42
UPS temp. alarm
Inside temperature of UPS is too
high
Check the ventilation of UPS and the
ambient temperature.
Amb. temp. alarm
The ambient temperature is too
high
Check the environment ventilation
Imminent shutoff
Insufficient battery backup time
Protect load equipment in time
FAULT
Problem Displayed
Possible cause
Remedy
Inverter overload
Overload
Check the loads and remove some
noncritical loads.
Check if some loads are failed.
Bypass overload
Overload
Check the loads and remove some
noncritical loads.
Check if some loads are failed.
Out. 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.
UPS temp. fault
Inside temperature of UPS is too
high
Check the ventilation of UPS and the
ambient temperature.
DC bus + or - too high
UPS internal fault, the + or -DC
BUS voltage is too high
Consult dealer.
DC bus + or - too low
UPS internal fault, the + or -DC
BUS voltage is too low
Consult dealer.
DC bus unbalanced
UPS internal fault, the voltage
difference between DC Bus+ and
DC bus- is too large
Consult dealer.
DC bus short circ.
UPS internal fault
Consult dealer.
Max inverter volt
UPS internal fault, the inverter
voltage is too high
Consult dealer.
Min inverter volt
UPS internal fault, the inverter
voltage is too low
Consult dealer.
ELSE CASES
Problem Displayed
Possible cause
Remedy
No indication, no
warning tone even
though system is
connected to mains
power supply
No input voltage
Check the building wiring and input
cable.
Check if the input breaker is closed.
Green LED is not on
even though the
power supply is
available
Inverter not switched on
Press On-Switch to turn on UPS.
Emergency supply
period shorter than
nominal value
Batteries are not fully charged /
batteries defect
Charge the batteries for at least 12
hours and then check capacity.
