N1C NE Series User Manual
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74 All rights reserved ©N1 Critical Technologies, Inc.NE Series (20-30kVA)User ManualChapter 6 TroubleshootingNo. Phenomenon Possible reason9 There is mains, but the buzzerbeeps intermittently, mainsindicator is off.Voltage or frequency of mains exceeds the range ofUPS.10 Under mains status, the UPSworks normally; however, afterpower outage, the UPS worknormally but the device stops.Bad grounding causes the float voltage between neutralwire and grounding wire being too high.11 All the indicators on the panelof the UPS are not lit on.The connection of display controlling board of the UPSis bad or failure.6.3 Emergency Troubleshooting Emergency for the fault of signal-unitWhen the single-unit faults, it is necessary to close the power supply of UPS by OFF button onthe panel. If necessary, close the user load, and disconnect the input/output switch of UPS, whichis to avoid further damage of the UPS. Emergency for the fault of UPS 1 and UPS 2 in series backup systemWhen the UPS 1 of the series backup system fault, it is necessary to close the power supply ofUPS1 by OFF button on the panel. At the same time, disconnect the mains input switch and batteryswitch of UPS 1 (UPS1 or battery cabinet). Inform the engineering technician to maintain.When the UPS 2 fault, it is necessary to close the power supply of UPS2 by OFF button on thepanel. At the same time, disconnect the mains input switch and battery switch of UPS 2 (UPS2 orbattery cabinet). Inform the engineering technician to maintain. Emergency for the fault of the single-unit in parallel systemWhen the single-unit in parallel system fault, it is necessary to close the power supply of UPS byOFF button on the panel. Then disconnect the switch of AC input, output and battery (UPS 1orbattery cabinet). Inform the engineering technician to maintain. |
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