Filter
Top Products
TOSHIBA
5.0 Operating the UPS
5.3 Operation Monitoring
5.3.1 Visual 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").
5.3.2 Audible 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").
5.3.3 Visual and Audible Indicator Function Chart
5 - 3
Overcurrent (OC) Problem in chopper or 1) "Fault" LED 1) Auto
inverter circuit. is ON transfer
2) "On Line" to bypass
DC Bus Overvoltage (DCOV) DC Bus > 115% of rated. LED is OFF 2) Chopper
3) "AC Input" stopped
Ouput Overvoltage (OV) V out > 110% of rated. LED is ON 3) Inverter
stopped
Undervoltage (UV) V out < 85% of rated.
Overheat (OH) Heatsink exceeds 90º C.
Overload (OL) Output current and over-
load specifications have
been exceeded.
Battery problem Problem in battery 1) “Replace 1) Bypass or
circuit. Battery” On-Line
LED is ON mode.
Normal battery backup Loss of AC power 1) "Fault" LED 1) Chopper
operation is OFF running
2) "On Line" 2) Inverter
LED is ON running
3) "AC Input"
LED is OFF
Low battery voltage Battery voltage too low,
Shutdown imminent.
Condition Cause Visual
Indicators
ON
OFF
.5s .5s
2s
1.5s
ON
OFF
UPS
Operation
5s
70s
ON
OFF
1s
2s
ON
OFF
1s
.5s
ON
OFF
Audible
Alarm
Pattern