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 NOT
PASSED THE PERIODIC
EFFICIENCY CHECK
It is advisable to replace the batteries in the battery rack
as they are no longer able to maintain their charge for a
sufficient period of autonomy.
Caution: The batteries must only be replaced by
qualified personnel.
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
F34, L34, L35, L36
AMBIENT TEMPERATURE
GREATER THAN 40°C
HEAT SOURCES IN THE
PROXIMITY OF THE UPS
VENTILATION SLITS
BLOCKED OR TOO
CLOSE TO THE WALLS
Activate the maintenance bypass (SWMB) without
switching off the UPS; in this way, the fans cool the
heat sink more quickly. Remove the cause of the
overtemperature and wait until the heat sink
temperature decreases. Exclude the maintenance
bypass.
MALFUNCTIONING OF
THE TEMPERATURE
SENSOR OR THE UPS
COOLING SYSTEM
Activate the maintenance bypass (SWMB) without
switching off the UPS so that the fans cool the heat sink
more quickly by continuing to operate. Switch the UPS
off and back on again. Exclude the maintenance
bypass. If the problem persists, call the nearest
assistance centre.
THE DISPLAY SHOWS
ONE OR MORE OF THE
FOLLOWING CODES:
F37, L37
AMBIENT TEMPERATURE
GREATER THAN 40°C
HEAT SOURCES IN THE
PROXIMITY OF THE UPS
AIR SLITS BLOCKED OR
TOO CLOSE TO THE
WALLS
MALFUNCTIONING OF
THE TEMPERATURE
SENSOR OR THE
BATTERY CHARGER
COOLING SYSTEM
Remove the cause of the overtemperature.
Open the battery rack switch/fuse and wait until the
battery charger heat sink temperature decreases.
Close the battery fuse holder. If the problem occurs
again,
contact
the
nearest
assistance
centre.
CAUTION: never open the SWBATT fuse holders
during battery operation.
THE DISPLAY IS BLANK
OR GIVES INCORRECT
INFORMATION
THE DISPLAY HAS POWER
SUPPLY PROBLEMS
Activate the maintenance bypass (SWMB) without
opening the OUTPUT isolating switch.
Open the input isolating switch, wait for a few seconds
until the display is completely off and close SWIN
again.
Switch the UPS back on. Exclude the maintenance
bypass. If the problem persists, call the nearest
assistance centre.
THE DISPLAY AND THE
FANS ARE OFF BUT THE
LOAD IS POWERED
DUE TO MALFUNCTIONING
OF THE POWER SUPPLIES,
THE UPS IS IN BYPASS
MODE, SUPPORTED BY THE
REDUNDANT POWER SUPPLY
Activate the maintenance bypass (SWMB). Open the
input isolating switch, wait for a few seconds and close
SWIN again.
Try to switch the UPS on again.
If the display does not come back on or the sequence
fails, contact the nearest assistance centre, leaving the
UPS in manual bypass mode.
