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1600EP Series Instruction Manual
System Fault Messages
When an abnormal operating condition occurs the following fault message will be displayed
FAULT (BYP OPER)
OUT-OV DC-OV >
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 CANCEL or RESET keys to view the messages explaining the system fault.
LCD Message LED Message Meaning/Action
Red
LED
Flashes
DC overcurrent condition occurred.
UPS is probably faulty. Check the
UPS operating conditions at time of fault. Not
advisable to try restarting. Call for service.
Red
LED
Flashes
Output overvoltage condition
occurred.
UPS is probably faulty. Check the UPS
operating conditions at time of fault. Not
advisable to try restarting. Call for service.
Red
LED
Flashes
Output undervoltage condition
occurred.
UPS is probably faulty. Check the UPS
operating conditions at time of fault. Not
advisable to try restarting. Call for service.
Red
LED
Flashes
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.
Red
LED
Flashes
Output overload condition occurred.
Reduce equipment load to 100% or
less and try restarting.
Red
LED
Flashes
DC voltage unbalance occurred.
Possible causes are UPS fault or
connection of half-wave rectier load. Check
load and try restarting. If condition persists, call
for service.
Red
LED
Flashes
Overheating condition occurred.
Check unit for blocked or in-operable
fan. Lower ambient temperature if it is 104 °F
(40 °C) or greater. Bypass operation will also
cease if overheat condition is not corrected within
1 hr. from inverter shutdown. Try restarting. If
condition re-occurs plan for total shutdown and
call for service.
On-Line/
Fault
On-Line/
Fault
On-Line/
Fault
On-Line/
Fault
On-Line/
Fault
On-Line/
Fault
On-Line/
Fault
DC-OC
OUT-0V
OVERLOAD
OUT-UV
DC-0V
DC-UNBALANCE
OVERHEAT
FAULT (BYP OPER)
OUT-0V DC-0V