Liebert NX User Manual page 106

After initialization, the bypass SCR closes. Because the
output circuit breaker is still open, the UPS channels
power through the Maintenance Bypass Supply line
(CB3). The bypass indicator extinguishes, provided that
the bypass is normal.
The opening display is shown in the figure at right.
The UPS Mimic display indicators will be:
Indicator
Rectifier indicator
Battery indicator
Bypass indicator
Inverter indicator
Output indicator
Status indicator
• Close CB5 (CB1, CB2, CB3 and CB5 are closed).
• The Maintenance Bypass supply is now in parallel with the UPS Static Switch supply.
• Verify that the Bypass indicator is Green, then open CB3.
The UPS powers from static bypass instead of from maintenance bypass. The bypass and load
indicators turn on. The design of the hardware and software ensures uninterrupted output.
3. Close external battery circuit breaker.
After the UPS detects that the battery is connected, the red battery indicator extinguishes
moments after the battery charger starts operation.
The UPS Mimic display indicators will be
Indicator
Rectifier indicator
Battery indicator
Bypass indicator
Inverter indicator
Output indicator
Status indicator
4. Press the INVERTER ON control button for 2 seconds.
The inverter will start and the inverter indicator will flash green. After the inverter is ready, the
UPS will transfer from bypass to inverter, the bypass indicator will turn off and the inverter and
load indicators will turn on.
The UPS is operating normally. The UPS Mimic display indicators will:
Indicator
Rectifier indicator
Battery indicator
Bypass indicator
Inverter indicator
Output indicator
Status indicator
State
Green
Red
Off
Off
Off
Off
State
Green
Off
Green
Off
Green
Amber
State
Green
Off
Off
Green
Green
Green
96
Operating Instructions
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