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20 User Guide APC BC300 Series 40kW 208/450/480V UPS
990-1403
Alarms and Events
Static switch 1
temp. warning
The temperature on the heat-sink
for the main static switch is higher
than the warning setting. The
unit’s status does not change.
However, if the temperature
continues to rise, the unit will
sound a “Static switch 1 temp.
shutdown” alarm.
Find the 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. If the fans are operating,
make sure the room temperature
is below 80°
F (27°
C). If not, cool
down the room. if the room was
already below this temperature,
call APC Global Service.
Static switch 2
temp. shutdown
The temperature on the heat-sink
for the bypass static switch is
higher than the shutdown level and
the bypass static switch has
opened. The unit switches to
battery operation until the
temperature falls below the
shutdown level; then, it transfers
back to normal operation. If the
temperature does not fall to this
level before the “Low DC
shutdown” alarm occurs, there will
be no output to the load equipment.
Find the 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.
If the fans are operating, make
sure the room temperature is
below 80° F (27° C). If not, cool
down the room. if the room was
already below this temperature,
call APC Global Service.
Static switch 2
temp. warning
The temperature on the heat-sink
for the bypass static switch is
higher than the warning setting.
The unit’s status does not change.
However, if the temperature
continues to rise, the unit will
sound a “Static switch 2 temp.
shutdown” alarm.
Find the 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.
If the fans are operating, make
sure the room temperature is
below 80° F (27° C). If not, cool
down the room. if the room was
already below this temperature,
call APC Global Service.
Synchronization
error (This
alarm occurs
during a power
outage)
The inverter output is not
synchronized to the utility (AC
input). The unit will transfer to
battery operation until the “Low
DC shutdown” alarm sounds. If the
unit can synchronize to utility
again before this event occurs, it
will transfer back to normal
operation.
If this alarm occurs during the
initial start-up, an electrician
must check the phase rotation.
If this alarm occurs while the unit
is connected to a generator, the
unit may be having problems
synchronizing to the generator.
Call APC Global Service.
If the alarm does not occur during
the initial start-up and the UPS is
not connected to a generator, call
APC Global Service.
Table 5: Possible Alarms