The LCD reporting screen in the XRT1000 and above UPS’s allows much more flexibility in communicating faults to you, and therefore has two classes of fault messages. The first occurs when the unit is initially turned on as explained above, and the second is if a fault is detected during normal operation or testing.
Model XRT1000 and above error messages
LCD DISPLAY | POSSIBLE CAUSE | ACTION TO TAKE |
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Input AC Low | Low AC input | Verify Incoming AC |
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Input AC High | Input AC is too high | Verify Incoming AC |
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Input | Input AC frequency out of | Verify incoming freq. for this |
Frequency Bad | range for unit. | model. |
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Over current | Excessive output current being | Verify output load matches unit. |
| drawn |
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Check fan | Fan not running | Verify nothing has gotten into fan. |
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Over temp | Fan or air passages blocked | Clear air passages. |
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Battery Bad | Battery pack is bad or | Check battery voltage and |
| disconnected | connections. |
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Hardware fault | UPS has had a hardware fault | Call for service |
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Output AC high | Output voltage is too high | Call for service |
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Output AC low | Output voltage is too low | Call for service |
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The Initial Error Message can be cleared by pressing any button. If the fault is cleared, then the fault existed from a prior shutdown. If the fault is not cleared then the fault presently exists. If the previous fault was due to a low battery condition and the AC line returns to normal, the UPS will automatically
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