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82 4200FA Installation and Operation Manual
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.
Table 9.13 System Fault Messages
Display
Meaning
Action
BYPOH
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.
CL
Current Limit – UPS not
within specifications.
Contact the nearest Toshiba authorized representative for
service.
COV
Charger Overvoltage –
Charger overvoltage
condition occurred.
Contact the nearest Toshiba authorized representative for
service.
DCOC
DC Bus Overcurrent –
DC overcurrent
condition occurred.
UPS is possibly faulty. Check the UPS operation conditions at
time of fault. Not advisable to restart the UPS. Call for service.
DCOV
DC Bus Overvoltage –
DC overvoltage
condition occurred.
UPS is possible faulty, input wiring error, input overvoltage or
connection of a motor load. Try restarting. If condition persists call
for service.
DCUB
DC bus unbalanced.
UPS is possibly faulty. Check the UPS operation conditions at
time of fault. Not advisable to restart the UPS. Call for service.
DCUVBS
DC Bus Undervoltage
during Boostup Mode –
DC Bus undervoltage
condition occurred.
UPS is possibly faulty. Check the UPS operation conditions at
time of fault. Not advisable to restart the UPS. Call for service.
DCUVC
DC Bus Undervoltage
During Charging Mode
– DC Bus undervoltage
condition occurred.
UPS is possibly faulty. Check the UPS operation conditions at
time of fault. Not advisable to restart the UPS. Call for service.
DOH
Device Overheat –
Overheating condition
occurred.
Reduce equipment load to 100% or less and try restarting.
OOC
Output Overcurrent –
UPS is overloaded.
Shutdown excess equipment to reduce load.
PHBRER
Bypass phase rotation
error.
Bypass phase rotation is reversed. Switch any two input cable
connections: A and B, B and C, or C and A.
PHIRER
Input phase rotation
error.
Input phase rotation is reversed. Switch any two input cable
connections: A and B, B and C, or C and A.
UPSOL
UPS Overload.
Reduce equipment load to 100% or less.
VOOV
Output Overvoltage –
Output overvoltage
condition occurred.
UPS is possibly faulty. Check the UPS operation conditions at
time of fault. Not advisable to restart the UPS. Call for service.
VOUV
Output Undervoltage –
Output undervoltage
condition occurred.
UPS is possibly faulty. Check the UPS operation conditions at
time of fault. Not advisable to restart the UPS. Call for service.