Troubleshooting
7.0TROUBLESHOOTING
If any technical problems should occur, check the following before contacting Liebert® technical support:
•Is the utility voltage present at the UPS input?
•Has the input fuse blown or have the circuit breakers tripped?
•Has the UPS startup procedure been followed correctly?
When contacting Liebert technical support, have the following information available:
•Device model number
•Serial number (from the nameplate)
•Exact description of the problem (what loads are being operated, does the problem occur regularly or sporadically, etc.)
For descriptions of the indicators mentioned in the following table, see 4.2.1 - Controls and Messages.
Table 8 | Troubleshooting guide |
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| Problem |
| Possible Cause | Solution |
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| Utility mains switched off | Switch on utility breaker |
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No display |
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| No mains voltage present | Have utility mains inspected by a qualified |
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| technician | ||
No alarm |
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(UPS switched Off) |
| Input fuse blown or input | Replace with fuse of same type or switch on circuit | |
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| breaker. If the problem persists, contact technical | |
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| circuit breaker tripped | |
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| support. | |
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UPS on LED does not light up, |
| No utility mains voltage | Have utility mains inspected by a qualified | |
alarm beeps sound at intervals |
| present | technician | |
UPS on LED does not illuminate |
| Input fuse defective or input | Replace with fuse of same type or switch on circuit | |
when utility mains voltage present, |
| breaker. If the problem persists, contact technical | ||
| circuit breaker tripped | |||
acoustic alarm active at intervals |
| support | ||
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FAULT LED illuminates, alarm |
| UPS error | Contact technical support | |
sounding constantly |
| Overheating | Decrease ambient temperature | |
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| The battery breaker is open, | Move the battery breaker to the ON position |
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| in the OFF position | |
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| Charge batteries (see Battery Test on page 19) |
Battery Run time less than specified |
| Batteries are not fully charged | and test backup time. If the problem persists, | |
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| contact technical support. |
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| Batteries are defective | Contact technical support |
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| Charging device is defective | Contact technical support |
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OVERLOAD message displayed |
| Overload at UPS output | Reduce load to the permissible value | |
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| Wrong serial connection | Check whether the correct cable has been used |
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| (standard modem/null modem cables are not | |
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| cable | |
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| permissible) | |
No communication between UPS |
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| Interface on the PC is being | Check whether other software/service is accessing | ||
and PC |
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| used by another process or is | the interface on the PC; try selecting a different | |
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| defective | serial interface |
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| Interference on the data cable | Lay cable differently/Reinstall cabling |
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