PROBLEM
POSSIBLE CAUSE
SOLUTION
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
A39, A40
AND THE RED
“BATTERIES TO BE
REPLACED” LED IS ON
THE BATTERIES HAVE
FAILED THE PERIODIC
EFFICIENCY TEST
The batteries of the UPS should be replaced in that
they are no longer able to maintain the charge for a
sufficient time to ensure the required autonomy.
Warning: The batteries are to be replaced by
qualified staff
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
F34, F35, F36, L34, L35,
L36
AMBIENT TEMPERATURE
OVER 40°C
HEAT SOURCES CLOSE
TO THE UPS
VENTILATION SLITS
OBSTRUCTED OR TOO
CLOSE TO WALLS
Activate the maintenance bypass (SWMB) without
powering off the UPS; in this way, the fans cool the
heat sink more quickly. Eliminate the cause of the
overtemperature and wait for the temperature of the
heat sink to drop. Exclude the maintenance bypass.
FAULT IN TEMPERATURE
PROBE OR UPS COOLING
SYSTEM
Insert the maintenance bypass (SWMB) without turning
off the UPS so that the fans, continuing to run, cool the
heat sink more quickly and wait for the temperature of
the heat sink to drop. Turn the UPS off and then on
again. Exclude the maintenance bypass. If the problem
persists, call your local service centre
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
F37, L37
AMBIENT TEMPERATURE
IS OVER 40°C
HEAT SOURCES CLOSE
TO THE UPS
VENTILATION SLITS
OBSTRUCTED OR TOO
CLOSE TO WALLS
FAULT IN THE
TEMPERATURE PROBE
OR BATTERY CHARGER
COOLING SYSTEM
Eliminate the cause of the overtemperature.
Open the battery fuse holder isolators (SWBATT) and
wait for the temperature of the battery charger heat sink
to drop.
Close the battery fuse holders. If the problem recurs,
call your local service centre. WARNING: never open
the SWBATT fuse holders during battery operation.
THE DISPLAY SHOWS
THE CODES:
L11
BREAKDOWN OR
MALFUNCTIONING OF
THE STATIC BYPASS
Activate the maintenance bypass (SWMB), switch the
UPS off and then on again. Exclude the maintenance
bypass. If the fault persists, contact the nearest
technical support centre
THE DISPLAY SHOWS
NOTHING OR PROVIDES
INCORRECT
INFORMATION
THE DISPLAY HAS POWER
SUPPLY PROBLEMS
Close Manual Bypass (SWMB) keeping closed INPUT
and OUTPUT switches.
Open input switch (SWIN and SWBYP) and wait until
UPS is completely turned OFF.
Turn ON SWIN and SWBYP again and verify display
regular operation. Exclude the maintenance bypass. If
the fault persists, contact the nearest technical support
centre.
THE DISPLAY IS OFF,
THE FANS ARE OFF BUT
THE LOAD IS POWERED
DUE TO A FAULT IN THE
AUXILIARIES, 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 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.
