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Chapter 8 Operation
If battery capacity becomes low while in Battery mode, the audible alarm beeps once every 3
seconds. This warning is approximate, and the actual time to shut down might vary
significantly. Shut down all applications on the connected equipment because automatic UPS
shutdown is imminent. When utility power is restored after the UPS shuts down, the UPS
automatically restarts.
Bypass mode
In the event of a UPS overload or internal failure, the UPS powers your equipment directly
from utility power. Battery mode is not available and your equipment is not protected;
however, the utility power continues to be passively filtered by the UPS. The
indicator
illuminates.
Depending on overload conditions, the UPS remains in Bypass mode for at least 5 seconds and
will stay in this mode if three transfers to Bypass occur within 20 minutes.
The UPS transfers to Bypass mode when:
the user activates Bypass mode through the front panel
•
the UPS detects an internal failure
•
the UPS has an overtemperature condition
•
the UPS has an overload condition listed in the Specifications section
•
Note: The UPS stops operating after a specified delay for overload conditions listed in the
Specifications section. However, the UPS remains on to alarm the fault.
Standby mode
When the UPS is turned off and remains connected to the AC source, the UPS is in Standby
mode (X indicator). Depending if Bypass Standby setting is enabled, the output is powered
but not protected. The battery packs recharge when necessary and the communication ports
are powered.
Operating modes: summary
The following table summarizes the characteristics of your UPS unit in each operating mode.
Mode
Load
Batteries
Protection features:
Power failure
Power sag
106
Online
Battery
powered
powered
charging
discharging
yes
n/a
yes
n/a
Bypass
powered
charging
no
no
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
Bypass
Standby
no power
charging
no
no
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