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Maintenance
119
DC Bus Abnormal
Shut off inverter due to abnormal DC bus voltage.
Contact Liebert Services at 800-543-2378 for assistance.
System Transfer
The whole paralleled UPS system transferred to bypass at the same time. This message will
appear on the UPS which passive transfer to bypass.
DC Bus Overvoltage
Rectifier, inverter and battery converter were shutdown because DC bus voltage is too high.
Check whether there is a fault in rectifier side. If no, then check whether overload occurs.
Restart the inverter after resetting the fault. If fault does not clear, contact Liebert Services at 800-
543-2378 for assistance.
LBS Active
The LBS setting is active. The UPS is acting as an LBS master or slave in a dual bus
configuration.
Battery ground fault
Battery ground fault from dry contact signal. Contact Liebert Services at 800-543-2378 for
assistance.
Inverter turned On
manually
Manual Turn On via front panel
Inverter turned Off
manually
Manual Turn Off via front panel
EPO Emergency Power Off
Transfer Confirm Interrupted Transfer Confirm
Transfer Cancel Interrupted Transfer is cancel
Unit Off Confirm Unit Turned Off Confirm
System Off Confirm System Turned Off Confirm
Fault Reset Fault Reset
Alarm Silence Alarm Silence
Turn On Fail Turn On Fail
Alarm Reset Audible Alarm Reset
Bypass Mode UPS in Bypass Mode
Normal Mode UPS in Normal Mode
Battery Mode UPS in Battery Mode
Output Disabled UPS Output Disabled
Maint. Disconnect Closed Maintenance Disconnect Closed
Reserved
Output Disconnect Open Output Disconnect Open
Battery Reverse Connect the battery again and check the wiring of batteries.
No Battery Check the battery and the wiring of batteries.
Auto start After UPS was shutdown at EOD, inverter auto starts when utility is restored.
BCB closed BCB closed from dry contact signal.
BCB open BCB open from dry contact signal.
Battery Float Charging Battery is float charging.
Battery Boost Charging Battery is boost charging.
Battery Discharging Battery is discharging.
Battery Period Testing Battery is period self-testing.
Batt. Capacity Testing Battery is capacity self-testing.
Batt. Maint. Testing Battery is maintenance self-testing.
Inverter in Setting Inverter is in parameter setting.
Rectifier in Setting Rectifier is in parameter setting.
Batt. Converter Fault
Battery converter output voltage beyond limits or battery fuse failed. Battery converter shuts
down. Battery backup not available.
Operation Invalid This record is registered following an incorrect operation.
Table 57 UPS status messages (continued)
Event Message Description / Suggested Action (if any)