Toshiba 1500 Plus ユーザーズマニュアル

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.

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.

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.