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Operation
77
Inv I limit xfer
Inverter
Current Limit
Transfer
Fault NO YES NO YES
The instantaneous inverter current of any
one phase has exceeded its Pulse by Pulse
current limit value. An “Inverter Current
Limit” alarm was already issued and pulse
parallel operation was initiated. At the end
of pulse parallel the load current has not be
reduced below 150% The load will transfer
to Static Bypass. If the fault or over load
clears the unit will retransfer to UPS. Check
the total load compared to the UPS rating,
reduce load where necessary. If the UPS
does not retransfer when the load is below
100% of the rated load or if the unit shuts
down, contact Liebert Global Services
Immediately.
Batt ovtemp
cb trip
Battery
Overtemp CB
Trip
Fault YES YES NO YES
With the battery breaker closed and the
Battery Overtemp…Breaker Trip” option
enabled, the internal battery temperature
has exceeded its Maximum set point value.
The battery UV trip will be activate and the
battery will be disconnected from the UPS.
Battery Back up is no longer available.
Check the battery to determine the possible
cause of the overload and remove if
possible. Once the battery has cooled
below the set point temperature, the battery
may be brought on line again. If the
problem recurs contact Liebert Global
Services.
Batt gnd CB
trip
Batt gnd fault
CB trip
Fault NO YES NO YES
With BGF option installed, BGF breaker trip
enabled, and batt breaker closed, Comms
DPS sees its BGF input asserted by the
SWGR. It will issue a batt breaker UV trip
and motor op disable. To correct, repair and
restart batt via the MM. Contact Liebert
Global Services for assistance.
Byp pwr
supply fail
Bypass Power
Supply Fail
Fault NO YES NO YES
With Bypass source available, the UPS has
determined that the bypass power supply
has failed. The SBS will be turned off and
the contactors opened. SBS will not be
available. This fault will inhibit transfers and
start-up. Contact Liebert Global Services
immediately.
EPO
shutdown
EPO
Shutdown
Fault NO YES NO YES
The Emergency Power Off switch has been
pressed, which caused the UPS system to
shut down and remove all power from the
critical load. Determine the cause of the
emergency condition and correct it if
possible. Contact Liebert Global Services if
you require assistance.
Table 7 Alarms, functions, and corrective actions (continued)
Actual
Alarm/fault
Name
Displayed
On Front
Panel
Description
of Alarm/
Fault
Fault
Or
Alarm
Latch
Mask
Dial
Mask
Freeze
Mask
Event Log
Mask Meaning and Corrective Action(s)