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6. Trouble Shooting
If the UPS system does not operate correctly, first check the operating
information on the LCD display.
Please attempt to solve the problem using the table below. If the problem still
persists, consult NEXT UPS Systems.
Problem
Possible cause
Remedy
No indication, no
warning tone even
though system is
connected to mains
power supply
No input voltage
Check building wiring socket
outlet and input cable.
Emergency supply
period shorter than
nominal value
Batteries not fully
charged / batteries
defect
Charge the batteries for at least
5 - 8 hours and then check
capacity. If the problem still
persists, consult your dealer.
Fan fail
Alarm Code: 84
Fan abnormal
Check if the fan is running
Battery over voltage
Alarm Code:16
Battery is over
charged
Stop charging to battery
automatically, and after the
battery voltage is normal and
the mains is normal, charge
automatically again.
Battery low
Alarm Code:12
Battery voltage is
low
When audible alarm sounding
every second, battery is almost
empty.
Charge fail
Alarm Code:15
The charge is
broken
Notify dealer.
Inverter temperature
high
Alarm Code:86
Inside
temperature of the
UPS is too high
Check the ventilation of the
UPS, check the ambient
temperature.
Ambient temperature
high
Alarm Code:82
The ambient
temperature is too
high
Check the environment
ventilation.
Battery open
Alarm Code:11
Battery pack is not
connected
correctly
Check the battery bank is
connected to the UPS.
Check the battery breaker is
turn on.
Service Battery
Alarm Code:13
Battery may need
to be replaced
Consult dealer
Overload
Alarm Code: 41/42/43
Overload
Check the loads and remove
some non-critical loads.
Check whether some loads are
failed.
Site fail
Phase and neutral
Rotate mains power socket by
