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Display
Re-
corded
1.
EXTBC1
N
2.
3.
1.
EXTBC2
N
2.
3.
FSOPEN
Y
Fuse Open.
INVOLNR
Y
Inverter Overload (Not Reset-
table) – Output overload condition
occurred.
INVOLR
Y
Inverter Overload (Resettable) –
Output overload condition oc-
curred.
OOC
Y
Output Overcurrent – UPS is over-
loaded.
VOOV
Y
Output Overvoltage – Output over-
voltage condition occurred.
VOUV
Y
Output Undervoltage – Output
undervoltage condition occurred.
16.4 System Warning Messages
Warning messages are generated when a noncritical abnormal operating condition occurs. The following
table shows possible messages and their meaning.
When a Warning condition exists, the amber LED on the UPS display panel will flash for the duration of
the Warning condition.
All warnings will clear after the appropriate action has been taken.
Display
Re-
corded
AOH
Y
Ambient Overheat – The unit is
overheated.
ASYN
N
Asynchronous mode – Input and
output frequency are different.
Bypass is disabled.
50
Meaning
BC1 Battery String 1, 2, or 3
Loose HCT Connection
BC1 Overvoltage Fault
BC1 Overcurrent Fault
BC2 Battery String 1, 2, or 3
Loose HCT Connection
BC2 Overvoltage Fault
BC2 Overcurrent Fault
TABLE 16-3: UPS WARNING MESSAGES
Meaning
T1000 Series UPS Installation and Operation Manual – 91074-002
Action
•
Call Toshiba for Service.
•
Call Toshiba for Service
•
Call Toshiba for Service
•
Call Toshiba for Service.
•
Call Toshiba for Service
•
Call Toshiba for Service
Replace fuse.
Reduce equipment load to 100% or less and
manually restart the UPS.
Reduce equipment load to 100% or less, the UPS
will retransfer.
Shut down excess equipment to reduce load.
UPS is possibly faulty. Check the UPS operation
conditions at time of fault. Not advisable to restart
the UPS. Call Toshiba for service.
UPS is possibly faulty. Check the UPS operation
conditions at time of fault. Not advisable to restart
the UPS. Call Toshiba for service.
Action
Check to see if the ambient temperature is greater
than 104 °F (40 °C) If so, turn on air conditioning
and check the ventilation fan at the back of the
unit for operation or obstructions. Otherwise, shut
down the unit and call Toshiba for service.
No Action Needed.
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