Best Power UNITY/I UT310 Manual Del Usuario página 18

Alarm Message
High temp. transformer
Inverter fuse blown
Inverter voltage error
Low DC shutdown
(This alarm is normal
when the UPS has run
on battery for a long
time.)
Low DC warning
(This alarm is normal
when the UPS has run
on battery for a while.)
What It Means
The temperature in the main transformer is
too high. If the problem is not corrected soon,
the unit will transfer to standby and will not
supply output voltage.
One or more of the fuses at the output of the
inverter are blown (F004, F005, F006). If
bypass is within tolerance (see the Glossary),
the unit transfers to static bypass operation. If
not, the unit transfers to standby and does not
supply output voltage.
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 (see the Glossary).
If bypass is not within tolerance, the unit
transfers to standby 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 standby and stops supplying
output voltage.
The UPS has been running on battery power
because of a power outage or problems in the
AC input. Battery voltage has dropped below
the shutdown setpoint, and the UPS has shut
down. If bypass is within tolerance (see the
Glossary), the unit will transfer to static
bypass operation. If not, the unit will transfer
to standby and will not supply output
voltage.
The UPS has been running on battery power
for a while because of a power outage or
problems in the AC input. Battery voltage has
fallen to the warning alarm setpoint. If the
UNITY/I is operating on battery, the unit's
status will not change, but battery voltage
will eventually drop to the shutdown setpoint.
At this point, the unit will shut down and
sound a "Low DC shutdown" alarm. If the
"Low DC warning" alarm happens during a
battery capacity test, the unit transfers back to
normal operation. If the unit has not been
running on battery power, call BEST.
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 BEST's
Worldwide Service.
Phone BEST's Worldwide Service.
If the UPS is in standby, 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 has
passed. Then, you can reset the EPO and
restart the unit by pressing the green
button inside the door. If the unit still will
not restart, call BEST's Worldwide
Service.
If the UPS is programmed for autostart, it
will automatically restart when the power
outage ends and AC input is again
available. If the UPS is not programmed
for autostart, you can restart the UPS
when the power outage ends by pressing
the green button inside the door.
If possible, restore AC input power to the
UPS. If you cannot do this, prepare for a
possible Low DC shutdown by shutting
down the loads (protected equipment)
connected to the UPS.
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What to Do