Vertiv|Liebert® S600 10kVA ~ 20kVA UPS | User Manual 51
4.6 UPS Alarm Message List
Table 4-5 gives all UPS alarm messages based on the 'Current' and 'History' menus.
Table 4-5 Alarams and meaning
Internal commuication is abnormal, please check the communication cables are
connected correctly or not
The rectifier is faulty and off
The discharger is faulty, because the bus voltage exceeds the setting range
when discharger starts or soft starts
The inverter is off when DC bus voltage is faulty. The load will transfer to bypass if
the bypass is available
The charger output voltage is abnormal, and the charger is off
The auxiliary power output voltage exceeds the normal range
Input backfeed
Battery mode.
The mains relay short circuit, and the difference between mains
and battery voltage is less than the setting range
The inverter is off when the inverter output voltage and current exceed the
setting range. If bypass is available, the UPS will transfer to bypass mode,
otherwise the system will power off
Check that the output cables are not shorted
Bypass backfeed
battery mode.
The bypass relay is shorted or the SCR is damaged
Output off,
voltage is not
zero
When there is no output, the system detects that the output has a voltage
The inveter relay is shorted
The parallel online number is different from the setting number. Please check
that the parallel number at 'Settings' page is the same as the actual online
number, and that the parallel cables are normal
The local UPS and its online frequency configuration is different or the parallel
address is conflicted. Please check that the parallel system paramerte setting is the
same as the local parameter setting
Parallel cable
Connection
abnormal
Detect the parallel cables are loosened
The AC input mains N line is not detected. Please check that the input N line is
opened or loosened
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