49
Byp Overload Fault Overload
Check the loads and remove some
non-critical loads.
Check if some loads are failed.
Output Short Circuit Output 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.
Heatsink Over
Temperature Fault
Inside temperature
of UPS is too high
Make sure the UPS is not overloaded;
the air vents are not blocked and the
ambient temperature is not too high.
Wait for 10 minutes for the UPS to
cool down before turning on again. If
failed, please contact the distributor or
service center.
Bus Over Voltage
UPS internal fault
Consult dealer.
Bus Under Voltage
UPS internal fault
Consult dealer.
Bus Unbalance
UPS internal fault
Consult dealer.
Bus short
UPS internal fault
Consult dealer.
Bus Softstart Fail
UPS internal fault
Consult dealer.
Inv Over Voltage
UPS internal fault
Consult dealer.
Inv Under Voltage
UPS internal fault
Consult dealer.
Inv Softstart Fail
UPS internal fault
Consult dealer.
Negative Power
Fault
The load is pure
inductive and
capacitive
Remove some non-critical loads.
Bypass supplies the load first, ensure
there is no overload, then turn on
UPS.
Cable male and
female Loss fault
The parallel cable is
disconnected
Check the parallel cable.
Backfeeder
UPS internal fault
Don’t tou
ch any terminal of the
equipments which connect one utility
power with the UPS even you cut off
the utility power. Please Consult
dealer.
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