PROBLEM AND POSSIBLE |
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| CAUSE |
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THE OVERLOAD LED IS LIT AND THE UPS EMITS A SUSTAINED ALARM TONE | ||||||
The UPS is overloaded. |
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| The connected equipment exceeds the specified “maximum load” as de- | |||
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| fined in Specifications at the APC web site, www.apc.com. |
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| The alarm remains on until the overload is removed. Disconnect nonessen- |
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| tial equipment from the UPS to eliminate the overload. |
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| The UPS continues to supply power as long as it is online and the circuit |
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| breaker does not trip; the UPS will not provide power from batteries in the |
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| event of a utility voltage interruption. |
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| If a continuous overload occurs while the UPS is on battery, the unit turns |
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| off output in order to protect the UPS from possible damage. |
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THE REPLACE BATTERY LED IS LIT |
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Replace Battery LED flashes |
| Check that the battery connectors are fully engaged. | ||||
and short beep is emitted every |
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two seconds to indicate the |
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battery is disconnected. |
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Weak battery. |
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| Allow the battery to recharge for 24 hours. Then, perform a | |||
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| problem persists after recharging, replace the battery. |
Failure of a battery |
| The UPS emits short beeps for one minute and the replace battery LED | ||||
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| illuminates. The UPS repeats the alarm every five hours. Perform the self- |
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| test procedure after the battery has charged for 24 hours to confirm the |
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| replace battery condition. The alarm stops and the LED clears if the bat- |
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| tery passes the |
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THE SITE WIRING FAULT LED IS LIT | ||||||
120V models only. Site wiring |
| Wiring faults detected include missing ground, | ||||
LED on rear panel |
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| sal, and overloaded neutral circuit. | ||
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| Contact a qualified electrician to correct the building wiring. | ||||
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The UPS is plugged into an |
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improperly wired utility power |
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outlet. |
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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 |
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out. |
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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. |
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| assistance. | |||
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11
