System Fault Messages - Toshiba 5000 SERIES Installation And Operation Manual

12.20

System Fault Messages

A Fault message is generated when either a fault condition occurs, or a warning condition occurs three
times within ten minutes. The table below shows the possible fault messages and what actions need be
taken.
If the input voltage is normal when the fault occurs then the UPS will switch immediately to the bypass mode
to continuously feed power to the load.
If the fault condition occurs while the input power is abnormal and the UPS is in Bypass mode the UPS will
shut down the output to prevent load equipment damage.
When a Fault condition exists, the red LED on the UPS display panel will illuminate until the fault is cleared.
Display
Display Meaning
COC CHOPPER OVERCURRENT
DBUSAB DC CIRCUIT ABNORMAL
DCOV DC OVERVOLTAGE
DCUB DC UNBALANCED
DCUV DC UNDERVOLTAGE
DMYFLT DUMMY FAULT
DOH OVERTEMPERATURE
EPOTR/ EMERGENCY STOP
EPO ACTIVATED
GVERR CONTROL POWER SUPPLY
ABNORMAL
INABNL INPUT CIRCUIT ABNORMAL
INVABN INVERTER VOLTAGE
ABNORMAL
INVBYP UPS CONTROL CIRCUIT
ERROR
INVCER OUTPUT CIRCUIT ABNORMAL
INVERR UPS CONTROL CIRCUIT
ERROR
66
TABLE 12.5: SYSTEM FAULT MESSAGES
System Fault Messages
Meaning
Action
Contact nearest Toshiba Authorized service
representative.
Contact nearest Toshiba Authorized service
representative.
UPS is possibly faulty, input wiring error, input
overvoltage or connection of a motor load. Try
restarting. If condition persists, call for service.
Contact nearest Toshiba Authorized service
representative.
UPS is possibly faulty, input wiring error, input
overvoltage or connection of a motor load. Try
restarting. If condition persists, call for service.
Used by Engineering to troubleshoot issues.
Reduce equipment load to 100% or less and try
restarting.
Emergency stop activated. Restart UPS after
Emergency cleared.
Contact nearest Toshiba Authorized service
representative.
Contact nearest Toshiba Authorized service
representative.
Voltage out of spec. Contact nearest Toshiba
Authorized service representative.
Inverter voltage/Bypass Voltage is out of spec. Contact
nearest Toshiba Authorized service representative.
Contact nearest Toshiba Authorized service
representative.
Inverter voltage is out of spec. Contact nearest
Toshiba Authorized service representative.
5000 Series NEMA-3R 3-Phase UPS Installation and Operation Manual – 92975-000
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