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System Fan
Fail
System Fan
Fail
Alarm NO YES NO YES
A fault in the designated Fan motor has
occurred. This condition only causes an
alarm, but if not promptly corrected it could
cause an equipment over-temperature
condition that would shut down the UPS
Module. Check the Fans for proper
operation. Contact Liebert Global Services
to replace a fan.
EPO Latched EPO Latched Alarm NO NO NO YES
During start up the EPO switch is sensed as
being activated. Startup is inhibited until the
alarm is cleared. Clear the latched EPO via
the push-button switch located on the
SWGR Board, then perform start up.
SBS
Unable
SBS Unable Alarm NO NO NO YES
The UPS output is not synchronized to the
bypass power source, the static bypass
switch is disconnected, or it has failed
internally. Emergency and overload transfer
to the bypass source is not available. If the
module does not have a manual disconnect
switch, open and re-close the static switch
fuseholder. If the alarm conditions are
automatically corrected, reset the alarm to
clear it. Contact Liebert Global Services if
the alarm stays on.
Transfer To
Byp OK
Transfer To
Bypass OK
Alarm YES YES NO YES
Shows after a successful transfer to
Bypass. Display is only momentary.
Low batt
capacity
Reduced
Battery
Capacity
Alarm YES YES NO YES
Occurs on systems with multiple battery
cabinets. Indicates that at least one battery
breaker is on and one or more battery
breakers in the string are off. In this state,
the calculations for battery time remaining
and End of Discharge are adjusted
accordingly.
Inv Off by
User
Inv Off by User Alarm YES YES NO YES
The User has turned the inverter off through
the front panel. Puts data into the event
history log.
Batt Low
Warning
Battery Low
Warning
Alarm YES YES NO YES
With the battery breaker closed, the UPS
has determined that the DC bus voltage
has reached the user settable “Battery Low
Warning” set point. Complete the controlled
shutdown of the critical load. Reset the
alarms if the input power is restored before
shutdown.
Batt Test
Failed
Battery Test
Failed
Alarm YES YES NO YES
With the battery breaker closed, the battery
has failed the self-test. Momentary display.
Sets flag in the event history log
Batt Test
Passed
Battery Test
Passed
Alarm NO NO NO YES
With the battery breaker closed, the battery
has passed the self-test. Momentary
display. Sets flag in the event history log
Config
Modified
Config
Modified
Alarm NO NO NO YES
The User has modified and saved one or
more settings on the configuration screen.
Momentary display. Sets flag in the event
history log
Table 7 Alarms, functions, and corrective actions (continued)
Actual
Alarm/fault
Name
Displayed
On Front
Panel
Description
of Alarm/
Fault
Fault
Or
Alarm
Latch
Mask
Dial
Mask
Freeze
Mask
Event Log
Mask Meaning and Corrective Action(s)