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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.
