Proline UPS I1000, User Manual

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6.3 Bypass mode
The LCD display in bypass mode is shown in the following diagram.
The information about the utility power, the battery, the UPS output
and the load could be displayed. The UPS will beep once every 2
minutes in bypass mode. The “Bypass” and “01” code indicate the
UPS is working in the bypass mode.
The UPS does not have the backup function when it is in bypass
mode. The power used by the load is supplied from the utility power
via internal filter.
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The Battery mode
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The Bypass mode