
30
TROUBLESHOOTING
PROBLEM
DISPLAYED
POSSIBLE CAUSE
SOLUTION
EPO Active
EPO connector is open
Check the EPO connector status
Site Fail
The Ground wire is
disconnected or Phase
and neutral conductor at
input of UPS system are
reversed
Check the Ground wire status.
Reverse mains power wiring.
Battery Open
Battery is disconnected
Do the battery test.
Check the battery bank is connected to
the UPS.
Check the battery breaker is turned on.
Battery volt low
Battery voltage is low
When audible alarm sounding every
second, battery is almost empty.
Over load
Overload
Check the loads and remove non-critical
loads.
Check if some loads are failed.
Fan Fail
Fan abnormal
Check if the fan is running normally.
Charger Fail
The charge fails
Consult dealer.
Battery Over
Voltage
Battery voltage is higher
than normal value
Check if the battery quantity is correct.
Over Charge
Battery is over charged
The UPS will turn off the charger until the
battery voltage is normal
Amb NTC abnormal
The ambient temperature
is too high
Check the environment ventilation.
Ambient NTC
abnormal
UPS internal fault
Consult dealer.
Cable disconnect
The parallel cable is
disconnected
Check the parallel cable.
Cable loss
The parallel cable is
disconnected
Check the parallel cable.
Battery Differ
The battery packs
of some UPS are
disconnected
Check if all the battery pack is
connected.
Line Differ
The mains input of some
UPS is disconnected
Check the building wiring and input cable.
Check if the input breaker is closed.
Ensure the UPSs are connected to same
input source.
Warning Indication