Nilfisk SC370 43B Wartungshandbuch Seite 41

Service Manual- SC370
Troubleshooting
Trouble
Brush does not clean properly
Brush can't rotate
Brush release function does not work
Brush Motor Amperage Check
Warning! This procedure must be performed by qualified personnel only.
1. Apply the amp clamp (A, Figure 5) to one of the brush motor wires (B, Figure 5).
2. Lift the brush deck by pressing the deck lifting pedal.
3. Press one-button start to turn on the machine.
4. Start brush rotation by pressing the handle switch and check if the current draw of brush motor is between 1A
and 4A at 24V.
5. If the amperage is higher than 4A, perform following procedures to detect and correct the abnormal amperage:
Check and clean the brush hub if there is debris wrapped around it.
Remove brush motor and check the condition of all its components, repair or replace them if necessary.
6.
If above-mentioned procedures can't lead to correct amperage, the brush motor must be replaced.
Possible causes
The brush is excessively worn
There are ropes or debris restraining the
brush rotation
Wiring damaged
Brush motor carbon brushes are worn
Brush motor fuses (F1&F2) have blown
Brush motor damaged
Control board (EB2) is faulty
Control board (EB2) is faulty
Wiring damaged
A
Figure 5
34 Scrub System 40
Remedy
Replace
Remove the brush and clean it
Repair or replace
Replace
Replace
Repair or replace
Replace
Replace
Repair or replace
B