Table of Contents
Advertisement
16.3 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.
All faults except EXTBC1 and EXTBC2 are recorded. The fault status can cleared by cycling UPS power
(turn off until the display goes blank, then turn on) after the problem has been fixed.
Display
Re-
corded
BYPOH
Y
Bypass Overheat – Overheating
condition occurred.
BYPOL
Y
Bypass Overload – UPS is over-
loaded.
CHRGOV
Y
Charger Overvoltage – Charger
overvoltage condition occurred.
CL
Y
Current Limit – Load on UPS out-
put exceeds unit specifications.
DCIB
Y
DC Bus Imbalance – DC voltage
imbalance occurred.
DCOC
Y
DC Bus Overcurrent – DC overcur-
rent condition occurred.
DCOV
Y
DC Bus Overvoltage – DC over-
voltage condition occurred.
DCUVBS
Y
DC Bus Undervoltage during
Boostup Mode – DC Bus under-
voltage condition occurred.
DCUVC
Y
DC Bus Undervoltage During
Charging Mode – DC Bus under-
voltage condition occurred.
DVCOH
Y
Device Overheat – Overheating
condition occurred.
T1000 Series UPS Installation and Operation Manual – 91074-002
TABLE 16-2: UPS FAULT MESSAGES
Meaning
Check unit for blocked or in-operable fan. Lower
ambient temperature if it is greater than 104 °F (40
°C). Bypass operation will also cease if overheat
condition is not corrected within 1 hr. of inverter
shutdown. Try restarting. If condition repeats plan
for total shutdown and call for service.
Shut down excess equipment to reduce load.
UPS is faulty. Check the UPS operation conditions
at time of fault. Not advisable to restart the UPS.
Call Toshiba for service.
Reduce load on UPS output.
Possible causes of UPS fault are connection of
half-wave rectifier load. Check load and try restart-
ing. If condition persists,call Toshiba for service.
UPS is faulty. Check the UPS operation conditions
at time of fault. Not advisable to restart the UPS.
Call Toshiba for service.
UPS is faulty, input wiring error, input overvoltage
or connection of a motor load. Try restarting. If con-
dition persists call Toshiba for service.
UPS is faulty. Check the UPS operation conditions
at time of fault. Not advisable to restart the UPS.
Call Toshiba for service.
UPS is faulty. Check the UPS operation conditions
at time of fault. Not advisable to restart the UPS.
Call Toshiba for service.
Reduce equipment load to 100% or less and try
restarting.
Action
49
Advertisement
Table of Contents
