Emerson 250-400kVA Manuel D’Utilisation

Table 7 shows alarm and status messages as they appear in Liebert NXL’s touchscreen and in the 

history log, along with a description and recommended actions, if any.
If the recommended action fails to correct the condition, contact your factory-authorized service pro-

vider.
The “Service Telephone Number” can be found by pressing “CONFIG,” “Ratings,” “More>>” on the 

menu bar.

Auto Restart Fail

An Automatic Restart was enabled but has failed 

to complete.

With Automatic Restart enabled, the unit 

automatically restarts after an End of Discharge 

(EOD) event. This alarm means that one of the 

auto restart requirements was true, but failed 

before the restart sequence completed.

For example, one conditional requirement for 

Automatic Restart to occur is that the Rectifier 

Input Voltage must be within acceptable limits. If, 

during the restart sequence, the input voltage 

drops out of tolerance, the Automatic Restart will 

fail.

This alarm is self-clearing. When the condition is 

no longer present, the alarm and any control 

activity tied to the alarm reverts to normal.

Press “SILENCE” to silence the audible alarm.

Check the active events to determine the status of 

the UPS.

If “Auto Restart Fail” is the only alarm present, 

attempt a manual start of the unit by pressing 

“Startup,” “Manual Start,” then following the prompts 

to attempt to place the unit back online.

If the manual start fails, or if there are other alarms 

present that won’t clear, contact your factory-

authorized service provider.

Auto Rexfer Failed

The condition that caused an automatic transfer 

to bypass failed to clear within a specified time 

delay.

An example of a recoverable transfer (one which 

the controls may attempt to recover from 

automatically) is an overload that exceeded the 

overload time curve.

Press “SILENCE” to silence the audible alarm.

Press “RESET” to attempt to clear active events. 

This does not clear the “Auto Retransfer Failed” 

alarm.

If all other alarm conditions clear, attempt a manual 

transfer back to Inverter by pressing “Transfer,” 

“UPS.”

If the transfer is successful, press “RESET” to clear 

this alarm from the Active Event Window. If the UPS 

fails to transfer and the active messages do not 

explain the reason, contact your factory-authorized 

service provider.

Batt CB “#” Open

Battery Circuit Breaker “#” is open.

This status message is self-clearing. When the 

condition is no longer present, the message and 

any control activity tied to the status event reverts 

to normal. (The Liebert NXL has eight battery 

circuit breakers.)

Press “SILENCE” to silence the audible alarm.

Check the status of Battery Circuit Breaker “#”. If it 

is open, the alarm is normal.

If Battery Circuit Breaker “#” is closed, contact your 

factory-authorized service provider.