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6: TROUBLESHOOTING
Use the chart below to solve minor UPS installation and operation problems. Refer to APC for assis-
tance with complex UPS problems.
PROBLEM AND/OR POSSIBLE
C
AUSE
S
OLUTION
UPS WILL NOT TURN ON
UPS not connected to utility
power supply.
Check that the power cord from the UPS to the utility power supply is se-
curely connected at both ends.
Battery not connected prop-
erly.
Check that the battery connector is fully snapped into position.
Very low or no utility voltage. Check the utility power supply to the UPS by plugging in a table lamp. If the
light is very dim, have the utility voltage checked.
UPS WILL NOT TURN OFF
The front display is not lit, yet
the outlets are powered.
The black switch is stuck in
the off (right) position. In this
position, the switch disables
operation of the power module
and power to the loads is by-
passed around the power
module.
Gently attempt to reposition the black switch to the left, and the module will
be activated.
UPS BEEPS OCCASIONALLY
Normal operating UPS beeps
when running on battery.
None. The UPS is protecting the connected equipment from occasional util-
ity power irregularities.
UPS IS NOT PROVIDING EXPECTED BACKUP TIME
The UPS battery is weak due
to a recent outage or is near
the end of the service life.
Charge the battery. Batteries require recharging after extended outages, and
wear faster when frequently put into service or when operated at elevated
temperatures. If the battery is near the end of the service life, consider re-
placing the battery even if the replace battery LED is not yet illuminated.
THE OUTPUT VOLTAGE IS NOT MEETING EXPECTATIONS
The output voltage on battery
is too low or too high.
Check that the voltage selection rotary switch is set to the desired level (See
Installation). Note: In order to register any modification in voltage selec-
tion, the UPS must be turned off and then on again.
The output voltage online is
too high or too low.
The UPS allows a certain range of output voltage to be filtered from the
input before it goes to battery. If this range is too wide for the load equip-
ment, the upper and lower limits can be customized (through software) to
your application.