INDICATION DIAGNOSTIC SOLUTION
Fault LED
Check the error code on
the display
(see error code table)
Er05, Er39
intermittent sound
alarm
The batteries don’t work properly.
Check for proper battery connection
and measure battery voltage to ensure
that the batteries are charged.
Recharge the batteries for 8 hours if
necessary.
If the problem persists or if it is
necessary to replace them, contact the
LEGRAND Technical Support Service.
Er12
continuous alarm sound
Disconnect some non-critical loads
from the UPS output until the overload
ceases.
Check if there is any short-circuit between
the output cables due to a faulty
insulation. Replace the cables if necessary.
Er11, Er14
intermittent sound
alarm
Verify that the ventilating fans work
properly.
If the problem persists or if it necessary
to replace them, contact the LEGRAND
Technical Support Service.
Er 24
When the UPS is in CVCF mode, it is not
possible to have the bypass line. This
operating mode is available only on the
model 3 101 77.
other error codes
Check the error code table.
If the problem persists, contact the
LEGRAND Technical Support Service.
The UPS doesn’t work
in stored energy mode
or the backup time is
shorter than its intended
performance.
-
If the backup time remains
unsatisfactory after 8 hours of battery
charging, contact the LEGRAND
Technical Support Service.
The UPS is working
normally but the loads are
not powered
-
Check that the output cables are
properly connected and the external
output breaker is turned on.
If the problem persists, contact the
LEGRAND Technical Support Service.
5 Troubleshooting
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