Front Panel; Front Panel Indicators And Control Display - MGE UPS Systems EPS 8000 User Manual

1.5.1

Front 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 1-8: Front Panel Indicators and Control Display.
EPO
Audible alarm
¡
Load not protected
⁄
Operating problem
ı
Battery
Load protected
Í
Inverter on
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.
(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
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.
(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.
(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.
(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.
(item 6) This green pushbutton is used to start the inverter. When it is pushed, the
green "load protected" LED flashes for three seconds, indicating that the start
command has been received. When the inverter has synchronized with the bypass
Introduction
Users Manual
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