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If the UPS system does not operate correctly, please solve the problem by using the table
below.
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 2 seconds.
EPO function is activated.
Set the circuit in closed
position to disable EPO
function.
The icon and flashing
on LCD display and alarm is
sounding every 2 seconds.
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 2 seconds.
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.
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.
The icon and is
flashing on LCD display and
alarm is sounding every second.
Remove excess loads from
UPS output.
UPS is overloaded.
Devices connected to the
UPS are fed directly by
the electrical network via
the Bypass.
Remove excess loads from
UPS output.
After repetitive overloads,
the UPS is locked in the
Bypass mode. Connected
devices are fed directly by
the mains.
Remove excess loads from
UPS output first. Then
shut down the UPS and
restart it.
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.
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