7.0Difficulty
7.1Troubleshooting (continued)
PROBLEM: | UPS does not provide expected back up time. |
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Possible cause: | UPS’s battery is weak from recent outage or wear. |
Solution: | The battery needs recharging after an extended |
| outage. The battery wears faster when put into service |
| often and when used at higher temperatures. |
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Possible cause: | UPS is overloaded. |
Solution: | Check load using UPS’s Output Power display (see |
| Sec. 5.2.2). Unplug |
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PROBLEM: | UPS shuts down if the Test button is held for more |
| than 4 seconds. |
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Possible cause: | UPS is overloaded. |
Solution: | Reduce the UPS’s load by unplugging equipment. |
| Check load using Output Power display (see Sec. 5.2.2). |
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Possible cause: | Weak battery. |
Solution: | Allow UPS to charge for at least five hours. If problem |
| persists, battery may need to be replaced. |
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PROBLEM: | Indicators on front panel flash in a “marquee” fashion. |
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Possible cause: | UPS has been shut down by computer software. |
Solution: | UPS will restart when AC power returns. |
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PROBLEM: | All indicators are lit and UPS emits constant tone. |
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Possible cause: | Internal UPS fault. |
Solution: | Do not attempt to use UPS. Turn off UPS and have it |
| serviced immediately. |
PROBLEM: | Site wiring fault light is |
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Possible cause: | Building wiring error such as missing ground or hot- |
| neutral reversal. |
Solution: | A qualified electrician should be summoned to correct |
| the building wiring. |
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