Liebert NX 10kVA Installation Manual page 24

3. Close CB1.
The bypass contactor (M2) closes automatically and the LCD begins to show startup screens.
The Rectifier indicator flashes green while the rectifier is starting up. It stops flashing and
becomes solid green about 30 seconds after the rectifier enters the normal operation state.
After initialization, the bypass static switch closes.
Because output switch SW1-A is still open, the UPS
channels power through Maintenance Bypass Supply
line (SW1-D). The bypass indicator extinguishes, pro-
vided that the bypass is normal.
The opening display is shown at right.
The UPS Mimic display indicators will be:
Indicator State
Rectifier Off
Battery Off
Bypass Off
Inverter Off
Load Off
Alarm Off
WARNING
!
Do NOT turn the rotary switch until the rectifier indicator stops flashing green.
4. Turn the rotary switch to BYPASS.
Indicator
Rectifier indicator
Battery indicator
Bypass indicator
Inverter indicator
Load indicator
Alarm indicator
The maintenance switch SW1-D opens and output switch SW1-A closes. The UPS powers from
static bypass instead of from maintenance bypass. The bypass and load indicators turn on. The
design of the rotary switch ensures uninterrupted output.
5. Turn the rotary switch to NORMAL, then 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 transfers from bypass to inverter, the bypass indicator turns off and the inverter and load
indicators turn on.
The UPS is operating normally. The UPS Mimic display indicators will:
Indicator
Rectifier indicator
Battery indicator
Bypass indicator
Inverter indicator
Output indicator
Alarm indicator
State
Green
Off
Green
Off
Green
Amber
State
Green
Off
Off
Green
Green
Green
18
Electrical Connections
F1 F2 F3 F4 HELP