Tennant T290 Manuel D'instructions page 39

At the end of charging with the
electronic battery charger, the
battery does not provide the
correct voltage (about 2.14 V
per element without load) and
only one or a few elements are
found to be discharged when
tested with a hydrometer
The electrolyte in the battery is
turbid
The water/detergent drain hose
does not show the level of the
solution in the tank during the
filling operation.
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• the battery charger has not
been installed correctly
• the battery charger is not
working
• one or more elements are
damaged
• The battery has reached the
end of the charging/discharging
cycles declared
manufacturer
• the battery has been recharged
with too high a current
• the battery has been charged
beyond the limit suggested by
the Manufacturer
• Tap on water/detergent drain
hose closed
• Cap on water/detergent drain
hose not unscrewed
• taking the actual voltage
available at the socket into
account, make sure that the
connections of the primary of
the transformer inside the
battery charger are correct
(consult the battery charger
manual)
• make sure there is voltage
to the battery charger, that
the fuses are not blown and
that the current reaches the
battery; try charging with
another rectifier. If the battery
charger
contact the technical service
centre and indicate the serial
number
charger
• replace
elements if possible.
For 6 or 12 V single block
batteries, replace the entire
battery
• replace the battery
by the
• replace the battery
• replace the battery
• Remove the cap and open
the tap
• Remove the cap and open
the tap
is not working,
of the battery
the damaged