MILPOWER SOURCE
110BA1UM, REV(B)
9
6.
Operation, Controls and Indicators (ref. Figures 4 and 5)
6.1
Turning the UPS ON and OFF
In order to turn the UPS ON (after an electrical connection is made), turn ON the Input ON/OFF
switch (4), the Master ON/OFF switch (5) and the remote ON/OFF switch. (The order is not
important). If remote ON/OFF is not used, the connections of J5 (described in para. 8.3) should be
installed before the unit is turned on.
When the Master ON/OFF switch (5) or the remote ON/OFF switch are turned off, the internal
contactors open and disconnect both the input and the output of the UPS and it turns OFF.
When the UPS operates, turning off the Input ON/OFF switch (4) disconnects the UPS from the AC
input, and the UPS then runs on battery power only.
To turn the UPS off, the Master ON/OFF switch or the remote ON/OFF switch must be in the OFF
position. (It will automatically disconnect the input connector too).
Note: The UPS will not start on battery power (to avoid battery discharge during shipping and
storage). Hence, the Input ON/OFF switch must be ON and AC voltage must be present at the input
in order to start the UPS.
When a remote control of the UPS is desired, the Input ON/OFF and the Master ON/OFF switches
on the front panel should be both in the ON position. Turning the remote ON/OFF switch ON and
OFF will turn the UPS ON and OFF. (Please see paragraph 8.3).
6.2
Visual Indicators
6.2.1
Normal Operation
When the UPS is running on AC input power and both Master and Input switches are ON, the two
bar graphs (17, 18), the green Input OK LED (7) and the green Output OK LED (9) are on.
The Load Level Bar Graph (17) indicates the loading percentage of the UPS. 100% load is equal to
1500W of output power. The lower six positions of the Load Level Bar Graph (15% to 75%) are
green. The next three positions (80%, 110%, 120%) are orange and the two uppermost positions
(130% and 140%) are red. The colors do not have any special significance and are only intended to
assist fast scanning of the load level.
The Battery Charge Bar Graph (18) indicates the percentage charge level of the battery. 100%
signifies that at least 10 minutes of full load will be supported by the battery, 50% signifies
5 minutes at full load and so on. Lower loads result in longer expected battery operation time.
When the battery is being charged, the uppermost active segment of the Battery Charge Bar Graph
blinks to indicate that charging is on.
6.2.2
Standby Mode
When the yellow Output Standby LED (8) is on, the UPS is in the Standby Mode. In this Mode the
DC-AC inverter is OFF and the output contactor is open, but all other function of the UPS are active
(including battery charging and RS-232 communication port). The UPS reaches this mode when
command by the RS-232 or the “dry relays” into this mode.
