Vertiv Liebert EXS - Page 73

Alarm/Warning Description Action
Bypass Not
Available
Bypass output disabled under generator mode.
This alarm resets automatically once the condition is no
longer true.
Bypass Overcurrent The bypass current is outside the rated current of 1.1 times.
Check output loading or contact Vertiv Technical
Support.
Bypass Overcurrent
Timeout
Bypass overload delay timeout, and the bypass shuts down.
Check output loading or contact Vertiv Technical
Support.
Bypass phase
reversed
The AC bypass input phase rotation is reversed in a single module
system system.
Call a qualified electrician to verify the input phase
rotation or contact Vertiv Technical Support.
Bypass STS fail
At least one of the bypass SCRs has failed and the output is off and
load will no longer have power.
Contact Vertiv Technical Support.
Bypass Unable to
Trace
The bypass voltage and/or frequency is outside specifications.
This alarm resets automatically once the condition is no
longer true.
Charger Fault Battery charger failure occurred. Contact Vertiv Technical Support.
Charger
Overtemperature
The power tube of charger inside the module has overtemperature Contact Vertiv Technical Support.
Charger Shutdown
Dry contact signal. When the dry contact gives a command of charger
shutdown, then the charger will shutdown
None required
Control Power Fail The auxiliary power failure or power-off Contact Vertiv Technical Support.
DC Bus Abnormal
The DC bus voltage is outside of limits and the load will transfer to
bypass power if available.
Contact Vertiv Technical Support.
DC Bus Overvoltage
The DC bus voltage is outside of limits and the load will transfer to
bypass power if available.
Contact Vertiv Technical Support.
Discharge Current
Limit
Discharge current is over limit. Contact Vertiv Technical Support.
Discharge Fault DC bus voltage too high or too low during discharge. Contact Vertiv Technical Support.
Discrete Bus
Comms. Abnormal
Communication failure between discrete bus inside the rack. It is
recommended to confirm that the rear communication cables
connection inside the rack is reliable.
Contact Vertiv Technical Support.
ECO Mode Active ECO mode activated. None required
ECO Mode Enabled ECO mode enabled. None required
EPO UPS has shutdown due to activation of the REPO circuit.
Check REPO circuit to reset it and manually restart the
UPS.
Equalize Charge
Timeout
The actual float charging time exceeds the time set by the setting
software.
Excess Auto
Retransfers
The UPS remains on bypass power due to exceeding the preset
number of overload transfers to bypass within a 1 hour period. The
connected equipment is not protected.
Check output loading or contact Vertiv Technical
Support.
Excess ECO Auto
Transfers
The UPS remains on inverter power due to exceeding the preset
number of transfers within a 1 hour period while in ECO mode
operation.
Check input power or contact Vertiv Technical Support.
External MBB
The external maintenance bypass switch is closed. The UPS is being serviced, the load is not protected.
Table 9.2 UPS Alarm and Warning Messages (continued)
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Vertiv™ Liebert® EXS Installer/User Guide