Technical presentation SC350
Welcome to the technical
presentation on NILFISK SC350,
The aim of the training is to provide
you with technical points of the
machine.
1
Technical specifications
VOLTAGE (V)
IP PROTECTION CLASS
IPX4
INSULATION CLASS
III
RATED POWER (W)
450
BRUSH MOTOR (W)
240
VACUUM MOTOR POWER (W)
200
AIRFLOW (L/SEC)
17,8
VACUUM (KPA)
6,9
SOUND PRESSURE LEVEL (dB(A))
64
WATER FLOW (L/M)
SOLUTION/RECOVERY TANK (L)
2
12
0,25 / 0,5
11/11
BRUSH PRESSURE (KG)
27
BRUSH SPEED (RPM)
140
BRUSH SIZE (MM)
370
Turnable BRUSH DECK
The system works once the machine is lifted due the friction of the rubber pad (D) on the
top of the brush allow the deck is pulled by the brush rotation.
Disassembly:
1. Remove the screw (C), then remove the hub assembly (D).
2. Remove the 4 screws (E).
3. Remove the gear motor.
4. Remove the 4 screws (A), the flange (B) and disassemble the brush deck.
5. Check the rubber pads (D) for integrity; if necessary replace them.
3
BRUSH DECK - TROUBLESHOOTING
Open circuit
The resettable fuse (F1) determines an open in the supply circuit of the brush deck motor.
This system allows to prevent the circuits from being damaged under overload conditions.
The open in the fuse can be caused by the following:
1. Short circuit in the brush motor wiring harness; fault in the motor.
2. Overvoltage of the gear motor.
Brush do not turn Possible causes:
1. The brush motor electromagnetic switch wiring harness is damaged (repair).
2. The brush motor electromagnetic switch (ES1) is damaged (replace).
3. The brush motor fuse (F1) is tripped (reset).
4. The motor is faulty (repair or replace).
5. The wiring harness is damaged (repair).
Malfunction of the brush deck mechanical rotation system Possible causes:
1. The rubber pads between deck and brush are worn (replace).
2. The rubber damping joint is worn (replace).
3. The end-of-stroke cable is broken (replace).
4
BRUSH MOTOR ELECTRICAL INPUT CHECK
Lift the machine,
Apply an ammeter on the blue power supply cable,
Turn on the machine with the main switch, check that the electrical input of the
motor is 6-8 Amps at 12V. (without load)
If the electrical input is higher:
1. Check if there is dust or dirt
(ropes, cables, etc.) on the
brush hubs.
2. Disassemble the motor and
check the condition of all its
components.
3. Replace the motor.
NOTE Sealed gearmotor,
No carbon brush replacement,
No motor available separately,
No gearbox available separately
5
SOLUTION SYSTEM SOLENOID VALVE
Solenoid valve (E) has stamped arrow (F) must be tuned in the direction of the solution
flow as shown in the figure.
6
SOLUTION SYSTEM - TROUBLESHOOTING
Small amount of solution or no solution to the brush
Possible causes:
1. The solution tank valve is clogged/dirty or broken (clean or replace).
2. The solenoid valve (EV) is broken or there is an open in the electrical
connection (replace the solenoid valve/repair the electrical connection).
3. There is debris in the solution tank clogging the output hole (clean the tank).
4. There is debris in the solution hoses and/or reducer clogging the flow (clean
the hose).
The solution reaches the brush also when the machine is off
Possible causes:
1. There is dirt or calcium deposit on the solenoid valve gasket (clean).
2. The solenoid valve (EV) is broken (replace).
7
VACUUM SYSTEM
Apply an ammeter on the cable (B),
Turn on the machine with the main switch,
Check the motor electrical input is 15-18 Amps at 12V.
8
VACUUM SYSTEM - TROUBLESHOOTING
The vacuum system motor does not turn on, Possible causes:
1. The vacuum system motor wiring harness is damaged or disconnected (repair / connect).
2. The fuse (F2) is blown (replace).
3. The vacuum system motor is faulty (check the electrical input).
Dirty water vacuuming is insufficient or there is no vacuuming, Possible causes:
1. The vacuum grid with automatic shut-off fl oat is activated because the recovery tank is full
(empty the recovery tank).
2. The debris tray is clogged (clean).
3. The vacuum grid with automatic shut-off fl oat is dirty, or the vacuum pre-filter is dirty (clean).
4. The tank cover is not correctly positioned (adjust).
5. The tank cover gasket is not efficient (replace/clean).
6. The vacuum system motor filter is dirty (clean).
7. The squeegee or the vacuum hose is clogged or damaged (clean or repair/replace).
8. The vacuum gaskets are damaged or do not match perfectly (repair or replace).
The squeegee leaves lining on the floor or does not collect water, Possible causes:
1. There is debris under the blade (remove).
2. The squeegee blade edges are torn or worn (replace).
9
Battery & onboard charger
Standard on-board charger
• SPE CBHD2 12V 12A high frequency
• POWER SUPPLY:100-240 V±10% 50-60 Hz
• PROTECTION GRADE: IP66
• Fully controlled by machine electronics
• CERTIFICATION: UL RECOGNIZED, PSE
MARKED
• DEFAULT CHARGING CURVES: OPTIMA
BATTERIES
OPTIMA BATTERY
12V 55 Ah C20 AGM SPIRACEL - BTDCM4.2
10
Battery & charger curve selection
DIPSWITCH
CONFIGURATION
11
To change the
dipswitch
configuration,
remove the round
black cap located
close to the
openings on the
bottom of the
charger using a
tool like a
screwdriver.
Component Layout
12
Wiring diagram
13
END OF PRESENTATION
QUESTION & COMMENTS?
14