Operation Monitoring; Visual Indicator Functions; Audible Alarm Functions; Visual And Audible Indicator Function Chart - Toshiba 1500 Plus Series Operation Manual

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
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
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

Condition
Overcurrent (OC)
DC Bus Overvoltage (DCOV) DC Bus > 115% of rated.
Ouput Overvoltage (OV)
Undervoltage (UV)
Overheat (OH)
Overload (OL)
Battery problem
Normal battery backup
operation
Low battery voltage
supplied to the UPS unit.
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").
Cause
Problem in chopper or
inverter circuit.
V out > 110% of rated.
V out < 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,
Shutdown imminent.
5 - 3
Audible
Visual
Alarm
Indicators
Pattern
1) "Fault" LED
is ON
2) "On Line"
ON
LED is OFF 2) Chopper
3) "AC Input"
OFF
LED is ON
1.5s
2s
ON
OFF
.5s .5s
ON
1) "Replace
OFF
Battery"
LED is ON
2s
1s
ON 1) "Fault" LED 1) Chopper
is OFF
OFF
2) "On Line"
70s
5s
LED is ON
3) "AC Input"
ON
LED is OFF
OFF
.5s
1s
UPS
Operation
1) Auto
transfer
to bypass
stopped
3) Inverter
stopped
1) Bypass or
On-Line
mode.
running
2) Inverter
running