Tennant T391 Manuel D'instructions page 25

Alarm Possible cause
BRUSHES THERMAL The brush
PROTECTION overheated.
Faulty
contact on the motors.
Faulty connection.
DRIVE THERMAL The drive
PROTECTION overheated.
Faulty
contact on the motor.
Faulty connection.
WATER RESERVE Solution tank almost empty.
Stuck sensor.
Faulty sensor or connection.
NO WATER Solution tank empty.
Stuck sensor.
Faulty sensor or connection.
DIRTY WATER TANK Dirty water tank full.
Stuck sensor.
Faulty sensor or connection.
CHEMICAL FINISHED Severe
empty.
Stuck sensor.
Faulty sensor or connection.
FUNCTION BOARD NOT Communication
DETECTED functions board interrupted.
Faulty auxiliary boards.
BATTERY RESERVE Battery voltage less than
: 21.9 V GEL/AGM - 21 V
ACID.
Flat batteries.
CALL SERVICE The set number of hours for
scheduled service have been
reached/exceeded.
BATTERY CHARGING The
charger is operating, all the
machine's
disabled.
CHARGING COMPLETE The on-board battery charger
is operating, the charge is
complete, all the machine's
functions are disabled.
O.C. BRUSHES
Faulty functions board.
Brush motor faulty
DRIVE BOARD
TEMPERATURE Faulty drive board.
Electric brake engaged.
ACCELERATOR FAULT Faulty
connections.
Faulty potentiometer.
DRIVE BOARD U.V. Battery voltage less than
18.3 V GEL/AGM - 18 V
ACID.
Flat or degraded batteries.
RELAY FAULT Faulty relay.
Faulty relay connection.
ELECTRIC BRAKE FAULT Faulty wiring.
Faulty electric brake.
The electric brake has been
enabled in the Technical
machine.
HDP Drive lever pressed when
starting.
Drive lever potentiometer not
adjusted.
DISPLAY ALARMS
What to do
motor has Wait for the brush motors to
cool down.
thermal protector Replace the brush motor.
Check the connection.
wheel has Wait for the drive wheel to
cool down.
thermal protector Replace the drive wheel.
Check the connection.
Fill the solution tank.
Clean the level sensor.
Replace the level sensor.
Check the connection.
Fill the solution tank.
Clean the level sensor.
Replace the level sensor.
Check the connection.
To resume work, turn the
operation selector to the OFF
position (reset errors).
Empty the dirty water tank.
Clean the level sensor.
Replace the level sensor.
Check the connection.
To resume work, turn the
operation selector to the OFF
position (reset errors).
Environment tank Fill the Severe Environment
tank.
Clean the level sensor.
Replace the level sensor.
Check the connection.
with Check the
between the boards.
Check the auxiliary boards.
Recharge the batteries.
Replace the batteries.
Call a service centre to
arrange servicing.
on-board battery Disconnect the
charger.
functions are
Disconnect the
charger.
Check motor load.
Replace functions board.
Replace the brush motor.
Cool or heat the board.
Do not overwork the machine
on long ramps.
Replace the drive control
board.
Check the electric brake.
potentiometer Check the connection.
Replace the potentiometer.
Charge or replace
batteries.
Replace the relay.
Check relay connections.
Check the wiring.
Check / replace the electric
brake.
Correct the settings in the
Technical Menu.
Release the drive lever when
starting the machine.
Check potentiometer
adjustment.
BATTERY FLAT
TAG FAULT
RFID FAULT
SUCTION TEMPERATURE
BRUSH TEMPERATURE
SUCTION O.C.
DRIVE O.C.
UPDATE FW
FLASHING LIGHT FAULT
connection
SOLENOID VALVE FAULT
PUMP FAULT
BRUSHES FUSE
battery
SUCTION FUSE
battery
RECHARGE ERROR
the
EN
Battery voltage less than Recharge the batteries.
21.4 V - GEL / 20.5 V - ACID. Replace the batteries.
Flat or degraded batteries.
Faulty key. Replace the key.
Faulty instrument panel Replace
antenna board panel antenna board-reed.
Check the wiring.
Faulty key. Replace the key.
Faulty instrument panel Replace
antenna board panel antenna board-reed.
Check the wiring.
Check the suction motor.
Faulty functions board. Replace functions board.
Faulty suction motor. Replace the suction motor.
Check the motor.
Faulty functions board. Replace functions board.
Faulty motor. Replace the motor.
Check the suction motor.
Faulty functions board. Replace functions board.
Faulty suction motor. Replace the suction motor.
Check the motor.
Faulty drive board. Replace the drive board.
Electric brake engaged. Check the electric brake.
Software update. Do not remove the key
during the update.
Faulty wiring. Check the wiring.
Correct the settings in the
enabled in the Technical Technical Menu.
machine.
Faulty wiring. Check the wiring.
Faulty solenoid valve. Check the solenoid valve.
Solenoid valve broken. Replace the solenoid valve.
Faulty wiring. Check the wiring.
Faulty pump. Check the pump.
The pump is broken. Replace the pump.
The pump has been enabled Correct the settings in the
in the Technical menu but it Technical Menu.
Check the motor.
Faulty brush motor contactor. Replace the contactor.
Motor fuse blown. Replace the fuse.
Check the motor.
Faulty brush motor relay. Replace the relay.
Motor fuse blown. Replace the fuse.
Generic error associated Disconnect the battery
with the battery recharging charger and repeat the
operation. recharge procedure.
If the problem persists,
replace the battery charger.
the instrument
the instrument
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