UPS Status Messages

Table 36 UPS status messages

Event Message

Description / Suggested Action (if any)

 

 

 

Rectifier, inverter and battery converter were shut down because DC bus voltage is too high.

DC Bus Overvoltage

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.

 

 

 

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

Parallel Connect Fault

Inverter On button.

 

If the UPS does not resume normal operation, contact Liebert Global Services at

 

800-543-2378 for assistance.

 

Bypass current is over limit above 135% rating. The UPS just alarms and does nothing. Refer to

Bypass Overcurrent

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

Manual Turn On via front panel

manually

 

Inverter turned Off

Manual Turn Off via front panel

manually

 

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

 

 

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Emerson 480V user manual Epo, Emergency Power Off
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480V specifications

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In summary, Emerson 480V power systems are a leading solution for industrial power distribution, characterized by their scalability, smart technology integration, energy efficiency, robust build quality, and user-friendly operation. These attributes make them a valuable investment for any organization aiming to improve its electrical management and operational performance.
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