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American Power Conversion 990-2233A User Manual

Page 17

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Smart-UPS RT 2400/3000 VA Tower/Rack-Mount UPS User Manual

17

Troubleshooting

Fault and Overload LEDs illuminated and UPS emits a sustained alarm tone (Refer to “Display Panel

Indicators” on page 8.)

The UPS has ceased sending power to

connected equipment.

The connected equipment exceeds the specified “maximum load” as defined

in Specifications on the APC Web site, www.apc.com.
Disconnect nonessential equipment from the UPS to eliminate the overload
condition.
Press the

button, then the

button to restore power to connected

equipment.

The Replace Battery/Battery Disconnected LED is illuminated (Refer to “Display Panel Indicators” on page 8.)

Battery is disconnected.

flashes and a short beep is emitted

every two seconds to indicate the

battery is disconnected.

Check that the battery connectors are fully engaged.

Weak battery.

Allow the battery to recharge for 24 hours and perform a self-test. If the

problem persists after recharging, replace the battery.

Failure of a battery self-test.

flashes and a short beep is emitted

for one minute. The UPS repeats the

alarm every five hours.

Allow the battery to recharge for 24 hours. Perform the self-test procedure to
confirm the replace battery condition. The alarm stops and the LED clears if

the battery passes the self-test.
If the battery fails again, it must be replaced. UPS output is maintained
during the self-test.

There is no utility power

There is no utility power and the UPS is

off.

Use the cold start feature to supply power to the connected equipment from

the UPS battery.
Press the

button for one second and release. The UPS will beep briefly.

Press and hold the

button again for about three seconds. The unit will

emit two beeps. Release the button during the second beep.

UPS operates On Battery although line voltage exists

Your system is experiencing very high,

low, or distorted line voltage.
The generator is not correctly sized.

Move the UPS to a different outlet on a different circuit: Inadequately sized

generators may distort the voltage. Test the input voltage with the utility
voltage display. Refer to “Utility Voltage Measurement” on page 9 for

additional information. Contact a qualified electrician to correct the building

wiring.

Diagnostic utility voltage (Refer to “Utility Voltage Measurement” on page 9.)

All five LEDs are illuminated.

The line voltage is extremely high and should be checked by an electrician.

Problem and/or Possible Cause

Solution