TOSHIBA
Fault
Display status
Probable cause
Corrective action
Remove cause of
Output low
Inverter fault or short
short circuit. If none is
voltage
circuit in UPS output
found, contact your
Toshiba service
representative.
Output
Resonance with load
Remove load
overvoltage
equipment
equipment one piece
at a time.
DC
Chopper fault
Contact your Toshiba
undervoltage
service representative.
Check for airflow
Cooling fin
Cooling fan outage or
restriction. If none is
overheating
closed cooling airflow
found, contact your
path
Toshiba service
representative.
Battery damaged or
Battery
something wrong in the
Contact your Toshiba
problem
battery circuit (battery may service representative.
not be connected)
Output
Capacity of load
Review UPS rating
overload
equipment to high
or reduce load
equipment.
7.0
Troubleshooting Procedures
Faults are those abnormal conditions that can occur and cause the unit to shutdown normal
operation. The faults are detected by the protection circuitry (see System Protection Features
Section 5.2) in the unit. The UPS Fault lamp will light
red
. "Troubleshooting" involves monitoring
the bar graph lamps on the front panel and then interpreting the readout by using the fault mode
display charts.
7.1
Non-Fatal Fault Mode
Non-fatal faults may or may not cause the unit to shut down. These faults normally will
cause the UPS to transfer to bypass mode. Use "System Restart" procedures (see
Section 5.10) to transfer the UPS back to On Line mode. Use the following chart to
decode the display. All non-fatal faults will cause the red Fault LED to flash.
Non-Fatal Fault Mode Display Chart
7 - 1
Summary of Contents for 1500 Plus Series
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