APC 750 user manual 120V models only. Site wiring

Page 13

PROBLEM AND POSSIBLE

 

SOLUTION

 

 

CAUSE

 

 

 

THE OVERLOAD LED IS LIT AND THE UPS EMITS A SUSTAINED ALARM TONE

The UPS is overloaded.

 

 

The connected equipment exceeds the specified “maximum load” as de-

 

 

 

 

 

 

fined in Specifications at the APC web site, www.apc.com.

 

 

 

 

 

 

The alarm remains on until the overload is removed. Disconnect nonessen-

 

 

 

 

 

 

tial equipment from the UPS to eliminate the overload.

 

 

 

 

 

 

The UPS continues to supply power as long as it is online and the circuit

 

 

 

 

 

 

breaker does not trip; the UPS will not provide power from batteries in the

 

 

 

 

 

 

event of a utility voltage interruption.

 

 

 

 

 

 

If a continuous overload occurs while the UPS is on battery, the unit turns

 

 

 

 

 

 

off output in order to protect the UPS from possible damage.

 

 

 

 

 

 

 

THE REPLACE BATTERY LED IS LIT

 

Replace Battery LED flashes

 

Check that the battery connectors are fully engaged.

and short beep is emitted every

 

 

two seconds to indicate the

 

 

battery is disconnected.

 

 

 

Weak battery.

 

 

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

 

 

 

 

 

 

problem persists after recharging, replace the battery.

Failure of a battery 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-

 

 

 

 

 

 

test procedure after the battery has charged for 24 hours to confirm the

 

 

 

 

 

 

replace battery condition. The alarm stops and the LED clears if the bat-

 

 

 

 

 

 

tery passes the self-test.

 

 

 

 

 

 

THE SITE WIRING FAULT LED IS LIT

120V models only. Site wiring

 

Wiring faults detected include missing ground, hot-neutral polarity rever-

LED on rear panel

 

.

 

sal, and overloaded neutral circuit.

 

 

Contact a qualified electrician to correct the building wiring.

 

 

The UPS is plugged into an

 

 

 

improperly wired utility power

 

 

outlet.

 

 

 

 

 

 

 

THE INPUT CIRCUIT BREAKER TRIPS

The plunger on the circuit

 

Reduce the load on the UPS by unplugging equipment and press the

breaker (located to the right of

 

plunger in.

the input cable connection) pops

 

 

out.

 

 

 

 

 

 

 

 

 

 

 

AVR BOOST OR AVR TRIM LEDS LIGHT

Your system is experiencing

 

Have qualified service personnel check your facility for electrical prob-

excessive periods of low or high

 

lems. If the problem continues, contact the utility company for further

voltage.

 

 

assistance.

 

 

 

 

 

 

 

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Contents APC Smart-UPS Page Introduction Rail InstallationUnpacking Mounting the UPS in a Rack Positioning the UPSConnecting Equipment and Power to the UPS UPS. Use only interface kits supplied or approved by APC Operation On Battery Operation User Configurable Items 92VAC Disconnecting the Battery for Transport Replacing the Battery ModuleStorage Troubleshooting 120V models only. Site wiring Utility Voltage Contacting APC ServiceRegulatory Agency Approvals and Radio Frequency Warnings Declaration of Conformity Limited Warranty