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16 User Guide APC BC300 Series 40kW 208/450/480V UPS
990-1403
Alarms and Events
High output
voltage (This
alarm is usually
only listed in the
events log)
The output voltage is higher than
the alarm setting. The unit stays in
the normal operation mode. If the
alarm is not cleared, the unit will
transfer to static bypass operation
if bypass is within tolerance. If
bypass is not within tolerance, the
unit will transfer to stand-by and
will not supply output voltage.
If the alarm is still active, put the
UPS into bypass by displaying
the user parameters and
changing “Bypass Operation” to
“ON.” (See the “Parameter
Settings” section in this User
Guide). Then, call APC Global
Service.
High temp.
choke
The temperature in the main choke
is too high. If the problem is not
corrected soon, the unit will
transfer to battery operation.
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 temp.
transformer
The temperature in the main
transformer is too high. If the
problem is not corrected soon, the
unit will transfer to stand-by and
will not
supply output voltage.
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.
Inverter fuse
blown
One or more of the fuses at the
output of the inverter are blown
(F004, F005, F006). If bypass is
within tolerance, the unit transfers
to static bypass operation. If not,
the unit transfers to stand-by and
does not supply output voltage.
Call APC Global Service.
Inverter voltage
error
The output voltage is too high or too
low. If the alarm was caused by
high output voltage, the unit
transfers to static bypass operation
if bypass is within tolerance. If
bypass is not within tolerance, the
unit transfers to stand-by and does
not supply output voltage. If the
alarm was caused by low output
voltage, the unit transfers to static
bypass operation if bypass is within
tolerance. If bypass is not within
tolerance, the unit transfers to
battery for five seconds and then
transfers to stand-by and stops
supplying output voltage.
If the UPS is in stand-by, restart
the UPS by pressing the green
button inside the door. If the UPS
will not restart, a user may have
started an emergency power off
(EPO) shutdown. Find out if the
EPO shut down the UPS; if it did,
find out why and make sure the
emergency situation has passed.
Then, reset the EPO and restart
the unit by pressing the green
button inside the door. If the unit
will still not restart, call APC
Global Service.
Table 5: Possible Alarms