31
TROUBLESHOOTING
An irregular operation of the UPS is frequently not due to malfunctions, but to simple problems, inconveniences or distractions.
Therefore, the user is advised to consult the table below providing useful information on how to solve the most common
problems.
WARNING:
the table below often refers to the use of the maintenance BYPASS (SWMB). If the device is installed,
before restoring the correct operation of the UPS, make sure that it is switched on and
not in STAND-BY
.
NOTE: For the exact meaning of the codes mentioned in the table, please read the
“S
TATUS
/
A
LARM CODES
”
section.
PROBLEM
POSSIBLE CAUSE
SOLUTION
THE UPS CONNECTED
TO THE MAINS, DOES
NOT SWITCH TO STAND
BY MODE
(THE DISPLAY DOES
NOT LIGHT UP)
CONNECTION TO THE INPUT
TERMINAL MISSING
Connect the mains to the terminals following the
indications in the paragraph
“P
OWER
C
ONNECTION
”
NEUTRAL CONNECTION
MISSING
The UPS cannot function without the neutral connection.
WARNING: the absence of this connection can damage
the UPS and/or the load. Connect the mains to the
terminals as explained in the paragraph
“P
OWER
C
ONNECTION
”
.
THE ISOLATOR (SWIN) IS
OPEN
Close the isolator
MAINS POWER MISSING
(BLACKOUT)
Make sure the mains power is present. If necessary,
perform battery start-up to power the load.
INTERVENTION OF THE
UPSTREAM PROTECTION
DEVICE
Restore the protection. Warning: make sure there is no
overload or short circuit on the UPS output.
NO POWER REACHES
THE LOAD
CONNECTION TO THE
OUTPUT TERMINAL MISSING
Connect the load to the terminals
THE UPS IS IN STAND-BY
MODE
Run the start-up sequence
THE STAND-BY OFF MODE
HAS BEEN SELECTED
The operating mode must be changed. In fact, the
STAND-BY OFF (emergency) mode only powers the
loads when a black out occurs.
MALFUNCTION OF THE UPS
AND AUTOMATIC BYPASS
OUT OF USE
Insert the maintenance bypass (SWMB) and contact
the nearest service centre
THE UPS OPERATES
OFF THE BATTERIES
EVEN THOUGH MAINS
POWER IS PRESENT
INTERVENTION OF THE
UPSTREAM PROTECTION
DEVICE
Restore the protection.
WARNING: make sure there is no overload or short
circuit on the UPS output.
THE INPUT VOLTAGE IS OUT
OF THE ALLOWED
OPERATING VALUES FOR
MAINS POWER
Problem caused by the mains power. Wait for the input
mains voltage to return within the tolerance limits. The
UPS will return automatically to mains operation.
