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4.3.2 Faults
01: Bus Start Fail
The internal converter failed, so the DC
bus voltage could not be boosted
correctly.
Contact the factory for repair
02: Bus Over
1) The mains input or load transient
current cause the DC bus voltage
to be too high;
2) The internal converter failed.
1) Shutdown and restart the system to see if it
happens again;
2) Contact the factory for repair.
03: Bus Under
The internal converter failed, so the DC
bus voltage is too low.
Contact the factory for repair.
04: Bus Unbalance
1) The load is special or abnormal, so
the internal positive and negative
DC bus voltages are unbalanced;
2) The internal converter failed.
Contact the factory.
11: Inv Start Fail
The internal inverter failed, so the
inverter voltage could not start up
correctly.
Contact the factory for repair.
12: Inv Volt High
The internal inverter failed, so the
inverter voltage is too high.
Contact the factory for repair.
13: Inv Volt Low
The internal inverter failed, so the
inverter voltage is too low.
Contact the factory for repair.
14: Output Short
Short circuit occurred on the UPS
output.
Remove the short circuit.
1A: NegPower
UPS output power is negative. It
means there is energy feedback into
the internal of UPS from output. It may
be caused by regenerative load; or
caused by the current control failure in
the parallel system.
Contact the factory.
21: Batt SCR Short
The internal battery SCR is failed and
short.
Contact the factory for repair.
24: Inv Rly Short
The internal inverter relay is stuck ON
or the SCR of STS (Static Transfer
Switch) is shorted.
Contact the factory for repair.
35: Para Comm
Fail
Parallel cable for communication is not
connected properly in the parallel
system.
Connect the parallel cable properly.
36: OP.I
Unbalance
The output current is extremely
unbalanced between the paralleled
UPSs; there is some error in the
parallel system.
Contact the factory for repair.
41: Over Temp
The internal temperature is too high
and reached the fault level (shutdown):
1) Environment is hot;
2) Fan is blocked or failed;
3) Ventilation is blocked by the wall or
other goods;
4) Load is too heavy.
1) Make sure the ambient temperature not over
40ºC;
2) Make sure the fan is OK;
3) Make sure the ventilation is OK;
4) Remove some loads if possible.
42: CPU Comm
Fail
Internal communication between the
CPUs failed
Contact the factory for repair.
43: Over load
Overload time is out of the specification
and the UPS shut down automatically.
Remove excess loads from UPS output and restart
it.
