Sy-G Contender 1 KVA, User Manual

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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 are 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 , 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 , LCD display and
alarm is continuously sounding.
Battery voltage is too low
or the charger is fault.
Contact your dealer.
The icon and is
flashing on LCD display and
alarm is sounding every second.
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.
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. Alarm is continuously
The UPS shut down
automatically because of
overload
at the UPS
Remove excess loads from
UPS output and restart it.