American Power Conversion 475I User Manual

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Placement / Power


Connect Equipment

3 Switch on the



Avoid placing the Back-UPSin:

to the Back-UPS









Direct sunlight

The rear panel of the Back-UPSconsists of theNote: Allow theBack-UPSto charge for a full eight



Excessive heat

following elements:

hours prior to use.





Press the push-buttononBack-UPSfront panel.



• Excessive humidity or in contact with fluids

Battery Back Up Outlets (qty. of 3). These







of any type

outlets provide battery back-up,surge protection,





and Electro-magneticInterference (EMI) filtering.











In case of power outage, battery power is






automatically provided to these outlets. Power





(utility or battery) is not supplied to these outlets




when the Back-UPSis switchedOff. Connect a





computer, monitor, and external disk or CD-ROM






drive to these outlets.





Surge Only Outlet. This outlet is alwaysOn




Plug the Back-UPSinto a wall outlet, as shown.



controlled by the On/Off switch. This outlet does






(when utility power is available) and is not


User’s Manual



not provide power during a power outage. Connect




a printer, fax machine or scanner to this outlet.













Observe that the following events occur after pressing







and releasing the push-button:






• The green On-Line indicator flashes.







• The yellow On Battery indicator lights while the







Self-Test is being performed.







• When Self-Test has successfully completed, only







the green On Line indicator will be lit.




Your computer’s power cord.



• If the internal battery is not connected, (see Step 1







above) the green On Line indicator and red



The Back-UPScharges the internal battery



Replace Battery indicator will light. The Back-




any time it is connected to a wall outlet.



UPS will also emit a chirping sound.

Status Indicators and Alarms


Replace the Internal Battery




There are four status indicators (lights) on the front panel of the Back-UPS(On Line, On Battery, Overload, and Replace Battery).





On Line (green) - is lit whenever utility power is powering the Battery Backup outlets.

On Battery (yellow) - is lit wheneverthe battery of theBack-UPSis powering equipment connected to the Battery Backup Outlets.

Four Beeps Every 30 Seconds - this alarm is sounded whenever the BackUPS is running On Battery. Consider saving work in progress.

Continuous Beeping - this alarm is sounded whenever a low battery condition is reached. Battery run-time is very low. Promptly save any work in progress and exit all open applications. Shutdown the operating system, computer and the Back-UPS.

Overload (red) - is lit whenever power demand has exceeded the capacity of theBack-UPS.

Continuous Tone - this alarm is sounded whenever the Battery Backup outlets are overloaded.

Circuit Breaker - the circuit breaker button located on the rear panel of the Back-UPS will stick out if an overload condition forces the Back-UPS to disconnect itself from utility power. If the button sticks out, disconnect nonessential equipment. Reset the circuit breaker by pushing the button inward.

Replace Battery (red) - is lit whenever the battery is near the end of its useful life, or if the battery is not connected (see above). A battery that is near the end of its useful life has insufficient runtime and should be replaced.

Chirps for 1 Minute Every 5 Hours- this alarm is sounded whenever the battery has failed the automatic

diagnostic test.

To replace the internal battery, proceed as follows:

Note: Replacing the battery is a safe procedure. However, small sparks may occur during the process. This is normal.



Place the unit on its side. Slide the battery

Pull the battery out, exposing the battery terminals

compartment cover upward and off of the UPS.

and wires. Disconnect the wires from the terminals.








Slide the new battery into the battery compartment.

Align the battery compartment cover with the grooves

Connect the battery wires to the terminals as follows:

in the UPS. Slide the cover down until it locks.

Black wire to Ground (-)terminal


Red wire to Positive (+) terminal


Transfer Voltage Adjustment (optional)

In situations where the Back-UPSor connected equipment appears too sensitive to input voltage, it may be necessary to adjust the transfer voltage. This is a simple task requiring use of the front panel pushbutton. To adjust the transfer voltage, proceed as follows:

1.Plug the Back-UPSinto the utility power source. TheBack-UPSwill be in a Standby Mode (no indicators lit).

2.Press the front panel pushbutton fully inward for 10 seconds. All indicators on the Back-UPSwill flash to acknowledge going into Programming Mode.

3.The Back-UPSwill then indicate its current Lower Transfer Voltage, as shown in the following table.

Indicators Lit

Lower Transfer Voltage

Use When


160 VAC

Back-UPSfrequently goes On Battery due to



low input voltage.


180 VAC (factory default)

Normal power conditions exist.


196 VAC

Connected equipment is sensitive to low voltage.




4.To select 160 volts as the Lower Transfer Voltage, press the pushbutton until 1 indicator is flashing.

5.To select 180 volts as the Lower Transfer Voltage, press the pushbutton until 2 indicators are flashing.

6.To select 196 volts as the Lower Transfer Voltage, press the pushbutton until 3 indicators are flashing.

7.Once in Programming Mode, if the pushbutton is not pressed within 5 seconds, the Back-UPSwill exit the Programming Mode, and all indicators will extinguish.

Order Replacement Battery

The typical battery lifetime is 3-6years (depending on the number of discharge cycles and operating temperature). A replacement battery can be ordered over the phone from APC, or the battery can be orderedon-linefrom the APC web site (see below, a valid credit card is required).

When ordering, please specify Battery Cartridge RBC2.


Before storing, charge the Back-UPSfor at least eight hours. Store theBack-UPScovered and upright in a cool, dry location. During storage, recharge the battery in accordance with the following table:

Storage Temperature

Recharge Frequency

Charging Duration

-5o to 30oC (23o to 86oF)

Every 6 months

8 hours

30o to 45oC (86o to 113oF)

Every 3 months

8 hours

Please contact APC Technical Support to troubleshoot the unit before returning it to APC.

APC and Back-UPSare registered trademarks of American Power Conversion All other trademarks are property of their respective owners.


Use the tables below to solve minor Back-UPSinstallation and operation problems. Consult APCOn-lineTechnical Support or call APC Technical Support for assistance with problems that cannot be resolved using this document:

Possible Cause




Back-UPSwill not switch on

Back-UPSnot connected to an AC

Check that the Back-UPSpower plug is

power source.

securely connected to the wall outlet.

Back-UPScircuit breaker “tripped”.

Disconnect non-essentialequipment from the



Back-UPS.Reset the circuit breaker (located



on the rear panel of the Back-UPS)by



pushing the circuit breaker button fully



inward until it catches. If the circuit breaker



resets, switch the Back-UPSon and reconnect



the equipment one-at-a-time.If the circuit



breaker trips again, it is likely that one of the



connected devices is causing the overload.


Very low or no utility voltage.

Check the wall outlet that supplies power to



the Back-UPSusing a table lamp. If the lamp



bulb is very dim, have the utility voltage



checked by a qualified electrician.





Back-UPSdoes not power computer/monitor/external drive during an outage

Internal battery is not connected.

Check the battery connections. (See “Connect the Battery” under


“Installation” on the front page of this document.

Computer, monitor or external disk/

Move computer, monitor, or external drive power cord plug to the

CD-ROMdrive is plugged into a

Battery Backup outlets.

Surge Only outlet.




Back-UPSoperates on battery although normal utility voltage exists

Back-UPScircuit breaker “tripped”.

Disconnect non-essentialequipment from the










Back-UPS.Reset the circuit breaker (located






on the rear panel of the Back-UPS)by






pushing the circuit breaker button fully










The wall outlet that the Back-UPSis

inward until it catches.














Connect the Back-UPSto another wall outlet or have a qualified

connected to does not supply utility

electrician check the building wiring.

power to the unit.












Back-UPSdoes not provide expected backup time

Back-UPSis excessively loaded.

Unplug non-essentialBattery Backup connected equipment, such as


printers and plug them into Surge Only outlets.


Note: Devices that have motors or dimmer switches (laser printers,


heaters, fans, lamps, and vacuum cleaners, for example) should not be


connected to the Battery Backup outlets.

Back-UPSbattery is weak due to

Charge the battery. The battery charges whenever the Back-UPSis

recent outage and has not had time

connected to a wall outlet. Typically, eight hours of charging time are

to recharge.

needed to fully charge the battery from total discharge. Back-UPS


run-timeis reduced until the battery is fully charged.

Battery requires replacement.

Replace battery (see Order Replacement Battery). Batteries typically


last 3-6years, shorter if subjected to frequent power outages or


elevated temperatures.



A red indicator is lit

Battery is not connected properly.

Check the battery connections. Consult "Connect the Battery" under


"Installation" on the front page of this document. It shows how to


access the battery and connect the wires.

The Overload indicator is lit if

Move one or more equipment power plugs to the Surge Only outlets.

equipment connected to the Battery


Backup outlets is drawing more


power than the Back-UPScan




Battery requires replacement.

The battery should be replaced within two weeks (see "Order


Replacement Battery"). Failure to replace the battery will result in


reduced run-timeduring a power outage.



Red indicators are flashing


Call APC for service.



Replace Battery indicator lit and an alarm sounds when the Back-UPSis turned on

Internal battery not connected.

Check the battery connections.




Input Voltage (on line)

180 - 264 Vac (default setting)

Frequency Limits (on line)

47 - 63 Hz (autosensing)

On Battery Waveshape

Stepped Sine Wave

Maximum Load

325 VA - 195 W

475 VA - 285 W

Typical Recharge Time

8 Hours

Operating Temperature

0o to 40oC (32o to 104oF)

Storage Temperature

-5o to 45oC (23o to 113oF)

Operating and Storage

0 to 95% non-condensing

Relative Humidity



Size (H x W x D)

16.5 x 9.2 x 28.5 cm

(6.5 x 3.6 x 11.2 inches)


325 VA - 5.72 kg (12.6 lb)

475 VA - 5.72 kg (12.6 lb)

Shipping Weight

325 VA - 6.72 kg (14.8 lb)

475 VA - 6.72 kg (14.8 lb)

EMI Classification

EN 55022, IEC 801-2and801-4(level IV), and IEC801-3(level III)

On Battery Run-Time

325 VA - 14 Minutes typical - desktop computer and 38.1 cm (15 inch) monitor.


475 VA - 18 Minutes typical - desktop computer and 38.1 cm (15 inch) monitor.





Note: If the UPS requires service, do not return it to the dealer. The following steps should be taken:

1.Consult the Troubleshooting section to eliminate common problems.

2.Determine if the circuit breaker is tripped. If the circuit breaker is tripped, reset the breaker and determine if the problem still exists.

3.If the problem persists, consult the APC Worldwide Web site ( or call customer service.

Record the model number of the UPS, the serial number, and the date purchased. Be prepared to troubleshoot the problem over the telephone with a technician. If this is not successful, the technician will issue a Return Merchandise Authorization Number (RMA#) and a shipping address.

If the UPS is under warranty, repairs are free. If not, there is a repair charge.

4.Pack the UPS in its original packaging. If the original packing is not available, ask customer service about obtaining a new set. Pack the UPS properly to avoid damage in transit.

Note: Never use StyrofoamTM beads for packaging. Damage sustained in transit is not covered under warranty (insuring the package for full value is recommended).

5.Write the RMA# on the outside of the package.

6.Return the UPS by insured, prepaid carrier to the address provided by customer service.


The standard warranty is two (2) years from the date of purchase. APC’s standard procedure is to replace the original unit with a factory reconditioned unit. Customers who must have the original unit back due to assigned asset tags and set depreciation schedules must declare such a need at first contact with an APC Technical Support representative. APC will ship the replacement unit once the defective unit has been received by the repair department, or cross ship upon the receipt of a valid credit card number. The customer pays for shipping the unit to APC. APC pays ground freight transportation costs to ship the replacement to the customer.

APC Contact Information











APC Asia Pacific






APC Europe






APC Latin America










APC North America
















Technical Support








Copyright © 2001 American Power Conversion. All rights reserved.