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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
to be passively filtered by the UPS. T he
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 38.
The UPS shuts down after a specified delay for overload conditions listed in table 6 on page 38.
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 Efficiency mode
In High Efficiency mode, the UPS operates normally on Bypass and transfers to Online (or Battery) mode in
less than 10 ms when utility fails. T ransfers to High Efficiency mode will be active after 5 minutes of Bypass
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.
To set the High Efficiency mode:
1. Select Settings, In/Out settings, and High Efficiency mode.
2. Select Enabled and Enter to confirm.
3. The UPS transfers to High Efficiency mode after 5 minutes.
5.7
Configuring Bypass settings
The following settings are available for configuring Bypass operation.
Bypass Voltage Low Limit
The default disables a transfer to Bypass if the measured bypass voltage level is below the nominal output
voltage minus 20%. Y ou can configure the setting for another voltage value. T his setting can be overruled by
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
voltage plus 15%. Y ou can configure the setting for another voltage value. This setting can be overruled by
the "Qualify Bypass" setting.
9PX 1-3 KVA EU_EN
indicator illuminates.
5. Operation
Page 29
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