MGE UPS Systems EPS 7000 user manual Front Panel, Audible alarm

Users Manual

1.5.1Front Panel

The UPS front panel, includes the emergency power off (EPO) pushbutton, the audible alarm, four LEDs that serve as system status indicators, the “inverter on” pushbutton, and the “inverter off” pushbutton. See Figure 1-8.

Figure 1-7: Front Panel Indicators and Control Display.

EPO

On the left side of the front panel, an emergency power off (EPO) pushbutton is provided, with a protective cover to guard against inadvertent operation. This pushbutton, when activated, disconnects the main AC input (mains 1), bypass AC input (mains 2), and battery power to the UPS, and disconnects output power to the attached load.

Audible alarm	(item 1) The audible alarm provides an audible warning to the operator by sounding
	a pulsed “beep” when any of the following conditions occur:
	◗	Load transferred to bypass (mains 2)
	◗	Load supplied via battery
	◗	Operating problem
	During minor alarm conditions, the alarm sounds at a slow rate and a low sound
	level. When the battery approaches the low-voltage shutdown level, the alarm
	sounds louder and at an increased rate. If the inverter shuts down, the alarm
	sounds loudly and continuously.
	An audible alarm reset is located on the hidden panel. See Figure 1-7. Pressing it
	will silence the alarm. Should a higher-level alarm condition occur after the reset
¡Load not protected	has been activated, the audible alarm will sound the new alarm condition.
	(item 2 ) This red LED turns on when any of these conditions occur:
	◗	The load is no longer protected following an inverter shutdown,
		or the opening of the isolation circuit breaker (Q5N).
	◗	The battery circuit breaker QF1 is open, making battery power
		unavailable.
Operating problem	(item 3) This orange LED turns on when an operating problem exists, such as fan
⁄	failure; static switch power supply fault; battery temperature fault;
	overload fault; or bypass AC input (mains 2) out of tolerance. The UPS

continues to protect the attached load.

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Battery	(item 4) This orange LED turns on to indicate that the attached load is
	being partially or completely supplied by the battery. When the main AC
	input (mains 1) fails or is outside tolerance, stored battery energy is
	supplied to the inverter, which in turn supplies the load.
Load protected	(item 5) This green LED indicates that the attached load is supplied by
	the inverter and protected by the battery. During normal operation, this
	LED is the only one that is on.

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