Emerson Liebert NX 480V - Manual (Page 104)

UPS Status Messages
96
DC Bus Overvoltage
Rectifier, inverter and battery converter were shut down because DC bus voltage is too high.
Check whether there is a fault in rectifier side. If not, check whether overload occurs.
Restart the inverter after resetting the fault. If fault does not clear, contact Liebert Global
Services at 800-543-2378 for assistance.
Parallel Connect Fault
The parallel cables are not connected correctly in a parallel system.
Reset the fault by pressing the Fault Clear button, then restart the inverter by pressing the
Inverter On button.
If the UPS does not resume normal operation, contact Liebert Global Services at
800-543-2378 for assistance.
Bypass Overcurrent
Bypass current is over limit above 135% rating. The UPS just alarms and does nothing. Refer to
your installation documentation or contact Liebert Global 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 Global 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 Parallel 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
Check UPS output UPS Shutdown, output power-down
Output Disabled UPS Output Disabled
Generator Connected Generator is connected and a signal is sent to UPS
Input CB Open Input CB is Open
Input CB Closed Input CB is Closed
Bypass CB Open Bypass CB is Open
Bypass CB Closed Bypass CB is Closed
Output CB Open Output CB is Open
Output CB Closed Output CB is Closed
Maint. CB Open Maintenance CB is Open
Maint. CB Closed Maintenance CB is Closed
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 the UPS was shut down at end of discharge, inverter auto starts when utility is restored
BCB closed BCB closed from dry contact signal
BCB open BCB open from dry contact signal
Table 36 UPS status messages
Event Message Description / Suggested Action (if any)