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Page 33
9PX 1-3 KVA US_EN
ENGLISH
5. Operation
Low-battery warning
• The indicator illuminates solid.
• The audio alarm beeps every three seconds.
The remaining battery power is low. Shut down all applications on the connected equipment because
automatic UPS shutdown is imminent.
End of battery backup time
• LCD displays "End of backup time".
• All the LEDs go OFF.
• The audio alarms stops.
Bypass mode
In the event of a UPS overload or internal failure, the UPS transfers your equipment to utility power.
Battery mode is not available and your equipment is not protected; however, the utility power continues
tobepassivelylteredbytheUPS.The
indicator illuminates.
Depending on overload conditions, the UPS remains in Bypass mode for at least 5 seconds and will stay
in this mode if three transfers to Bypass occur within 20 minutes.
The UPS transfers to Bypass mode when:
• the user activates Bypass mode through the front panel.
• the UPS detects an internal failure.
• the UPS has an overtemperature condition.
• the UPS has an overload condition listed in table 6 on page 42.
TheUPSshutsdownafteraspecieddelayforoverloadconditionslistedintable6onpage42.
The UPS remains on to alarm the fault.
5.5 Return of AC Input Power
Following an outage, the UPS restarts automatically when AC input power returns (unless the restart
function has been disabled) and the load is supplied again.
5.6 Setting High Efciency mode
InHighEfciencymode,theUPSoperatesnormallyonBypassandtransferstoOnline(orBattery)modein
lessthan10mswhenutilityfails.TransferstoHighEfciencymodewillbeactiveafter5minutesofBypass
voltage monitoring: if Bypass quality is not in tolerance, then the UPS will remain in Online mode.
Eaton recommends to use the HE mode only to protect IT equipment.
TosettheHighEfciencymode:
1. SelectSettings,In/Outsettings,andHighEfciencymode.
2. SelectEnabledandEntertoconrm.
3. TheUPStransferstoHighEfciencymodeafter5minutes.
5.7 Conguring Bypass settings
ThefollowingsettingsareavailableforconguringBypassoperation.
Changing the settings changes UPS behavior and may result in decreased protection.
Bypass Voltage Low Limit
The default disables a transfer to Bypass if the measured bypass voltage level is below the nominal output
voltageminus20%.Youcancongurethesettingforanothervoltagevalue.Thissettingcanbeoverruledby
the “Qualify Bypass” setting.
Bypass Voltage High Limit
The default disables a transfer to Bypass if the measured bypass voltage level is above the nominal output
voltageplus15%.Youcancongurethesettingforanothervoltagevalue. This setting can be overruled by
the “Qualify Bypass” setting.
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