TROUBLESHOOTING
Irregular UPS operation is most likely not an indication of a fault but due to simple problems or distraction.
It is therefore advisable to consult the table below carefully as it summarises information which is useful for solving the most
common problems.
ATTENTION:
the table below often cites use of MANUAL BYPASS. Please remember that, before resetting proper
UPS operation, it is necessary to verify that the UPS is
not in STAND-BY
.
If it is, switch on the UPS by accessing the "SYSTEM ON" menu and wait for the start-up sequence to be completed
before removing manual bypass.
For further information,
carefully read the sequence described in paragraph
“Manual bypass (SWMB
)”.
NOTE: For the exact meaning of the codes mentioned in the table, refer to paragraph "ALARM CODES"
PROBLEM
POSSIBLE CAUSE
SOLUTION
IN THE PRESENCE OF
MAINS POWER, THE UPS
DOES NOT GO INTO
STAND-BY
(THE RED LOCK/STAND-
BY LED DOES NOT
FLASH, NO BEEP IS
EMITTED AND THE
DISPLAY DOES NOT
SWITCH ON)
NO CONNECTION TO INPUT
TERMINALS
Connect the mains to the terminals as indicated in the
Installation paragraph
NO CONNECTION TO THE
NEUTRAL
The UPS cannot operate without neutral connection.
ATTENTION: Failure to make this connection can
damage the UPS and/or the load.
Connect the mains to the terminals as indicated in the
Installation paragraph.
THE SWITCH BEHIND THE
DOOR (SWIN) IS OPEN
Close the switch.
NO MAINS VOLTAGE
(BLACKOUT)
Verify electrical main voltage presence. If necessary,
switch on via batteries to power the load.
UPSTREAM PROTECTION
INTERVENTION
Reset protection. Attention: check that there is no output
overload or short to the UPS.
NO LOAD VOLTAGE
ARRIVING
NO CONNECTION TO OUTPUT
TERMINALS
Connect load to terminals
THE SWITCH BEHIND THE
DOOR (SWOUT) IS OPEN
Close the switch.
THE UPS IS IN STAND-BY
MODE
Perform start-up sequence
STAND-BY OFF MODE IS
SELECTED
It is necessary to change mode. In reality, the STAND-
BY OFF (emergency power supply) mode only powers
loads in the event of a blackout.
UPS MALFUNCTION AND
AUTOMATIC BYPASS NOT
WORKING
Insert manual bypass (SWMB) and contact the nearest
service centre
THE UPS IS OPERATING
FROM THE BATTERY
DESPITE THE
PRESENCE OF MAINS
VOLTAGE
UPSTREAM PROTECTION
INTERVENTION
Reset protection.
ATTENTION: Check that there is no output overload or
short to the UPS.
THE INPUT VOLTAGE IS
OUTSIDE THE PERMITTED
TOLERANCE RANGE FOR
MAINS OPERATION
Problem with the mains. Wait until the input mains
voltage returns within the tolerance range. The UPS will
automatically return to mains operation.
