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1600XP Series Installation and Operation Manual
24.3 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 are recorded. The fault status can cleared by cycling power (turn off, then turn on) after the prob-
lem has been xed.
Display Record-
ed
Meaning Action
BYPOH Y Bypass Overheat – Overheating
condition occurred.
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 re-occurs plan
for total shutdown and call for service.
BYPOL Y Bypass Overload – UPS is over-
loaded.
Shut down excess equipment to reduce load.
CHRGOV Y Charger Overvoltage – Charger
overvoltage condition occurred.
UPS is faulty. Check the UPS operation conditions
at time of fault. Not advisable to restart the UPS.
Call Toshiba for service.
CLMT Y Current Limit – Load on UPS out-
put exceeds unit specications.
Reduce load on UPS output.
DCIB Y DC Bus Imbalance – DC voltage
imbalance occurred.
Possible causes are UPS fault are connection of
half-wave rectier load. Check load and try restart-
ing. If condition persists,call Toshiba for service.
DCOC Y DC Bus Overcurrent – DC overcur-
rent condition occurred.
UPS is faulty. Check the UPS operation conditions
at time of fault. Not advisable to restart the UPS.
Call Toshiba for service.
DCOV Y DC Bus Overvoltage – DC over-
voltage condition occurred.
UPS is faulty, input wiring error, input overvoltage
or connection of a motor load. Try restarting. If con-
dition persists call Toshiba for service.
DCUVBS Y DC Bus Undervoltage during
Boostup Mode – DC Bus under-
voltage condition occurred.
UPS is faulty. Check the UPS operation conditions
at time of fault. Not advisable to restart the UPS.
Call Toshiba for service.
DCUVC Y DC Bus Undervoltage During
Charging Mode – DC Bus under-
voltage condition occurred.
UPS is faulty. Check the UPS operation conditions
at time of fault. Not advisable to restart the UPS.
Call Toshiba for service.
DVCOH Y Device Overheat – Overheating
condition occurred.
Reduce equipment load to 100% or less and try
restarting.
FSOPEN Y Fuse Open. Replace fuse.