Scrub System, Disc 84Service Manual – SC3000
Troubleshooting
Open circuit
• The fuse (F1) determines an open in the supply circuit of the brush deck motors. This system allows to
prevent the circuits from being damaged under overload conditions.
• The open in the fuse can be caused by the following:
◦ Short circuit in the brush motor wiring harness; fault in the motor.
Trouble Possible Causes Remedy
All brushes do not turn The brush motor electromagnetic switch wiring harness
is damaged
Repair
The function electronic board (EB1) is faulty Replace
The wiring harness between function electronic board
(EB1) and brush motor electromagnetic switch (ES1) is
damaged
Repair
The brush motor electromagnetic switch (ES1) is
damaged
Replace
The brush motor fuse (F1) is open Replace
One brush does not rotate The motor carbon brushes are worn (replace). Replace
Bulky debris or cords around the brushes or between the
brushes and its ange
Remove and clean the brushes
The motor is faulty Repair or replace
The wiring harness is damaged Repair
The brush cannot be lifted/lowered See the Electrical System chapter,
function electronic board error
codes
The deck lifting/lowering actuator (M5) end-of-stroke
microswitches are broken
Replace the actuator
The deck lifting/lowering actuator (M5) is broken Replace
Open circuit in the actuator wiring harness Check the connections according
to the instructions in the Electrical
System chapter, Troubleshooting
paragraph
The actuator fuse (F4) is open Replace
The function electronic board (EB1) is damaged Replace
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