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10.3
Control Buttons
The Control Buttons on the front panel may be used to shut down the UPS completely, turn the
inverter On or Off, restart the UPS after a fault and silence the alarm, as shown in Figure 55. The
function of each button is described in Table 28.
NOTE
To activate a button properly, press and hold until you hear a short beep—about two seconds.
Figure 55 Location of control buttons
LED2
Table 28
Control buttons
Button
(see Figure 55)
EPO
Inverter Off
Fault Clear
Silence On/Off
Inverter On
Liebert NX
2007-01-06
S ingle
80kV A-3X 3
Main
Bypass
LED1
L1-N/L 2
L-N current (A)
71. 4
Frequency (HZ)
59. 9
LED4
LED5
L-L voltage (V )
480
P owerFactor
0. 99
Input disconnect closed
LED3
Output disconnect closed
Bypass abnorm al
STATUS
F1
F2
Completely shuts down the UPS, including the static switch.
CAUTION: Use caution before pressing the Emergency Power Off (EPO) button. This button
completely shuts down the unit and cuts off power to the critical load.
Press this button to shut down the inverter during operation. The load will be transferred to
static bypass.
After the UPS shuts down due to a fault and the alarm condition has been resolved, press
this button to clear the fault and restart the UPS.
Press this button once to silence the alarm buzzer when an alarm is active. Any new fault will
sound the buzzer again.
If the alarm buzzer is not beeping, press this button to test the alarm sound.
Press this button to start the inverter and transfer from static bypass to inverter.
NOTE: If the inverter is not ready, this will not activate the UPS.
09:20:37
Norm al
Output
L 2-N/ L3
L 3-N/ L1
70.8
71.3
59.9
59.9
EPO
480
480
0. 99
0.99
INVER TER OFF
01-06 09:15
SILENC E ON/ OFF
01-06 09:15
01-06 09 :15
INVER TER ON
?
F3
F4
HELP
Function
82
Operator Control and Display Panel
Button cover
EPO button
Inverter Off button
Fault Clear button
FAULT C LEAR
Silence On/Off button
Inverter On button
Liebert
®
™
NX
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