American Power Conversion 420-620 User Manual

104 Kb

APC Smart-UPS420/620

User’s Manual

990-7041Revision 1 9/97

Installation and Initial Start-Up

To obtain warranty coverage, please fill out and return the warranty registration card now.


Inspect the UPS upon receipt. Notify the carrier and dealer if there is damage. The packaging is recyclable; save it for reuse or dispose of it properly.


Install the UPS in a protected area that is free of excessive dust and has adequate air flow. Do not operate the UPS where the temperature and humidity is outside the specified limits.

Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the warranty.

Connect to Utility

Check the Site Wiring Fault Indicator

Caution: If the site wiring fault indicator lights, get a qualified electrician to correct the building wiring.

Connect the Loads

Plug the loads into the output connectors on the rear of the UPS. To use the UPS as a master on/off switch, make sure that all of the loads are switched on.

Caution: Do not connect a laser printer to the UPS.

Connect Telephone/Network Surge

Suppression (Optional)

Connect a single line telephone or a 10Base-T/100Base-Txnetwork cable into theRJ-45/RJ-11telephone/network surge protection IN jack on the back of the UPS. Connect from the OUT jack with telephone cable (supplied) or network cabling (not supplied) to a fax modem or network port.

Connect Computer Interface

Port (Optional)

PowerChute®plus power management software is included with this UPS. Connect the supplied interface cable to the9-pincomputer interface port on the back panel of the UPS. Connect to the computer. See software documentation for installation instructions.

Charge the battery

The UPS charges its battery whenever it is connected to utility power. The battery will

charge fully during the first 4 hours of normal operation. Do not expect full runtime during this initial charge period.

Operating Instructions

Switch On — Switch Off

With the UPS plugged in, press and release the on/off/test button to supply power to the loads.

The loads are immediately powered while the UPS performs a self-test.Press and release the button again to turn off power to the loads. It may be convenient to use the UPS as a master on/off switch for the protected equipment.

The on-lineLED illuminates when the UPS is supplying utility power to the loads.


The UPS performs a self-testautomatically when turned on, and every two weeks thereafter (by default). Automaticself-testeases maintenance requirements by eliminating the need for periodic manualself-tests.

During the self-test,the UPS briefly operates the loadson-battery.If the UPS passes theself-test,it returns toon-lineoperation.

If the UPS fails the self-testit immediately returns toon-lineoperation and lights the replace battery LED.

The loads are not affected by a failed test. Recharge the battery overnight and perform the self-testagain. If the replace battery LED is still on, replace the battery using theReplacing the Battery procedure.

On Battery

During on-batteryoperation, the on-

battery LED illuminates and the UPS sounds an audible alarm consisting of 4

beeps every 30 seconds. The alarm stops when the UPS returns to on-lineoperation.

Low Battery

When the UPS is operating on-batteryand the energy reserve of the battery runs low, the UPS beeps continuously until the UPS shuts down from battery exhaustion or returns toon-lineoperation.


When loads exceed the UPS’s capacity,

the overload LED illuminates and the UPS emits a sustained tone. The alarm

remains on until the overload is removed. Disconnect nonessential load equipment from the UPS to eliminate the overload.

If the overload is severe, the input circuit breaker may trip (the resettable center plunger of the circuit breaker pops out). Disconnect nonessential load equipment from the UPS to eliminate the overload and press the plunger back in.

If there is AC power and the circuit breaker does not trip during overload, the loads are still powered. If the circuit breaker trips or the UPS attempts to transfer to battery, the loads’ power will be shut off. Turn the UPS off then back on to power the loads.

Replace Battery

If the battery fails a self-test,the UPS emits short beeps for one minute and the replace battery LED illuminates.

The UPS repeats the alarm every five hours. Perform the self-testprocedure to confirm replace battery conditions. The alarm stops when the battery passes theself-test.

Shutdown Mode

If there is no power, the host connected to the computer interface port can command the UPS to shut down. This is normally done to preserve battery capacity after a controlled shutdown of the protected system. In shutdown mode the UPS stops supplying power to the load. The online and overload LED indicators flash alternately or, if the UPS has shutdown due to a low battery, the UPS will beep once every 4 seconds for approximately 16 seconds. When line power is restored, the UPS will return to online operation.

Cold Start

Note: Cold start is not a normal operating condition.

When the UPS is off and there is no utility power, it is possible to cold start the UPS to power the loads from the UPS’s battery.

Press and hold the on/off/test button until the UPS begins beeping.

Release the on/off/test buttonduring the beeping to start the UPS.


Storage Conditions

Store the UPS covered and upright in a cool, dry location, with its battery fully charged. Before storing, charge the UPS for at least 4 hours. Disconnect any cables connected to the computer interface port to avoid unnecessarily draining the battery.

Extended storage

At -15to +30°C (+5 to +86°F), charge the UPS’s battery every 6 months

At +30 to +45 °C (+86 to +113°F), charge the UPS’s battery every 3 months.

Replacing the Battery

This UPS has an easy to replace hot-swappablebattery.

Note: Please read the cautions in the APC Safety Guide.

Replacement Batteries

See your dealer or call the number in this manual for information on replacement battery kits. For 420 models, order RBC 2. For 620 models, order RBC 4.

Battery Replacement Procedure

Battery replacement is a safe procedure, isolated from electrical hazards. You may leave the UPS and loads on for the following procedure.

Note: Once the battery is disconnected, the loads are not protected from power outages.

1.Lay the UPS on its left side. Remove the two screws holding on the battery door and open the door.

Note: It may be necessary to pull the battery door slightly toward the front of the unit in order to open the door fully.

2. Gently pull out the battery by grasping the white tab.



UPS will not turn on.

UPS will not turn on or off.

UPS operates on-batteryeven though normal line voltage is thought to exist.

UPS beeps occasionally.

UPS does not provide expected back up time.

On-lineand overload indicators are flashing alternately.

All indicators are flashing.

The UPS operates normally, but the site wiring fault indicator is lit.

On-lineandon-batteryindicators only are flashing

All indicators are off and the UPS is not operating.

The replace battery light is illuminated.

The overload light is illuminated or flashing

Possible Cause

On/off/test button not pushed.

UPS input circuit breaker tripped.

Computer interface problem.

UPS’s input circuit breaker tripped.

Normal UPS operation.

The UPS’s battery is weak due to recent outage or is near the end of its service life.

The UPS was shutdown by PowerChute®plus software.

Internal UPS fault.

Building wiring error such as missing ground or hot to neutral wire reversal.

Internal UPS fault.

The UPS is shutdown and the battery is discharged from an extended power outage.

Weak batteries.

Replacement batteries not connected properly.

The UPS is overloaded.


Press the on/off/test button to power the UPS and the loads.

Reduce the load on the UPS by unplugging equipment and reset the circuit breaker by pressing the plunger back in.

Disconnect the computer interface. If the UPS now works normally, check the interface cable and the attached computer.

Reduce the load on the UPS by unplugging equipment and reset the circuit breaker by pushing the plunger back in.

None. The UPS is protecting the load.

Charge the battery. The UPS’s batteries require recharging after an extended outage. Batteries age faster when put into service often and when operated at elevated temperatures. If the battery is near the end of its service life, consider replacing the battery even if the replace battery indicator is not yet lit.

None. The UPS will restart automatically when utility power returns.

Do not attempt to use the UPS. Turn the UPS off and have it serviced immediately.

Have a qualified electrician correct the building wiring.

Do not attempt to use the UPS. Turn the UPS off and have it serviced immediately.

None. The UPS will return to normal operation when the power is restored and the battery has a sufficient charge.

Allow the batteries to recharge for at least 4 hours. If the problem persists after recharging, replace the batteries.

Confirm the battery connections.

Reduce the load on the UPS by unplugging equipment.

For Computer Interface Port Specifications, see the APC Website.

3.Disconnect the two wires connecting the battery to the UPS. Loosen the wires by wiggling them while pulling straight back from the battery connector.

4.Connect the new battery in place of the old.

Note: Small sparks at the battery connections are

normal during connection.

5.Place the new battery in the UPS. Use care to avoid pinching the wires.

6.Close the battery compartment door and replace the screws.

7.Dispose of the old battery properly at an appropriate recycling facility or return it to the supplier in the packing material for the new battery. See the new battery instructions for more information.


If the UPS requires service do not return it to the dealer!

Follow these steps:

1.Use the Troubleshooting section to eliminate common problems. 2.Verify that no circuit breakers are tripped. A tripped circuit breaker is the

most common UPS problem!

3.If the problem persists, call customer service or visit the APC Internet Website (

Note the model number of the UPS, the serial number, and the date purchased. A technician will ask you to describe the problem and try to solve it over the phone, if possible. If this is not possible the technician will issue a Return Merchandise Authorization Number (RMA#).

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. Never use Styrofoam beads for packaging. Damage sustained in transit is not covered under warranty.

Include a letter with your name, RMA#, address, copy of the sales receipt, description of the trouble, your daytime phone number, and a check (if


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

6.Return the UPS by insured, prepaid carrier to the address below.

North & South America




132 Fairgrounds Road

Ballybritt Business Park

West Kingston, Rhode Island 02892 USA

Galway, Ireland 10800-702000






Acceptable input voltage

Input voltage (on-lineoperation)*

Output voltage *

Input Over Current Protection

Frequency limits (on-lineoperation)

Transfer time

Maximum load

On-batteryoutput voltage



Output Over Current Protection

Battery type

Typical battery life

420 VA

620 VA

0 - 160 VAC



Resettable circuit breaker

47 - 63 Hz

4 ms typical, blackout response time

420 VA 260 W

620 VA 390 W

115 VAC

50 or 60 Hz, ±0.1 Hz; unless synchronized to utility during brownout

Stepped sine-wave

Overcurrent and short-circuitprotected, latching shutdown on overload

Spill proof, maintenance free, sealed lead-acid

3 to 6 years, depending on number of discharge cycles and ambient temperature

Typical recharge time

2 to 5 hours from total discharge

Operating temperature

0 to +40 °C (+32 to +104°F)

Storage temperature

-15to +45°C (+5 to +113°F)

Operating and storage relative humidity

0 to 95%, non-condensing

Operating elevation

0 to +3,000 m (0 to +10,000 ft)

Storage elevation

0 to +15,000 m (0 to +50,000 ft)

Audible noise at 1 m (3 ft)


<45 dBA

Size (H x W x D)

16.8 x 11.9 x 36.8 cm


(6.6 x 4.7 x 14.5 in)

Weight - net (shipping)

10.0 (10.9) kg


12.3 (13.2) kg


22.0 (24.0) lb.


27.0 (29.0) lb.

Safety and approvals

UL 1778, UL 497A, CSA 107.1, FCC part 68

EMC verification

FCC/DOC Class B certified

Electromagnetic immunity

IEC 801-4level IV,801-5level III

* User-adjustablethrough PowerChute®plus (see software documentation).