Lowell UPS9 Series Manual
Pg. 22
Operating Mode Description
LCD Display
Rack Display
Tower Display
Battery mode
When the input voltage is beyond
the acceptable range or there is a
power failure and alarm is sounding
every 4 seconds, the UPS will
provide backup power from battery .
Bypass mode
When input voltage is within
acceptable range but UPS is
overloaded, the UPS will enter
bypass mode or bypass mode can
be set by the front panel . Alarm is
sounding every 10 seconds .
Standby mode
UPS is powered off without output
power, but the battery is still being
charged .
Fault mode
The UPS is in fault mode when
no output power is supplied from
the UPS and the fault icon flashes
on the LCD display, although the
information from the UPS can be
displayed on the screen .