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LA-ITR-LCD
16
4. Troubleshooting
If the UPS system does not operate correctly, please solve the problem by using the table
below.
Symptom
Possible cause
Remedy
No indication and alarm even
though the mains is normal.
The AC input power is not
connected well.
Check if input power cord
firmly connected to the
mains.
The AC input is connected
to the UPS output.
Plug AC input power cord
to AC input correctly.
The icon
and the warning
code
flashing on LCD
display and alarm is sounding
every second.
EPO function is activated.
Set the circuit in close
position to disable EPO
function.
The icon
and
flashing
on LCD display and alarm is
sounding every second.
Line and neutral
conductors of UPS input
are reversed.
Rotate
mains
power
socket by 180° and then
connect to UPS system.
The icon
and
flashing
on LCD display and alarm is
sounding every second.
The external or internal
battery is incorrectly
connected.
Check if all batteries are
connected well.
Fault code is shown as 27, and
the icon
is lighting on LCD
display and alarm is continuously
sounding.
Battery voltage is too high
or the charger is fault.
Contact your dealer.
Fault code is shown as 28, and
the icon
is lighting on LCD
display and alarm is continuously
sounding.
Battery voltage is too low
or the charger is fault.
Contact your dealer.
The icon
and the icon
are flashing on LCD
display and alarm is sounding
twice every second.
UPS is overload
Remove
excess
loads
from UPS output.
Fault code is shown as 43, and
the icon
is lighting on
LCD display and alarm is
continuously sounding.
The UPS shut down
automatically because of
overload at the UPS
output.
Remove
excess
loads
from UPS output and
restart it.
Fault code is shown as 14 and
alarm is continuously sounding.
The UPS shut down
automatically because
short circuit occurs on the
UPS output.
Check output wiring and if
connected devices are in
short circuit status.
