Operation
GUPS 2400A
–107 Operation Manual
3-5
3.7
Start-Up and Shutdown Sequences
To run the GUPS 2400A-107 from an AC input, perform the following steps:
1.
Turn on the AC input circuit breaker located on the front panel.
2.
Wait approximately 10 seconds for completion of the start-up routines. During this
time, the GUPS performs a self-test to assure proper functionality, and the rectifier
undergoes a soft-start so that current surges on the AC input are prevented.
3.
After the start-up delay, the inverter will turn on (fan will be energized), but the
output will be off. Also, the charger will be on to charge the internal battery.
4.
To turn ON the output, press the OUTPUT ON switch. The output relay will close
and connect the inverter to the load. The inverter will momentarily turn off prior to
closing of the output relay to prevent switching load current with the relay.
If the AC input voltage exceeds the allowed range, the unit will draw power from
the internal battery and continue to run until the battery is depleted. If the AC input
returns to the allowed range, and low battery shutdown of the inverter has not yet
occurred, the unit will again draw power from the AC input and also recharge the
battery with the battery charger.
5.
To turn OFF the output, press the OUTPUT ON switch again; the switch has a
alternating ON/OFF action. The inverter will momentarily turn off and the output
relay will open. The inverter will again turn on after the relay is open. The inverter is
turned off while the relay is opening to prevent switching load current with the
relay.
If the AC input voltage exceeds the allowed range while the output is turned off, the
unit will shut down; the inverter, charger, and all control circuits will be turned off.
3.8
Battery Operation
To run the GUPS 2400A-107 from battery when an AC input is not present or outside the
allowed operating range, perform the following:
1.
The AC input circuit breaker located on the front panel could be either in the on or
off positions.
2.
To turn ON the output, press the OUTPUT ON switch. After a short delay, the
output relay will close and the inverter will start, supplying power to the load. The
unit will run until the battery is depleted. If the AC input returns to the allowed
range, and the AC input breaker is closed, power will be drawn from the AC input
and the battery charger will recharge the battery.
CAUTION!
If the battery module is not inserted when the unit is started, all
front panel LED’s will indicate RED, and the unit will not operate.
