Troubleshooting Procedures; Non-Fatal Fault Mode - Toshiba Black Gold TB Series Operation Manual

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 whenever a fault condition has been
detected. "Troubleshooting" involves monitoring the OUTPUT/BATTERY level meter 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; non-fatal faults normally will
cause the UPS to transfer to bypass mode. Use System Reset procedures (See Section
5.10). Use the following chart to decode the display.
Fault
Output low
voltage
Output
overvoltage
DC
undervoltage
Cooling fan
overheating
Battery
problem
TOSHIBA
Non-Fatal Fault Mode Display Chart
Display Status
Red and
Green Inverter fault or short
LED flash circuit in UPS output
alternately
Red and
Green Resonance with load
LED flash equipment
alternately
Red and
Green
Chopper fault
LED flash
alternately
Red and
Cooling fan outage or
Green
closed cooling airflow
LED flash
path
alternately
Red and Battery damaged or
Green something wrong in the
LED flash battery circuit (battery not
alternately connected)
23
Problem Cause
Remove cause of
short circuit. If none is
found, contact your
Toshiba service
representative.
Remove load
equipment one piece
at a time.
Contact your Toshiba
service representative.
Check for airflow
restriction. If none is
found, contact your
Toshiba service
representative.
Contact your Toshiba
service representative.
Corrective Action