Liebert 300 series Installation, Operaton & Maintenance Manual page 60

System shutdown due to
overload
Control error
Critical power supply failure
Load transferred due to internal
protection
External shutdown
Fan failure
System shutdown impending due
to over-temperature
System shutdown in 5 minutes
due to over-temp
UPS SYSTEM (Continued)
An overload condition has exceeded the capacity of the Static
Bypass Line. The UPS has been shut down, resulting in loss of
power to the critical load. Perform a UPS shutdown procedure.
Correct the overload condition and perform a UPS start-up
procedure.
Automatic diagnostic testing has detected a failure (of hardware
or software) in the UPS internal control system. A second
message may indicate internal test or software timeout. The
load has been automatically transferred to the Static Bypass
Line. Power to the load is not being conditioned by the UPS.
Contact Liebert Customer Service and Support.
A failure has been detected in one of the low voltage power
supplies. The load has been automatically transferred to the
Static Bypass Line. Power to the load is not being conditioned by
the UPS. Contact Liebert Customer Service and Support.
A failure has been detected in the UPS. More specik
information may be available in a separate Alarm Message. The
load has been automatically transferred to the Static Bypass
Line (provided the power available on the bypass line is within
specifications). Power to the load is not being conditioned by the
UPS. Contact Liebert Customer Service and
The UPS has been shut down from an external contact. Perform
a UPS start-up procedure when the conditions
external shutdown have been corrected.
COOLING
A failure has been detected in at least one of the internal cooling
fans. Contact Liebert Customer&rvice and SuDDort.
An over-temperature condition is present in the UPS cabinet.
The UPS will automatically shutdown if the over-temperature
continues. Determine the cause of the condition and correct it if
possible. Check for clogged air filter, restricted air flow, or fan
failure.
Over-temperature condition has persisted. Note the time stamp
on the alarm message. Perform an orderly shutdown of the
critical load. Perform a UPS shutdown procedure or allow the
UPS to perform an automatic shutdown. Contact
Customer Service and Support.
Meaning and
Corrective Action
I
the