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Pos Bus Over Volt
UPS internal fault, the + DC
BUS voltage is too high
Consult dealer
Neg Bus Over Volt
UPS internal fault, the -DC
BUS voltage is too high
Consult dealer
Pos Bus Under Volt
UPS internal fault, the + DC
BUS voltage is too low
Consult dealer
Neg Bus Under Volt
UPS internal fault, the -DC
BUS voltage is too low
Consult dealer
Bus Unbalance
UPS internal fault, the
voltage difference between
DC Bus+ and DC bus- is too
large
Consult dealer
Bus Short
UPS internal fault
Consult dealer
Bus Soft Start Fail
UPS internal fault
Consult dealer
Output Short circuit
abnormally low impedance
placed on its output and
considers it a short circuit
Remove all the loads. Turn off the UPS;
Check if UPS output and loads is short
circuit;
Ensure short circuit is removed before
turning on again
L1 Output Short circuit
L2 Output Short circuit
L3 Output Short circuit
Inverter Over Volt
UPS internal fault, the
inverter voltage is too high
Consult dealer
Inverter Under Volt
UPS internal fault, the
inverter voltage is too low
Consult dealer
Inverter Soft start Fail
UPS internal fault
Consult dealer.
Inverter Overload Fault
Overload
Check the loads and remove some
noncritical loads;
Check if some loads are failed
Output Overload Fault
Byp Overload Fault
Inverter Capacity Open
UPS internal fault
Consult dealer
Primary SPS Fail
UPS internal fault
Consult dealer
Assist SPS Fail
Emergency Off
Perform emergency
shutdown
Check the status of RPO terminal
Internal Over Temp Fault
Inside temperature of UPS is
too high
Check the ventilation of UPS and the
ambient temperature
Byp SCR Over Temp
Charger Over Temp Fault
UPS Ambient Over Temp
The ambient temperature is
too high
Check the environment ventilation
Fan Lock
Fan abnormal
Check if the fan is running normally or fan
detection cable disconnected
ESS Fan lock
Model Setting Wrong
Wrong work mode
Consult dealer
Neg Power Fault
Negative power fault
Consult dealer
Para. Cable Lost
The cable is not connected Please confirm the connection status of the
parallel cable
Para. Incompatible
Para setting different
Please check the parallel settings, if it still
alarms, please consult dealer.
IoT disconnected
IoT is disabled
Enable IoT function in LCD
Others
Please refer to Winpower View app help file