8. Troubleshooting
Problem | Possible Cause | Solution |
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| On/test button not | Press the on/test button to power the unit |
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Unit will not turn on. | Unit’s input circuit breaker | Reduce the load on the unit by unplugging |
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equipment and reset the circuit breaker by |
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| tripped. |
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| pressing the plunger back in. |
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| Very low or no utility | Check the AC power supply to the unit |
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| with a table lamp. If very dim, have the |
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| voltage. |
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| utility voltage checked. |
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| Disconnect the computer interface or |
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Unit will not turn on or | Computer interface or | accessory. If the unit now works normally, |
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off. | accessory problem. | check the interface cable, the attached |
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| computer, and the accessory. |
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| Unit’s input circuit breaker | Reduce the load on the unit by unplugging |
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Unit operates | tripped. | equipment and reset the circuit breaker. |
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even though normal line |
| Test the input voltage with the utility |
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voltage is thought to | Very high, low, or | voltage display. See section 5.6. Inexpensive |
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exist. | fuel powered generators can distort the |
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distorted line voltage. |
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| voltage. If acceptable to the load, reduce |
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| the unit’s sensitivity. See section 5.9. |
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Unit beeps occasionally. | Normal operation. | None. The unit is protecting the load. |
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| Charge the battery. The unit"s batteries |
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| require recharging after an extended |
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| The unit’s battery is weak | outage. Batteries wear faster when put into |
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| due to recent outage or is | service often and when operated at |
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Unit does not provide | near the end of its service | elevated temperatures. If the battery is near |
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life. | the end of its service life, consider |
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expected back up time. |
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| replacing the battery even if the replace |
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| battery indicator is not yet lit. |
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| Check the unit’s load display. See section |
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| The unit is overloaded. | 5.4. Unplug less needed equipment, such as |
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| printers. |
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Front panel indictors | The unit has been shut | None. The unit will restart automatically |
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flash sequentially. | down by remote control. | when utility power returns. |
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All indicators are lit and |
| Do not attempt to use the unit.. Turn the |
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the unit emits a constant | Internal unit fault. |
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unit off and have it serviced immediately. |
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tone. |
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17
