43
Speed Scrub 350 9016424 (09-2017)
MAINTENANCE
CHARGING BATTERIES
The charging instructions in this manual are
intended for the battery charger supplied with your
machine. The use of other battery chargers that
are not supplied and approved by Tennant are
prohibited.
If your machine is equipped with an off-board
battery charger refer to the charger’s owners
manual for operating instructions. Contact
distributor or Tennant for battery charger
recommendations if machine is not equipped with
charger.
FOR SAFETY: Do not use incompatible battery
chargers as this may damage battery packs
and potentially cause a
fi
re.
IMPORTANT NOTICE: The battery charger
is set to charge the battery type supplied with
your machine. If you choose to change to a
different battery type or capacity (i.e.
fl
ooded
(wet) lead-acid, maintenance-free, sealed, AGM
batteries, etc.), the charger’s charging pro
fi
le
must be changed to prevent battery damage. See
BATTERY CHARGER SETTINGS.
1. Transport the machine to a well-ventilated
area.
WARNING: Batteries emit hydrogen
gas. Explosion or
fi
re can result. Keep
sparks and open
fl
ame away when
charging.
2. Park the machine on a
fl
at, dry surface, turn off
machine and remove key.
FOR SAFETY: When servicing batteries, stop
on level surface, turn off machine, and remove
key.
3. If the machine is equipped with
fl
ooded (wet)
lead acid batteries check the battery electrolyte
level weekly before charging. For models
equipped with the automatic battery watering
system, check if the automatic battery water
tank needs re
fi
lling. Add distilled water if low.
4. For models equipped with an on-board
charger, remove the charger’s power cord from
the storage hooks and plug power cord into a
properly grounded wall outlet.
FOR SAFETY: Open recovery tank if
temperature is above 80ºF/27ºC when charging
batteries.
For models equipped with off-board chargers,
fi
rst connect the charger’s DC cord into the
machine’s battery charge receptacle then
plug the AC power supply cord into a properly
grounded wall outlet. Refer to the off-board
battery charger’s owner manual for operating
instructions. Do not close the recovery tank on
the charger cables when charging with an off-
board charger.
FOR SAFETY: Do not disconnect the off-
board charger’s DC cord from the machine’s
receptacle when the charger is operating.
Arcing may result. If the charger must be
interrupted during charging, disconnect the AC
power supply cord
fi
rst.
5. The charger will automatically begin charging
and shut off when fully charged. The maximum
charging cycle may take up to 6-12 hours
depending on battery type.
On-board battery charger: The battery
discharge indicator lights will ripple back and
forth during the charging cycle. When all
fi
ve
lights repeatedly
fl
ash two times, the charging
cycle is complete.
ATTENTION: Do not disconnect battery cables
while charger is plugged in, circuit board
damage may result.
