PROBLEM
POSSIBLE CAUSE
SOLUTION
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
A39, A40
AND THE RED
“REPLACE BATTERIES”
LED IS ON
THE BATTERIES HAVE
FAILED THE PERIODIC
EFFICIENCY TEST
It is recommended to replace the batteries of the UPS,
since they ate no longer able to maintain the charge for
a sufficient autonomy.
Warning: The replacement of the batteries must be
carried out by qualified personnel.
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
F34, F35, F36, L34, L35,
L36
AMBIENT TEMPERATURE
HIGHER THAN 40°C
HEAT SOURCES CLOSE
TO THE UPS
VENTILATION SLITS
OBSTRUCTED OR TOO
CLOSE TO THE WALLS
Activate the maintenance bypass (SWMB) without
switching off the UPS. This way, the fans will cool the
heat sink more rapidly. 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
switching off the UPS, so that the fans, while keeping
running, cool the heat sink more rapidly and wait for the
temperature of the heat sink to drop. Turn the UPS off
and back on again. Exclude the maintenance bypass
and if the problem persists, contact the nearest service
centre.
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
F37, L37
AMBIENT TEMPERATURE
HIGHER THAN 40°C
HEAT SOURCES CLOSE
TO THE UPS
VENTILATION SLITS
OBSTRUCTED OR TOO
CLOSE TO THE WALLS
FAULT IN THE
TEMPERATURE PROBE
OR IN THE 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 persists,
contact the nearest service centre. WARNING: never
open the SWBATT fuse holders during battery
operation.
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
L11, L12, L13
STATIC BYPASS
RUPTURE OR FAULT
Activate the maintenance bypass (SWMB). Switch off
the UPS, wait for a minute and turn the UPS back on.
Exclude the maintenance bypass and if the problem
persists, contact the nearest service centre.
THE DISPLAY SHOWS
NOTHING OR PROVIDES
INCORRECT
INFORMATION
THE DISPLAY HAS POWER
SUPPLY PROBLEMS
Activate the maintenance bypass (SWMB) without
opening the INPUT/OUTPUT isolators.
Switch off the UPS, wait for a minute and turn the UPS
back on. Exclude the maintenance bypass and if the
problem persists, contact the nearest service centre.
THE DISPLAY IS OFF,
THE FANS ARE OFF BUT
THE LOAD IS POWERED
FAULT IN THE AUXILIARY
POWER SUPPLIES.
THE UPS IS IN BYPASS
SUPPORTED BY THE
REDUNANT POWER SUPPLY.
Activate the maintenance bypass (SWMB). Switch off
the UPS, wait for a minute and turn the UPS back on. If
the display does not turn on or if the sequence fails,
contact the nearest service centre, leaving the UPS in
manual bypass mode.
