S3K Series Instruction Manual • 10
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5.6 Battery charge Bar Graph
The 5-LED display shows the present charge of the UPS’s batteries as a
percentage of the batteries’ capacity. When all five LEDs are illuminated, the
batteries are fully charged. When only two LEDs are illuminated, the batteries
can supply less than 2 minutes of run time for the load.
5.7 cold Start
When the UPS is off and there is no utility power, you can use the cold start
feature to apply power to the loads from the UPS’s batteries. Press the ON/TEST
button until the UPS beeps.
5.8 Shutdown Mode
In shutdown mode, the UPS stops supplying power to the load and waits for
the return of utility power. If there is no utility power present, external devices
(e.g. servers) connected to the computer interface can command the UPS to
shutdown. This is normally done to preserve battery capacity after the graceful
shutdown of protected servers. The UPS will scroll the front panel indicators
sequentially in shutdown mode.
6.0 Alarms
6.1 Backup (slow beeping)
When the UPS is operating in backup mode, the UPS will sound an audible alarm
with a beep every four seconds. The alarm stops when the UPS returns to the
line-interactive mode. The alarm may be silence by pressing the ON/TEST button
while in backup mode. Press the ON/TEST button again to reactivate the sound.
6.2 Low Battery (rapid beeping)
In backup mode when the energy of batteries reaches lower levels (about
20%–30%), the UPS beeps rapidly until it shuts down from battery exhaustion or
returns to line-interactive mode. The low battery alarm cannot be silenced.
6.3 overload (continuous beeping)
When the UPS output exceeds 100% of nominal for 20 seconds or 125% for 2
seconds, an audible alarm will sound and the front panel OVERLOAD LED will
illuminate. The UPS will shut down automatically to protect its internal circuitry.
