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The Bypass mode red light on the MBP goes off, indicating that the load is now powered by
the UPS.
Step 12. On the UPS, select Control ➙ Go back normal to put the UPS into Online mode.
Step 13. Check that the UPS is in Online mode by checking its display panel.
The load is now protected by the UPS.
Monitoring the UPS operating mode
The Lenovo UPS front panel indicates the UPS status through the UPS indicators. See "Control panel"
on page 6.
Operating modes: descriptions
Online mode
When the UPS is operating from utility power, the UPS is in Online mode: the
solid. The UPS monitors and charges the battery packs as needed and provides filtered power protection to
your equipment. High Efficiency and Energy Saving settings take the UPS out of online mode to minimize
heat contribution to the rack environment, but reduce the protection of your equipment. See "User settings"
on page 10.
Battery mode
When the UPS is operating without utility power, the alarm beeps once every ten seconds and the
indicator illuminates solid. The necessary energy is provided by the battery packs. When the utility power
returns, the UPS goes to Online mode.
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
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.
indicator illuminates.
indicator illuminates
41
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Chapter 5
Operation
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