Troubleshooting - LEGRAND Megaline Rack Mode D'emploi Pour L'utilisateur

6. Troubleshooting

Problems
When the UPS is switched on, the buzzer sounds
and the red warning light makes alternating
short-long flashes, then the UPS switches
off after 15 seconds
The UPS works but a short beep is heard every
12 seconds and the yellow warning light is lit
without flashing.
The UPS works but it beeps intermittently
and the red warning light and the yellow warning
light are flashing.
The UPS beeps continuously
and the yellow warning light flashes for about
15 seconds, after which the UPS switches off
The UPS works but the green warning light
is flashing quickly.
The UPS beeps intermittently and the red warning
light is flashing quickly.
Solutions
The connection of the neutral conductor is wrong:
invert the power supply plug,
or invert the connections of the neutral and phase input
leads, or exclude the neutral sensor.
- Check power is present at the mains outlet.
- Check that the UPS power supply cable is correctly
inserted in both the mains outlet and in the connector
on the UPS itself.
- Check the fuse located at the side of the input/output
connector under the plastic housing (refer to fig.1 or 4)
There is an overload on the UPS output.
Reduce the quantity of appliances connected so that the
load does not exceed the maximum power that the UPS
can supply.
Alternatively, if the UPS is not in its maximum configuration,
you can ask your Service Centre to increase the power of
your UPS by fitting extra power boards and relative batteries
inside the UPS cabinet.
The UPS has completely flattened its batteries; it can only
start up again when the mains input line is present.
Check the magneto-thermal or differential switches
that precede the UPS and the input fuse
The mains supply is out of the limits permitted for the
voltage and/or frequency, but it can still be used by the UPS.
However, the by-pass function is not operational
The thermal protection has been tripped.
Switch the UPS off and wait for a few minutes so that the
internal temperature of the UPS can get back to normal.
Check that the fans operate correctly and that the relative
airflow is not obstructed (e.g. if the UPS is too close to a wall).
There is a fault on one of the internal circuits.
Contact your service centre.
Megaline Rack
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