28 Eaton 9PX Lithium-Ion User Guide DPD-9PX2206—Rev 01
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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. Transfers 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.
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The following settings are available for configuring Bypass operation.
Bypass Transfer out of tolerance
1. Press any button to activate the menu options, then select Settings, Output settings, and Bypass transfer.
2. Select Enabled or Disabled for BP AC NOK, and Enter to confirm. If Enabled, the UPS transfers to Bypass
even if Bypass AC source is out of tolerance, depending on output mode. If Disabled, the UPS output is
shutdown.
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Low battery warning
During discharge, the low battery alarm is activated if the battery capacity goes below 20%. This threshold can
be modified.
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To retrieve the Event log through the display:
1. Press any button to activate the menu options, then select Event log.
2. Scroll through the listed events.
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To retrieve the Fault log through the display:
1. Press any button to activate the menu options, then select Fault log.
2. Scroll through the listed faults.
Setting High Efficiency Mode
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