Emerson Liebert NX 50 and 60 Hz User Manual
Page 113
Operator Control Panel and Display
101
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.
UPS Shutdown
UPS Shutdown, output power-down
Check UPS Output
Inverter off during normal startup (diagnostics information only)
Generator Connected
Generator active signal received. Source share mode may be activated pending
UPS settings.
BCB open
Battery Circuit Breaker status (open)
BCB closed
Battery Circuit Breaker status (closed)
Battery Float Charging
Battery status (Float charge mode)
Battery Boost Charging
Battery status (Boost charge mode)
Battery Discharging
Battery status (discharge mode)
Battery Period Testing
Automatic periodic battery maintenance discharge test (20% capacity discharge)
Batt. Capacity Testing
User initiated battery capacity discharge test (100% capacity discharge)
Batt. Maint. Testing
User initiated maintenance discharge test (20% capacity discharge)
UPS System Testing
User initiated UPS self test
Inverter in Setting
Inverter starting up and synchronising
Rectifier in Setting
Rectifier starting up and synchronising
MBP-T cabinet Fan Fault
Maintenance bypass cabinet fans fault.
Ext Input TX Overtemp
External Input Isolation Transformer Over Temperature
Ext Output TX Overtemp
External Output Isolation Transformer Over Temperature
Battery Room Alarm
Environment in Battery Room Needs Attention
Rotary Sw. Test Pos.
Rotary switch is in test position.
Rotary Sw. Normal Pos.
Rotary switch is in normal position.
Rotary Sw. Bypass Pos.
Rotary switch is in bypass position.
Rotary Sw. Maint. Pos.
Rotary switch is in maintenance position.
Battery Contactor Open
Battery Contactor Open
Battery Contactor Close
Battery Contactor Closed
Battery Reverse
Connect the battery again and check the wiring of batteries
No Battery
Check the battery and the wiring of batteries
Table 23
UPS messages
Message
Description / Suggested Action (if any)