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PROBLEM
POSSIBLE CAUSE
SOLUTION
THE DISPLAY SHOWS
THE FOLLOWING CODE:
A39
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, L34
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) if present,
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) if present,
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.
Activate the maintenance bypass (SWMB) if present,
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
THE FOLLOWING CODE:
L11
STATIC BYPASS RUPTURE
OR FAULT
Activate the maintenance bypass (SWMB) if present.
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
NOTHING OR PROVIDES
INCORRECT
INFORMATION
THE DISPLAY HAS POWER
SUPPLY PROBLEMS
Activate the maintenance bypass (SWMB), shut down
the UPS completely and wait for a few seconds. Turn ON
the UPS 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
FAULT IN THE AUXILIARY
POWER SUPPLIES.
THE UPS IS IN BYPASS
SUPPORTED BY THE
REDUNANT POWER SUPPLY.
Activate the maintenance bypass (SWMB) if present.
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.
ATTENTION:
The UPS in case of a permanent failure will be not able to supply the load. To ensure total protection of your
equipment we suggest you install an ATS device (Automatic Transfer Switch) or an external automatic by-
pass. For more information visit
www.riello-ups.com
