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4. Troubleshooting
If the UPS system does not operate correctly, use the table below to check problem.
Symptom
Possible cause
Remedy
No indication and alarm even though
the main is normal.
The AC input power is not
connected properly.
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
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 properly.
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 at fault.
Contact the manufacturer.
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 the manufacturer.
The icon
and
is flashing on
LCD display and alarm is sounding
twice every second.
UPS is overloaded
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.
Fault code is shown as 14 and the
icon
is lighting on LCD display.
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, 02, 03, 04,
11, 12, 13 and 41 on LCD display and
alarm is continuously sounding.
A UPS internal fault has
occurred. There are two
possible results:
1. The load is still supplied,
but directly from AC power via
bypass.
2. The load is no longer
supplied by power.
Contact the manufacturer
