67
T380AMR 9020999 (08-2020)
MAINTENANCE
CHARGING THE BATTERIES
The charging instructions in this manual are
intended for the battery charger supplied with the
machine. The use of other battery chargers that
are not supplied and approved by Tennant are
prohibited. Refer to the charger owners manual
for additional information. Contact distributor or
Tennant for battery charger recommendations.
FOR SAFETY: The use of incompatible battery
chargers may damage battery packs and
potentially cause a
fi
re hazard.
IMPORTANT NOTICE:
The battery charger is
set to charge the battery type supplied with the
machine.
1. Ensure recovery tank is empty.
2. Drive the machine to a well-ventilated area.
3. Park the machine on a
fl
at, dry surface, turn off
machine and remove key.
4. Open the recovery tank and prop the tank
open to the level allowed by room available to
raise the recovery tank/seat.
WARNING: Batteries emit hydrogen
gas. Explosion or
fi
re can result. Keep
sparks and open
fl
ame away. Keep
covers open when charging.
FOR SAFETY: Before leaving or servicing
machine, stop on level surface, turn off
machine, and remove key.
5. Check the battery electrolyte level weekly
before charging. For models equipped with
the automatic battery watering system, check
electrolyte the level indicators located on the
battery covers. Add distilled water as needed.
6. Set the recovery tank to either level to allow
adequate ventilation for the charging the
batteries.
7. Connect the charger DC cord into the
machine battery charge receptacle then plug
the AC power supply cord into a properly
grounded wall outlet. Refer to the off-board
battery charger owners manual for operating
instructions.
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.
8. 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.
NOTE:
Do Not
disconnect battery cables while
charger is plugged in, circuit board damage may
result.
9. After charging batteries unplug the AC
power supply cord from the outlet before
disconnecting the charger from the machine.
10. Disconnect the battery charger from the
machine.
11. Lift the recovery tank, reposition the prop
bracket back into the storage position inside
the battery compartment or disengage
the recovery tank prop arm, and lower the
recovery tank.
