56041474
SAFETY MICROSWITCH
It is activated when the machine bonnet is
lifted up, and it stops:
- all functions in the electric model
CENTRE BRUSH SAFETY DEVICE
The operator has to lift the bonnet to reach
the lid latch of the centre brush compartment.
When the bonnet is lifted the microswitch is
activated, stopping the centre brush.
If the safety functions are activated the
multifunction display on the control panel
will show the correspondent safety codes (as
shown in the chart bellow).
The machine has a hold up device for power
overload. If the battery - indicated on the
display - exceeds 28V, the machine stops.
SAFETY FUNCTIONS AND
TROUBLESHOOTING
19
SAFETY CODE-EVENT
MACHINE BEHAVIOUR
POSSIBLE INTERVENTION
NOTES
302:
TROUBLE ON THE ELECTRONIC
CONTROL OF THE DRIVE FUNCTION.
AUTOMATIC STOP OF THE
MACHINE.
BEFORE REPLACING THE POWER ELECTRONIC
BOARD:
1-CHECK THE CONTINUITY OF THE CONNECTION
CABLES BETWEEN THE POWER ELECTRONIC
BOARD AND THE DRIVE MOTOR
2-CHECK THE OPERATION OF THE DRIVE MOTOR
AND OF ITS CARBON BRUSHES.
FOR FURTHER DETAILS SEE THE
WORKSHOP MANUAL OR CALL THE
SERVICE PERSONNEL.
306:
OVERTEMPERATURE ON THE
POWER ELECTRONIC BOARD.
AUTOMATIC STOP OF ALL THE
FUNCTIONS OF THE MACHINE.
TURN-OFF THE KEY AND WAIT FOR THE SELF
COOLING OF THE ELECTRONIC BOARD (AT LEAST
20 MINUTES). THEN CHECK THAT THE ROTATION
OF THE DRIVE MOTOR AND/OR OF THE BRUSH
MOTOR(S) IS FREE.
IT COULD BE USEFULL TO REDUCE THE PRESSURE
OF THE BRUSH(ES) ON THE FLOOR.
IF THE 306 CODE OCCURS
FREQUENTLY CALL THE SERVICE
PERSONNEL.
307:
WRONG SWITCH-ON SEQUENCE:
THE ACCELERATOR THUMB
WHEELS WERE OUT OF THE
NEUTRAL POSITION WHEN TURNING
ON THE KEY.
THE MACHINE IS NOT ABLE TO
WORK.
PUT THE ACCELERATOR THUMB WHEELS IN THE
NEUTRAL POSITION.
IN THE EVENT THAT THE 307 CODE IS STILL
FLASHING A CHECK OF THE TWO
MICROSWITCHES DEDICATED TO THE FORWARD/
REVERSE DRIVE CONTROL MUST BE DONE (CALL
THE SERVICE PERSONNEL).
CHECK THAT NO INTERFERENCE OCCURS
BETWEEN THE HAND GRIPS AND THE THUMB
WHEELS.
308:
THE WIRES OF THE POTENTIOMETER
ARE CUT.
THE MACHINE IS NOT ABLE TO
WORK.
1-CHECK THE CONNECTION CABLES OF THE
POTENTIOMETER DEDICATED TO THE SPEED
CONTROL.
2- IF THE POTENTIOMETER CONNECTION CABLES
ARE GOOD REPLACE THE POTENTIOMETER (CALL
THE SERVICE PERSONNEL).
