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TROUBLESHOOTING GUIDE
Irregular operation of the UPS is very often not an indication of a fault but is simply caused by simple problems or
distractions.
We therefore recommend you consult the table here below, which provides some information that will help you to
solve the most common problems.
WARNING:
Table 13 below frequently recommends the use of the maintenance BYPASS. We remind you
that before restoring the UPS to operation, you must make sure that it is on and
not in STAND-BY
.
If the UPS is in this latter mode, turn on the UPS by accessing the “SYSTEM OFF/ON” menu and wait for
the power-on sequence to be completed before removing the maintenance BYPASS.
For further details
read the procedures described in the maintenance BYPASS (SWMB
)
chapter.
NOTE:
For a detailed explanation of the codes listed in Table 13, see the “STATUS/ALARM CODES” chapter.
PROBLEM
POSSIBLE CAUSE
SOLUTION
THE UPS IS
COMPLETELY OFF
(THE DISPLAY IS NOT
TURNED ON)
MAINS VOLTAGE NOT
PRESENT (BLACKOUT)
Check that the mains voltage is present. If necessary,
power on the UPS from the battery to power the load.
NO CONNECTION WITH INPUT
TERMINALS
Connect the mains to the terminals as indicated in
the Installation manual.
INPUT ISOLATOR (SWIN) IS
OPEN
Close the input isolator (SWIN)
NO NEUTRAL CONNECTION
The UPS cannot work without a neutral connection.
WARNING: If this connection is missing, damage could
be caused to the UPS and/or the load.
Connect the mains to the terminals as indicated in the
Installation manual.
UPSTREAM PROTECTIVE
DEVICE OPEN
Reset the protective device. Warning: check that there
is no overload or short-circuit at the output of the UPS.
THE LOAD IS NOT
POWERED
NO CONNECTION WITH
OUTPUT TERMINALS
Connect the load to the terminals
OUTPUT ISOLATOR (SWOUT)
IS OPEN
Close the output isolator (SWOUT)
UPS IS IN STAND-BY
Execute the power-on sequence
STAND-BY OFF MODE IS
SELECTED
The operating mode must be changed. In fact, STAND-
BY OFF (emergency) mode only powers the loads
when a black out occurs.
UPS FAILURE AND
AUTOMATIC BYPASS OUT OF
ORDER
Insert the maintenance bypass (SWMB) and call your
local service centre
THE COMMUNICATION
IS LOST, THE FANS
ARE OFF BUT THE
LOAD IS POWERED
DUE TO AN AUXILIARY
SUPPLY FAULT, THE UPS IS
IN BYPASS SUPPORTED BY
THE REDUNDANT POWER
SUPPLY
Activate the maintenance bypass (SWMB) shut down the
UPS completely and wait for a few seconds. Try to
switch it on again.
If the display does not light up or the sequence fails,
contact the nearest technical support centre and
leave the UPS in
manual bypass mode.
THE UPS RUNS ON
BATTERY POWER
EVEN WHEN THE
MAINS VOLTAGE IS
PRESENT
UPSTREAM PROTECTIVE
DEVICE TRIPPED/BLOWN
FUSE
Reset the protective device or replace the blown fuses.
WARNING: Check that there is no overload or short
circuit at the output of the UPS.
INPUT VOLTAGE OUTSIDE
TOLERANCE LIMITS FOR
MAINS OPERATION
Verify the voltage measures in the “Mains Input page”.
Problem caused by the mains. Wait for the input mains
voltage to return within the tolerance limits. The UPS
will return automatically to mains operation.
