37
TOSHIBA
LCD Message
Meaning/Action
System Fault Messages
When an abnormal operating condition occurs the following fault message will be displayed:
Meaning:
DC overcurrent condition occurred.
Action:
UPS is probably faulty. Check the UPS
operating conditions at time of fault. Not advisable
to try restarting.
Call for service
.
LED Message
Red
LED
On
Meaning:
DC overvoltage condition occurred.
Action:
UPS is possible faulty, wiring error, input
overvoltage or connection of a motor load. Try
restarting. If condition persists call for service.
Red
LED
On
Meaning:
Output overload condition occurred.
Action:
Reduce equipment load to 100% or less
and try restarting.
Red
LED
On
Meaning:
Output overvoltage condition occurred.
Action:
UPS is probably faulty. Check the UPS
operating conditions at time of fault. Not advisable
to try restarting.
Call for service
.
Red
LED
On
Meaning:
Output undervoltage condition occurred.
Action:
UPS is probably faulty. Check the UPS
operating conditions at time of fault. Not advisable
to try restarting.
Call for service
.
Red
LED
On
Meaning:
DC voltage unbalance occurred.
Action:
Possible causes are UPS fault or
connection of half-wave rectifier load. Check load
and try restarting. If condition persists, call for
service.
Red
LED
On
Meaning:
Overheating condition occurred.
Action:
Check unit for blocked or in-operable fan.
Lower ambient temperature if 40° C or greater.
Bypass operation will also cease if overheat
condition is not corrected within 1 hr. from inverter
shutdown. Try restarting and if condition re-occurs
plan for total shutdown and call for service.
Red
LED
On
Display Screens (cont'd)
DC-OC
OUT-OV
OUT-UV
DC-OV
OVERLOAD
DC-UNBALANCE
OVER HEAT
FAULT (BYP OPER)
OUT-0V DC-0V >
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 input power is abnormal while in the bypass mode the UPS will shut
down the output to prevent load equipment damage.
Press
Key:
or
to view the messages explaining the system fault (the ">" indicates other
faults:
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