Operation
Table 7 | Alarms, functions, and corrective actions (continued) |
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Actual |
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Alarm/fault |
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Name |
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Displayed |
| Description | Fault |
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On Front |
| of Alarm/ | Or | Latch | Dial | Freeze | Event Log |
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Panel |
| Fault | Alarm | Mask | Mask | Mask | Mask | Meaning and Corrective Action(s) | |
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| With the load on Static Bypass, the phase A | |
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| output kVA or kW or RMS current has | |
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| exceeded 115% of the nominal | |
SBS Ovld |
| SBS Overload | Alarm | NO | NO | NO | YES | kVA or kW or RMS current rating. The UPS | |
Phase A |
| Phase A | will show time remaining until a shutdown | ||||||
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| will occur, per the Overload vs. time curve. | |
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| The alarm will clear when the overload falls | |
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| to below 110% of the rating. | |
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| With the load on Static Bypass, the phase B | |
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| output kVA or kW or RMS current has | |
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| exceeded 115% of the nominal | |
SBS Ovld |
| SBS Overload | Alarm | NO | NO | NO | YES | kVA or kW or RMS current rating. The UPS | |
Phase B |
| Phase B | will show time remaining until a shutdown | ||||||
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| will occur, per the Overload vs. time curve. | |
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| The alarm will clear when the overload falls | |
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| to below 110% of the rating. | |
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| With the load on Static Bypass, the phase C | |
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| output kVA or kW or RMS current has | |
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| exceeded 115% of the nominal | |
SBS Ovld |
| SBS Overload | Alarm | NO | NO | NO | YES | kVA or kW or RMS current rating. The UPS | |
Phase C |
| Phase C | will show time remaining until a shutdown | ||||||
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| will occur, per the Overload vs. time curve. | |
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| The alarm will clear when the overload falls | |
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| to below 110% of the rating. | |
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| The instantaneous inverter current of any | |
Inverter I |
| Inverter |
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| one phase has exceeded its | |
| Alarm | NO | NO | NO | YES | current limit value. The UPS will shutdown | |||
Limit |
| Current Limit | |||||||
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| when the Current Overload vs. time curve is | |||
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| exceeded. | |
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| Output frequency differs from the nominal | |
Output OF/UF | Output OF/UF | Alarm | NO | YES | NO | YES | (60Hz) by more than 0.5Hz. No transfer or | ||
shutdown occurs. Contact Liebert Global | |||||||||
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| Services at once. | |
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| With the load on UPS, Phase x output KVA | |
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| or KW or RMS current has exceeded 105% | |
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| Inverter |
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| of the nominal per phase rating. The UPS | |
Inv Ovld |
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| will begin sending the time remaining until a | ||
| Overload | Alarm | NO | YES | NO | YES | |||
Phase A |
| transfer or shutdown will occur, per the | |||||||
| Phase A |
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| Overload vs. Time Curve. The alarm | ||
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| condition will clear when the overload | |
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| returns to below the nominal rating. | |
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| With the load on UPS, Phase A output kVA | |
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| or kW or RMS current has exceeded 105% | |
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| Inverter |
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| of the nominal per phase rating. The UPS | |
Inv Ovld |
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| will begin sending the time remaining until a | ||
| Overload | Alarm | NO | YES | NO | YES | |||
Phase B |
| transfer or shutdown will occur, per the | |||||||
| Phase B |
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| Overload vs. Time Curve. The alarm | ||
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| condition will clear when the overload | |
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| returns to below the nominal rating. |
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