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5. RS-232 TERMINAL COMMUNICATION
5.12 Event Descriptions (Alarms),
continued
Several alarms can be triggered during the same event. If there is a loss
of AC line voltage, for example, the UPS may detect a glitch, low frequency
and blackout.
Low Battery Warning (LO_BAT_WARN) - The batteries are near the
end of their useful charge. If AC line power is not restored within a short
period of time, output power will be lost. All systems should be shutdown
immediately to prevent loss of data.
Low Battery Shutdown (LO_BAT_SHTDWN) - To prevent an over-
discharge condition of the batteries, the unit has shutdown. Output power is
terminated in this condition.
Battery Voltage High (BAT_VOLT_HI) - The charging voltage is higher
than the threshold setting for the batteries. This could be the result of a
defective charger, improper external battery connections, or defective
batteries. Service the unit or batteries to correct condition. Note: This
condition activates the SERVICE alarm, along with an audible alarm which
can be cleared by pressing the ALARM OFF or MUTE key.
Failed Self-Test (FAIL_SELF_TEST) - The unit could not maintain
output power while in the self-test mode. Check the batteries and circuit
breakers. Note: This condition activates the SERVICE alarm, along with an
audible alarm which can be cleared by pressing the ALARM OFF or MUTE
key.
Battery Fault (BATT_FLT) - The battery charger is not able to supply
the proper amount of current or voltage to the batteries. This condition usually
indicates that the batteries are not connected or the BATTERY circuit breaker
is switched OFF.
Glitch (GLITCH) - A glitch is a fast, low amplitude line disturbance where
the input voltage drops momentarily (less than 8 ms). * *
Spike (SPIKE) - A spike is a fast, high amplitude line disturbance where
the input voltage rises momentarily (less than 8 ms). * *
Sag (SAG) - A sag is a slow, low amplitude line disturbance where the
input voltage decreases for 8 - 40 ms. * *
Surge (SURGE) - A surge is a slow, high amplitude line disturbance
where the input voltage increases for 8 - 40 ms. * *
Brownout (BROWNOUT) - A brownout is a slow, low amplitude line
disturbance where the input voltage decreases for a long period of time
(greater than 16 ms). * *
Slow Surge (SLOW_SURGE) - A brownout high (high overvoltage) is a
slow, high amplitude line disturbance where the input voltage increases for a
long period of time (greater than 16 ms). * *
* * Indicates events that cause the UPS to operate in “LINE FAILURE” mode.
Summary of Contents for CFR 1000
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