PowerWalker VFI 1000RM LCD - Manual (Page 16)

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3.6. Operating Mode Description
Operating mode Description
LCD display
Online mode 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
online mode.
ECO mode Energy saving mode:
When the input voltage is within voltage
regulation range, UPS will bypass
voltage to output for energy saving.
Frequency
Converter mode When input frequency is within 40 Hz to
70 Hz, the UPS can be set at a constant
output frequency, 50 Hz or 60 Hz. The
UPS will still charge battery under this
mode.
Battery mode When the input voltage is beyond the
acceptable range or power failure and
alarm is sounding every 4 second, UPS
will backup power from battery.
Bypass mode When input voltage is within acceptable
range but UPS is overload, UPS will
enter bypass mode or bypass mode can
be set by front panel. Alarm is sounding
every 10 second.
Standby mode UPS is powered off and no output
supply power, but still can charge
batteries.