Operator Control and Display Panel
43 Liebert
®
eXM
™
6.3 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 28. The
function of each button is described in Table 15.
Figure 28 Control button layout
NOTE
To activate a button properly, press and hold until you hear a short beep—about two seconds.
Table 15 Control buttons
Button
(see Figure 28) Function
EPO
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 the critical load.
INVERTER ON
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.
INVERTER OFF
Press this button to shut down the inverter during operation. The load will be transferred
to static bypass.
FAULT CLEAR
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.
SILENCE ON/OFF
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.
STATUS
F1 F2 F3 F4
HELP
EPO
INVERTER ON
INVERTER OFF
SILENCE ON/OFF
FAULT CLEAR
EMERGENCY
LCD Navigation Keys
EPO Button
Cover
EPO Button
Inverter On
Button
Inverter Off
Button
Fault Clear
Button
Silence
On/Off Button
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