Emerson 60HZ, 480V Location of control buttons, Button cover EPO button, Control buttons

Operator Control and Display Panel

8.3Control 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 48. The function of each button is described in Table 16.

NOTE

To activate a button properly, press and hold until you hear a short beep—about two seconds.

Figure 48 Location of control buttons

LED2

LED1

LED4 LED5

LED3

STATUS

Liebert NX		2007-01-06		09:20:37
80kVA-3X3		Single		Normal
	Main	Bypass	Output
L-N current (A)		L1-N/L 2	L 2-N/L3	L 3-N/L1
		71.4	70.8	71.3
Frequency (HZ)		59.9	59.9	59.9
L-L voltage (V)		480	480	480
PowerFactor		0. 99	0. 99	0.99
Input disconnect closed			01-06 09:15
Output disconnect closed			01-06 09:15
Bypass abnormal			01-06 09 :15
				?
F1	F2	F3	F4	HELP

EPO

INVER TER OFF FAULT CLEAR

SILENCE ON/OFF

INVERTER ON

Button cover

EPO button

Inverter Off button Fault Clear button

Silence On/Off button Inverter On button

Table 16 Control buttons

Button
(see Figure 48)	Function
	Completely shuts down the UPS, including the static switch.
EPO	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.
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.
	Press this button once to silence the alarm buzzer when an alarm is active. Any new fault will
Silence On/Off	sound the buzzer again.
	If the alarm buzzer is not beeping, press this button to test the alarm sound.
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.

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