Troubleshooting - Mecer ME-1000-WTU User Manual

4. Troubleshooting

If the UPS system does not operate correctly, please solve the problem by using the table below.
Symptom
No indication and alarm even
though the mains is normal.
The icon and
LCD display and alarm is sounding
every second.
Fault code is shown as 27 and the
icon is lighting on LCD
display and alarm is continuously
sounding.
Fault code is shown as 28 and the
icon is lighting on LCD
display and alarm is continuously
sounding.
The icon and
flashing on LCD display and alarm
is sounding twice every second.
Fault code is shown as 43 and The
icon is lighting on LCD
display and alarm is continuously
sounding.
Fault code is shown as 14 and the
icon is lighting on LCD
display and alarm is continuously
sounding.
Fault code is shown as 01, 02, 03,
04, 05, 11, 12, 13 and 41 on LCD
display and alarm is continuously
sounding.
Possible cause
The AC input power is not
connected well.
The AC input is connected
to the UPS output.
The external or internal
flashing on
battery is incorrectly
connected.
Battery voltage is too high
or the charger is fault.
Battery voltage is too low
or the charger is fault.
UPS is overload
is
UPS is overloaded. Devices
connected to the UPS are
fed directly by the electrical
network via the Bypass.
After repetitive overloads,
the UPS is locked in the
Bypass mode. Connected
devices are fed directly by
the mains.
The UPS shut down
automatically because of
overload at the UPS output.
The UPS shut down
automatically because
short circuit occurs on the
UPS output.
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.
12
Remedy
Check if input power cord
firmly connected to the
mains.
Plug AC input power cord to
AC input correctly.
Check if all batteries are
connected well.
Contact your dealer.
Contact your dealer.
Remove excess loads from
UPS output.
Remove excess loads from
UPS output.
Remove excess loads from
UPS output first. Then shut
down the UPS and restart
it.
Remove excess loads from
UPS output and restart it.
Check output wiring and if
connected devices are in
short circuit status.
Contact your dealer