Power Walker VFI 10000CP 3/3 Instruction Manual page 27

AC mode Description
LCD display
ECO mode Description
LCD display
When the input voltage is within acceptable range, UPS will provide pure
and stable AC power to output. The UPS will also charge the battery at AC
mode.
When the input voltage is within voltage regulation range and ECO mode is
enabled, UPS will bypass voltage to output for energy saving.
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