Tennant T290 Manuel D'instructions page 40

problem persists check the current consumption of the traction motor and check if any mechanical blockage
on it .
Hom [Hon] : MOSFET thermal sensor
It appears when the thermal sensor inside the traction MOSFET is being activated. Wait 15 min until the card
cool down and try again.
If it not disappear is necessary to replace the circuit board.
Hot : Overheating
Traction motor internal temperature sensor is engaged. Wait 30 minutes till the temperature decrease and try
again , or check the wiring between motor and card . If unsolved replace the sensor, it is located beside the
carbon brushes.
MoS [noS]: MOSFET
- The coil of the main contactor is open or in short circuit and the brush or traction function are
activated,
- The traction MOSFET is broken or in short circuit : the traction is blocked.
- The vacuum motor's relay has the coil in short circuit , replace it .
- Check the coil of the black traction motor relay positioned underneath the chassis.
- If the problem is still unsolved replace the traction card or the main contactor..
MoF [NoF]: Mosfet
The traction MOSFET is broken internally ; the traction is blocked , brush and vacuum still works.
Replace the traction board.
bLt : drive blocked
The battery voltage is too low: the traction and all other functions are blocked . Charge the batteries, replace
them if necessary.
AcS : Brush command problem
The brush motor's contactor is not engaged properly:
Push the brush switch and if the error is still on the display, check the connection between panel board and
brush contactor. If the connections are ok, replace the contactor located on PCB underneath the recovery
tank.
AcA : Vacuum motor command problem
The vacuum relay is not properly activated by the panel board,
Push the vacuum function switch and if the error is still on the display, check the relay connections. If the
connections are ok, replace the vacuum motor relay located on PCB underneath the recovery tank.
ACH : Solution solenoid valve problem
It appear is the fuse of solenoid valve is blown , or if the coil of the valve is interrupted internally or the wiring
between PCB and solenoid valve is interrupted . Check and replace parts if necessary
FuP : Fuse
- The coil of the main contactor does not close properly and the other functions are activated.
-
Internal problem on the display card , or incorrect contact between display card and Battery negative
.
cable
CLH : Clock
Internal problem in the display card main memory . Replace the display board
err : Error
It appears when there is a general malfunctioning error in the electronic board . Replace the display board .
.
ENGLISH
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