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Chapter 4: Operation
SYSTEM OVERVIEW
This Line-Interactive UPS protects computers, servers, telecom systems, VoIP
systems, security systems, and a variety of electronic equipment from black-
outs, brownouts, overvoltages, and surges. The AVR function continuously
corrects the voltages, in-between the brownout and overvoltage transfer points
(90 - 150VAC), to a safe usable level. When the UPS is operating in the AVR
mode the audible alarm will remain silent and the AC mode indicator will blink.
During normal AC operation, the UPS will quietly and confidently protect your
system from power anomalies.
The UPS will charge the batteries with the UPS in the on or off position when
the UPS is plugged into the wall outlet and there is an acceptable AC voltage
present (90 - 150VAC). When a blackout, brownout, or an overvoltage condi-
tion occurs; the UPS will transfer to the battery mode, the On Battery indicator
will illuminate and the audible alarm will sound once every ten seconds indicat-
ing that the commercial power is lost or unacceptable. When the commercial
power returns or is at an acceptable level, the UPS will automatically transfer
back to the AC mode and start recharging the batteries. During an extended
outage when there is approximately two minutes of backup time remaining the
audible alarm will sound twice every five seconds. This Low Battery Warning
is informing the user that they should save all open files and turn off their
computer. When the batteries reach the predetermined level the UPS will
automatically shutdown protecting the batteries from over discharging. Once
the commercial power returns and is at an acceptable level the UPS will auto-
matically restart, providing safe usable power to the connected equipment and
start recharging the batteries.
Block Diagram of the Basic Wiring and Internal Circuit Configuration
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TURNING THE UNIT ON/OFF
On / Off / Test Button
When the UPS is connected to an AC source and there is an acceptable AC volt-
age present;
Press and then release the On/Off/Test button during the audible
alarm's first beep to turn the UPS on. UPS will provide an output and the load
will be powered. Then the UPS will perform a five second self-test. Once the
UPS has passed its self-test the UPS will be ready for normal operation.
When the UPS is in the AC mode; Press and then release the On/Off/Test
button during the audible alarm's first beep to turn the UPS off. The UPS will
continue to charge the batteries whenever it is plugged into an AC wall outlet
and there is acceptable AC voltage present.
USER INVOKED SELF-TEST
The user invoked self-test feature is useful to verify the correct operation of
the UPS and the condition of the batteries. With the UPS in the AC mode;
Press and hold the On/Off/Test button until the audible alarm sounds four
beeps, and then release. The UPS will perform a ten-second battery test to
measure the battery's capability to support the connected load. During the
battery test, the UPS will switch to the battery mode and the On-Battery icon
will illuminate and the audible alarm will sound. If the UPS fails a battery test,
one of the icons will remain illuminated and an error code will be displayed
indicating the type of problem. NOTE: The UPS will automatically perform a
self test on start-up.
ALARM SILENCER BUTTON
When the unit is operating in Battery mode, pressing the Alarm Silencer But-
ton will silence the audible alarm. Once the UPS reaches the LBW (Low
Battery Warning) threshold the audible alarm will be re-activated. The audible
alarm cannot be silenced during the LBW alarm or any fault condition. Once
the UPS transfers to the AC mode the audible alarm will be reset to default.
SCROLL BUTTON
Press the Scroll Button to scroll through the UPS parameters. The UPS pa-
rameters are displayed on the LCD screen.
LCD SCREEN
The LCD scrren provides the user with a variety of useful information. The
LCD has a real-time meter to display, in numeric fashion, the following data:
Input Voltage and Frequency
Output Voltage and Frequency
Connected Load KVA and KW
Estimated runtime in the AC and DC mode
Error Codes
Connected Load Capacity Bar Graph
Battery Capacity Bar Graph
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