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5.0
Operating the UPS
5.3
Operation Monitoring
5.3.1
5.3.2
5.3.3
Condition
Overcurrent (OC)
DC Bus Overvoltage (DCOV)
Output Overvoltage (OV)
Undervoltage (UV)
Overheat (OH)
Overload (OL)
Battery problem
Normal battery backup
operation
Low battery voltage
(voltage less than 90%)
TOSHIBA
Visual Indicator Functions
The following LED (light emitting diode) indicators are located on the front panel
(See Section 5.4 Front 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 LINE: This green LED lights when normal ac input power is being
supplied to the UPS unit.
2) INVERTER: 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).
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).
Visual and Audible Indicator Function Chart
Cause
Problem in chopper or
inverter circuit.
Vout > 115% of rated.
Vout > 110% of rated.
Vout < 85% of rated.
Heatsink exceeds 90º C.
Output current and over-
load specifications have
been exceeded.
Problem in battery
circuit.
Loss of AC power
Battery voltage too low.
Audible
Alarm
Pattern
1) "Fault" LED
ON
2) "Inverter
OFF
3) "AC Line"
2s
1.5s
ON
OFF
.5s
.5s
ON
OFF
1s
2s
1) "Fault" LED
ON
OFF
2) "Inverter"
70s
5s
3) "AC Line"
ON
OFF
1s
.5s
17
Visual
UPS
Indicators
Operation
1) Auto
is ON
transfer
to
bypass
LED is OFF
2) Chopper
stopped
LED is ON
3) Inverter
stopped
1) Chopper
is OFF
running
2) Inverter
LED is ON
running
LED is OFF
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