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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.
EPO displayed on LCD and alarm
is sounding.
EPO function is activated.
Set the circuit in close
position to disable EPO
function.
Load icon flashes
on LCD display and alarm is
sounding every second.
The external or internal
battery is incorrectly
connected.
Check if all batteries are
connected well.
Overload codes displayed on LCD
display and alarm is sounding
every second.
UPS is overload
Remove excess loads from
UPS output.
Fault code is shown as 43 and The
icon EQ33EQHis 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.
Fault code is shown as 01,03,
08,09 on LCD display and alarm is
continuously sounding.
A UPS internal fault has
occurred.
Contact your dealer
Battery backup time is shorter than
nominal value
Batteries are not fully
charged
Charge the batteries for at
least 5 hours and then check
capacity. If the problem still
persists, consult your dealer.
Batteries defect
Contact your dealer to
replace the battery.
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