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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
AC input power is not
Connected well.
Check if input power cord firmly
connected to the mains.
No indication and alarm even
the main is normal.
AC input is connected to the UPS
output.
Plug AC input power cord to AC
input correctly.
The icon
and
flashing on LCD display
and alarm is sounding every
second.
External or internal battery is
incorrectly connected.
Check if all batteries are
connected well.
Fault code is shown as 27 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
alarm is continuously
sounding.
Battery voltage is too low or the
charger is fault.
Contact your dealer.
UPS 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 then restart it.
Fault code is shown as 43 and
The icon
is lighting on
LCD display and alarm is
continuously sounding.
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
the icon
is lighting on
LCD display and alarm is
continuously sounding.
UPS shut down automatically
because of short circuit occurs on
the UPS output.
Check output wiring and if the
connected devices are in short
circuit status.
Fault code are shown on the
LCD display as 01, 02, 03, 04,
11, 12, 13, 41 with alarm
sounding continuously.
UPS internal fault occurred.
Two possible results below,
1. The load is still supplied, but
directly from AC power via
bypass.
2. The load is no longer
supplied by power.
Contact with your dealer
Batteries are not fully charged
Charge the batteries for 5 hours
at least then check capacity. If
the problem still existed, consult
with your dealer.
Battery backup time is shorter
than nominal value
Batteries defect
Contact with your dealer to
replace the battery.
Fault code is shown as 05 on
LCD display. At the same time,
alarm is continuously sounding
and output is cut off
UPS internal fault occurred
and BUS is short circuit.
UPS internal fault has
Consult with dealer.
If UPS power on again before
repair, the DC/DC mosfet will
damage.
