Troubleshooting – APC Back-UPS BN450M User Manual
Page 6
Back-UPS BE425M/425M-LM, BN450M/450M-CA
6
Troubleshooting
Problem and Possible Cause
Solution
The Back-UPS will not turn on
The Back-UPS is not connected to AC power,
there is no AC power available at the wall outlet,
or the AC power is experiencing a brownout or
over voltage condition.
Make sure the power cord is securely connected to
the wall outlet, and that there is AC power available
from the wall outlet.Where applicable, check that
the wall outlet is switched on.
The Back-UPS is on, the POWER button alternated green-red and the unit emits a constant tone
• The battery is disconnected.
• The battery is near the end of useful life and
should be replaced.
• Remove AC power and refer to the section
“Connect the Battery” on page 2
.
• Refer to the section
for details.
Connected equipment loses power
A Back-UPS overload condition has occurred.
Remove all nonessential equipment connected to
the outlets. One at a time reconnect equipment to
the Back-UPS.
Charge the battery for 24 hours to make sure it is
fully charged. If the overload condition still occurs,
replace the battery.
The Back-UPS battery is completely discharged. Connect the Back-UPS to AC power and allow the
battery to recharge for eight hours.
Connected equipment does not accept the step-
approximated sine waveform from the Back-
UPS.
The output waveform is intended for computers and
peripheral devices. It is not intended for use with
motor driven equipment.
The Back-UPS may require service.
Contact SEIT Technical Support for more solutions.
The POWER button is green and flashes twice every 2 seconds.
The Back-UPS is operating on battery power.
The Back-UPS is operating normally on battery
power. At this point the user should save all open
files, and shutdown the computer. When AC power
is restored the battery will recharge.
The POWER button flashes green in rapid succession.
The Back-UPS battery has approximately two
minutes of remaining runtime.
The battery is near a total discharge state. The user
should save all open files, and shutdown the
computer. When AC power is restored the battery
will recharge.
The Building Wiring Fault LED is red
The building wiring presents a shock hazard that
must be corrected by a qualified electrical.
Do not operate the Back-UPS. Call a qualified
electrician to correct the building wiring fault.
The Back-UPS has an inadequate battery runtime
• The battery is not fully charged.
• The battery is near the end of useful life and
should be replaced.
Leave the Back-UPS connected to AC power for
eight hours while the battery charges to full
capacity.
As a battery ages, the runtime capability decreases.
to order replacement batteries.
The alarm is on with a constant tone; outlets are normal but
POWER
button is not bright.
The UPS os on AC power but the power of the
connected equipment exceeds the rated power of
the UPS. If a power disruption is to occur at any
moment the UPS may not be able to power the
connected equipment. Power to the outlets will be
uninterrupted as long as AC power is present.
Disconnect devices from the UPS until the load is
less than the rated output of the UPS.
The alarm is on with a constant tone and the UPS is off.
• The UPS was on battery and the connected load
exceeded the rated load of the UPS.
Turn off the UPS. Disconnect all devices. Turn on
the UPS and reconnect the devices one at a time.