Liebert UPSTATION GXT 2U - Manual (Page 31)

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Alarm Conditions
Condition Alarm
Battery Mode
(utility failure) One short beep every 10 seconds; more than
2 minutes of run time remaining
Low Battery Two short beeps every 5 seconds; less than
2 minutes of run time remaining
Output overload
(bypass) One short beep every half second
Overtemperature
(bypass) A one-second beep every 4 seconds
DC Bus Overvoltage
(bypass) A one-second beep every 4 seconds
Control power supply
failure (bypass) A one-second beep every 4 seconds
PFC failure (bypass) A one-second beep every 4 seconds
Inverter failure A one-second beep every 4 seconds
Battery Test failure A 2-second beep every minute