MILPOWER SOURCE
110BA1UM, REV(B)
10
6.2.3
Input AC Failure
When the input AC voltage is below the minimum required for proper operation, the UPS runs on
battery power. During this condition the red Input Fail LED (6) is on, the yellow On Battery Warning
LED (11) blinks, and five seconds after input power loss an audible alarm starts beeping once
every five seconds.
To turn off the audible alarm, press momentarily on the Alarm OFF Push-button (12). When the
button is pressed, a short beep will sound to indicate compliance.
During battery operations, the Battery Charge Bar Graph (18) continuously displays the battery
charge level. When the charge in the battery drops below 35%, the yellow Low Battery Warning
LED (13) starts blinking (indicating that less than 3.5 minutes of full load may be supported by the
battery) and the audible alarm emits two short beeps once every five seconds..
To turn off the audible alarm, press momentarily on the Alarm OFF Push-button (12). When the
button is pressed, a short beep will sound to indicate compliance.
When the Battery Charge Bar Graph reaches 0% (no segments are lit), the UPS will continue to
operate until the actual voltage of the battery trips the battery protection circuit and shuts down the
UPS.
When the input AC voltage recovers, the UPS will turn on automatically.
6.2.4
Overload Condition
If the load exceeds the rating of the UPS or there is a short circuit on the UPS’s output, the
protection circuit of the UPS will shut down the UPS output (after a short delay, depending on the
depth of the overload).
This condition is indicated by the red Output Fail LED (10) and the red Overload Shutdown LED (14).
To recover from overload shutdown:
Turn off the Master ON/OFF switch (5).
Remove the overload (or short circuit) from the UPS output.
Turn on the Master ON/OFF switch (5).
The output may turn on immediately or after a short delay, depending on the duration the unit was
off. During this delay the yellow Output Standby LED (8) blinks.
6.2.5
Over Temperature Condition
When the internal temperature of the UPS exceeds a preset level, the yellow Over Temperature
Warning LED (15) blinks and audible alarm sounds at one second intervals, 50% duty cycle.
Three minutes after the Over Temperature Warning LED starts to blink (and if the temperature does
not drop), the UPS shuts itself off. This condition is indicated by the red Over Temperature
Shutdown LED (16) and the red Output Fail Led (10).
Recovery from Over Temperature Shutdown is automatic when the temperature drops.
Check condition of the Air Filter on the front panel. If it is dirty - clean it and re-install into the unit.
