Emerson NX User Manual

Several menu items can be accessed from the main display screen (see Figure 9). These menu items 

are detailed in subsequent sections.

This is the default screen. It displays the following information:

• Bypass Input Voltage
• Bypass Input Frequency
• Input  Voltage
• Input Current
• Input Frequency
• Output Voltage
• Output  Current
• Output Frequency
• DC Source Voltage
• DC Source Current

System Normal Indicator—When the green status box appears, this means that the system is 

operating normally and that no warning or alarm has occurred. During line power failures (with all 

other conditions being nominal), this box is replaced by a yellow triangle.
Warning Indicator—This indication is activated by the presence of abnormal conditions which 

could affect the normal operation of the UPS. These conditions do not originate with the UPS, but 

may be caused either by the surrounding environment or by the electrical installation (line power side 

and load side). A description of the active warning(s) can be viewed by clicking on the yellow triangle 

or using the Status button at the bottom of the page.
Fault Indicator—When the red circle with white cross appears, immediate attention should be 

given to the severity of the alarm, and service should be called promptly. A description of the active 

alarm(s) can be viewed by clicking on the Status button at the bottom of the page. 
Regardless of which indicator is active, all available diagnostic information on the unit can be 

displayed by touching this area.
Control Buttons: Start Inverter and Stop Inverter—The touchscreen display features two 

buttons for starting and shutting down the inverter. The start/stop control incorporates a safety 

feature for preventing accidental operation. When the start or stop function for the inverter is 

selected, a pop-up window appears asking for confirmation of the action.
Reset Fault—Reset faults (becomes red when there is a system fault).
Alarm Silence—Silence the buzzer in the case of an alarm.

 

NOTE
If screen is inactive for 30 seconds, the LCD will revert to this page.

BFB

UPS Module

To DC Supply

Module Rectifier
AC Input

Module Bypass 
AC Input

UPS Output

DC 

Bus

Critical 

Load