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Alarms and Events
990-1403
User Guide APC BC300 Series 40kW 208/450/480V UPS 15
Charge reg.
error (reg. =
regulator)
Failure in charge regulation. The
unit transfers to battery until the
“Low DC shutdown” alarm occurs;
then, it transfers to stand-by and
does not supply output voltage.
Call APC Global Service.
External service
switch activated
The external service bypass switch
is in the line position. The unit is in
stand-by and does not supply
output voltage. However, the loads
may be receiving power from the
external manual bypass.
Call APC Global Service.
Fan fault If the fan monitoring option is
installed, this alarm sounds if one
or more of the fans are slowing
down. The unit’s status does not
change, but the problem may cause
other high-temperature alarms
that could change the unit’s status.
Call APC Global Service.
Fatal Error
RAM1 data
error
Components on the main controller
board have failed.
Call APC Global Service.
Fault in int.
power supply
There is a fault in the internal
power supply unit (PSU). The UPS
transfers to stand-by and does not
supply output voltage.
Call APC Global Service.
High Battery
Temperature
The ambient battery temperature
is higher than the set alarm level.
The unit’s status does not change,
but battery life could be affected.
This alarm is often caused by high
room temperature.
Make sure the room temperature
does not exceed 80° F (27° C). If
so, cool down the room. If the
temperature was below 80° F (27°
C) at the time of the alarm, find
the exhaust vents for the UPS
fans and check to see if the fans
are operating. Do not try to open
the unit, and do not insert
anything into a fan vent. If the
fans are not operating, call APC
Global Service.
High DC
Warning
The monitored battery voltage is
higher than the unit’s shutdown
setting.
Call APC Global Service.
High DC
Shutdown
The monitored battery voltage is
higher than the unit’s shutdown
setting. The unit will switch to
battery power to reduce DC bus
voltage.
Call APC Global Service.
Table 5: Possible Alarms