clear Inverter AC Under Voltage | Clear Bypass Over Frequency |
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Inverter Over Frequency | Bypass Under Frequency |
Clear Inverter Over Frequency | Clear Bypass Under Frequency |
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Inverter Under Frequency | Battery DC Under Voltage |
Clear Inverter Under Frequency | Clear Battery DC Under Voltage |
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EATON Powerware® 9315 UPS |
