Eaton 9910, User Manual, Page: 29 / 76

OPERATION
Eaton 9910 UPS and EBM User's Guide
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P-164000005 Rev 2
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Operating Modes
The UPS has the following operating modes:
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Normal
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Battery
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Bypass (6000 VA models only)
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Standby
NOTE
(6000 VA models only) If the UPS is unable to continue operating normally, it might
attempt to save data and follow an orderly shutdown sequence. However, some
unrecoverable failures and overload conditions cause the UPS to transfer to Fault mode
without saving data, and turn off immediately to protect the UPS and the load from damage.
Normal Mode
The UPS supplies the load power from utility power. The UPS monitors
and charges the batteries as needed and provides filtered power
protection to your equipment.
Battery Mode
The UPS supplies the load power from battery. The status text flashes,
and the UPS beeps every 5 seconds. When the utility power returns, the
UPS transfers to Normal mode operation while the battery recharges.
Bypass Mode
(6000 VA models only) The UPS supplies the load power through an
automatic internal bypass. Battery mode is not available. The UPS
transfers to Bypass mode when you activate Bypass mode through the
front panel (manual bypass) or when the UPS detects a condition
requiring bypass (automatic bypass).
Standby Mode
When the UPS is turned off and remains connected to a power outlet,
the UPS is in Standby mode. The UPS is not supporting the load but is
ready to assume the load on command.