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Operator Control and Display Panel
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9.3 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 53. The
function of each button is described in Table 25.
Figure 53 Control button layout
9.4 Alarm Buzzer
The alarm buzzer produces three types of sounds:
• Single beep - when any Control button is pressed
• Single beep repeating every two seconds - the system has a general alarm
• Continuous - the system has a serious fault
If the alarm buzzer makes no sound, the system may be operating properly or the alarm may have
been silenced manually.
NOTE
To activate a button properly, press and hold until you hear a short beep—about two seconds.
Table 25 Control buttons
Button
(see Figure 53) 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
EMERSON
Network Power
TM
F1 F2 F3 F4
HELP
FAULT CLEAR
EPO
INVERTER OFF
S ILE NCE ON /O FF
INVERTER ON
EPO Button Cover
EPO Button
Inverter Off Button
Fault Clear Button
Silence On/Off Button
Inverter On Button
LCD Navigation Keys