Troubleshooting; Open Circuit; Either Brush Doesn't Rotate; One Brush Does Not Rotate - Nilfisk-Advance BA 600S Service Manual

SERVICE MANUAL

TROUBLESHOOTING

Open circuit

The fuse (56) causes an open in the circuit supplying the Function electronic board (54). This system allows to prevent
the circuits from being damaged in case of failure.
If there is an open in the fuse, the possible causes are the following.
1. Function electronic board (54) wiring harness damaged or short-circuit (inspect the function electronic board (54)
power cables and their connectors).
2. Function electronic board (54) damaged (replace).

Either brush doesn't rotate

Possible cause:
1. Brush rotation microswitch not correctly adjusted or faulty (adjust or replace).
2. Microswitch - Function electronic board wiring harness damaged (repair).
3. Function electronic board - brush motor wiring harness damaged (repair).
4. Function electronic board damaged (replace).

One brush does not rotate

Possible cause:
1. Motor carbon brushes worn (replace the motor carbon brushes).
2. Bulky debris or cords around the brushes or between the brushes and their flanges (remove the brushes and the
debris or cords).
3. Motor malfunction (repair or replace the motor).
4. Wiring harness damaged (repair).
The brushes do not reach correctly the lifted, lowered or extrapressure position (one or more positions are
wrong)
Possible cause:
1. Brush deck lifting/lowering actuator limit switch positions not correctly adjusted (adjust the actuator limit switch
positions).
2. Brush deck lifting/lowering actuator limit switch position microswitches faulty (replace them).
3. Brush deck lifting/lowering actuator faulty (replace).
4. Actuator wiring harness open (check the connections in the chapter Electrical System, paragraph Troubleshooting).
32 909 5484 000(1)2004-03