TOSHIBA
5.0Operating the UPS
5.3Operation Monitoring
5.3.1Visual Indicator Functions
The following LED (light emitting diode) indicators are located on the front panel (see Section 9.2 "Panel Layout"). Refer to these lamps for visual information about the operating condition of the UPS (see Section 5.3.3 "Visual and Audible Indicator Function Chart").
1)AC Input: This green LED lights when normal ac input power is being supplied to the UPS unit.
2)On Line: This green LED lights when the inverter output voltage is normal.
3)Fault: This red LED lights when an abnormal operating condition is detected. Operation of the unit's inverter is inhibited until the fault has been corrected and the system reset (see Section 5.10 "System Reset").
5.3.2Audible Alarm Functions
The UPS is equipped with an audible alarm system which activates under various operating conditions. Sound patterns are used to indicate these conditions (see Section 5.3.3 "Visual and Audible Indicator Function Chart"). Alarms for the battery backup mode or low battery voltage will stop automatically when AC input voltage is restored. Alarms for a fault condition will continue to sound until the UPS has been reset (see Section 5.10 "System Reset").
5.3.3Visual and Audible Indicator Function Chart
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Overcurrent (OC) | Problem in chopper or |
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| 1) "Fault" LED | 1) Auto |
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| is ON | transfer |
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| ON | 2) "On Line" | to bypass |
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DC Bus Overvoltage (DCOV) | DC Bus > 115% of rated. |
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| LED is OFF | 2) Chopper | |
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| OFF | 3) "AC Input" | stopped |
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Ouput Overvoltage (OV) | V out > 110% of rated. |
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| LED is ON | 3) Inverter | |
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Undervoltage (UV) | V out < 85% of rated. |
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Overheat (OH) | Heatsink exceeds 90º C. |
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Overload (OL) | Output current and over- |
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| ON |
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| load specifications have |
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| .5s | .5s |
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Battery problem | Problem in battery |
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| ON | 1) “Replace | 1) Bypass or |
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| OFF | Battery” | |
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| 1s | 2s | LED is ON | mode. | ||
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Normal battery backup | Loss of AC power |
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| ON | 1) "Fault" LED | 1) Chopper |
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| OFF | is OFF | running |
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| 2) "On Line" | 2) Inverter | |
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| 5s | 70s | LED is ON | running | ||
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| 3) "AC Input" |
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| ON |
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Low battery voltage | Battery voltage too low, |
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| OFF |
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| Shutdown imminent. |
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| 1s | .5s |
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