PowerWalker VFI 6000T LCD - Manual (Page 52)

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7.2 Trouble Shooting According To Fault Indication
Problem Displayed Possible cause Remedy
Inv Overload Fault Overload Check the loads and remove
some non-critical loads.
Check if some loads are failed.
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
Check the ventilation of UPS
and the ambient temperature.
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.
Fan lock fault Fan blocked or
disconnected over time Check the fan status
Back Feed Output voltage is
returned to input Consult dealer