System Fault Messages - Toshiba 4400 Series Installation And Operation Manual

12.21

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 / EPO EMERGENCY STOP 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
INVOC INVERTER OVERCURRENT
INVOV INVERTER OVERVOLTAGE
INVUV INVERTER UNDERVOLTAGE
IOC INPUT OVERCURRENT
LDABNL LOAD ABNORMAL
NOCONN No connection established
OCERR Current is more than rated output current
OVABNL OUTPUT VOLTAGE ABNORMAL
PCBER UPS CONTROL CIRCUIT ERROR
PCHGER PRECHARGE FAULT
PHBRER BYPASS PHASE ROTATION ERROR
92
TABLE 12.4: 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.
Contact nearest Toshiba Authorized service representative.
Contact nearest Toshiba Authorized service representative.
Contact nearest Toshiba Authorized service representative.
Reduce Load. If problem persists, contact nearest Toshiba Authorized service
representative.
Lower load below 96%. If condition persists, Contact nearest Toshiba
Authorized service representative.
Contact nearest Toshiba Authorized service representative.
Lower Load and restart UPS. If condition persists, contact nearest Toshiba
Authorized service representative.
Contact nearest Toshiba Authorized service representative.
Check Fault Code on history log and present it to the nearest Toshiba
Authorized service representative .
Contact nearest Toshiba Authorized service representative.
Bypass phase rotation is reversed. Contact nearest Toshiba Authorized service
representative.
4400 Series Installation and Operation Manual – 64527-008
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