Emerson Remote Monitoring Panel user manual Epo

Message

Description / Suggested Action (if any)

The phase sequence direction of bypass voltage is reversed.

Normally, the phase of phase B lags 120 degrees behind phase A, and the phase of phase C

Bypass Phase Reversed

lags 120 degrees behind phase B.

Verify that the phase rotation of the bypass supply presented to the UPS is correct, and rectify it

if it is found to be in error

Load Impact Transfer

A transfer to bypass occurred due to a large step load. The UPS should recover automatically.

Turn on connected equipment in sequential order to reduce the step loading of the inverter.

The load is on bypass power due to excessive number of transfers that occurred within the last

Transfer Time-out

hour.

The UPS will recover automatically and will transfer the load back to inverter power within an

hour.

Load Sharing Fault

UPS modules within a parallel system are not sharing the load current equally.

DC Bus Abnormal

DC input voltage to inverter beyond limits. Inverter shuts down. Load transfers to bypass.

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

Parallel Board Fault

Malfunction of the paralleling control circuits of this UPS module. Can cause “System Transfer”

to bypass.

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

DC Bus Over Voltage

Check whether there is a fault in rectifier side. If no, then check whether overload occurs.

Restart the inverter after resetting the fault

The parallel cables are not connected correctly in a parallel system.

Parallel Connect Fault

Reset the fault by pressing the “fault clear” button, then restart the inverter by pressing the

“inverter on” button.

Bypass Over Current

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

LBS Active

Load Bus Synchronization is active. The UPS is acting as an LBS master or slave in a dual bus

configuration.

Setting Save Error

History records not saved. (Reserved)

Mains Neutral Lost

AC Input mains reference neutral not detected.

Protocol version clash

Firmware incompatibility between Monitor Board and Digital Signal Processor Board.

Battery ground fault

Battery leakage to ground detected (option)

Inv. Turned On Manually

Manual Turn On via front panel

Inv. Turned Off Manually

Manual Turn Off via front panel

EPO

Emergency Power Off direct access key pressed or external command received

Transfer Confirm

Prompt to press “enter” key to acknowledge that an interrupted load transfer to bypass will

happen.

Transfer Cancel

Prompt to press “ESC” key to avoid that an interrupted load transfer to bypass will happen.

Unit Off Confirm

Prompt to press “enter” key to acknowledge that the UPS will be disconnected from other

paralleled UPS modules.

System Off Confirm

Prompt to press “enter” key to acknowledge that the all paralleled UPS will be disconnected

from the load.

Fault Reset

Fault clear direct access key pressed

Alarm Silence

Silence On/Off direct access key pressed

Turn On Fail

Inverter failed to turn on when Inverter On direct access key was pressed. This may be as a

result of Invalid Operation (Maintenance bypass on) or DC bus or rectifier not ready.

Alarm Reset

Fault clear or Silence On/Off direct access key pressed

Bypass Mode

Load supplied from AC input bypass supply.

Normal Mode

Load supplied from Inverter output through double conversion of the AC mains input supply.

Battery Mode

Load supplied from Inverter output through double conversion of the Battery supply.

Source share mode

Load supplied from Inverter output through shared double conversion of the AC mains input

supply and of the Battery supply.