19
4. Troubleshooting
If the UPS system does not operate correctly, please solve the problem by using the table below.
Symptom Possible
cause
Remedy
The AC input power is not
connected well.
Check if input power cord
firmly connected to the
mains.
No indication and alarm even
though the main is normal.
The AC input is connected
to the UPS output.
Plug AC input power cord to
AC input correctly.
The icon
is flashing and the
warning code
is lighting on
LCD display. Alarm is sounding
every second.
EPO function is activated. Set the circuit in closed
position to disable EPO
function.
The icon
is flashing and
is lighting on LCD display. 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.
UPS is overload
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.
The icon
and
is flashing
on LCD display and alarm is
sounding twice every second.
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.
