Page 1
Service
Manual
SC530
www.crescentindustrial.co.uk
Page 2
Table of Contents
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Machine General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Service Manual Purpose and Field of Application . . . . . . . . . . . . . . . . . . . . . . 1
Other Reference Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Service and Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Serial Number Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Machine Lifting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Transporting The Machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Machine Nomenclature (machine structure) . . . . . . . . . . . . . . . . . . . . . . . . . 7
Service and Diagnostic Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wiring diagram (machine without drive) . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wiring diagram (machine with drive) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Handlebar and drive switches disassembly/assembly (ES3) . . . . . . . . . . . . . . . . . 15
Checking/Replacing Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table of Contents iService Manual – SC530
Recovery Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Brushing System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Solution Supply System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Squeegee System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Maintenance and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Drive System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Page 3
Service Manual – SC530
General Information
General Information
Machine General Description
The SC530 is a walk-behind commercial oor scrubbing machine designed to wash and dry commercial oors. The machine
is powered by on-board batteries. The machine is equipped with a single-disc scrubbing pad, a controlled solution ow dosing
system, and a rear squeegee with vacuum suction. The machine also has an on-board solution tank and wastewater recovery
tank. This machine is not to be used outdoors, on carpets, or on coarse oors.
Service Manual Purpose and Field of Application
This Service Manual is a technical resource intended to aid service personnel in maintaining and repairing the SC530 to
ensure optimum performance and long service life. Please read this manual carefully before performing any maintenance and
repair procedure on the machine.
Other Reference Manuals
Document name Document number Document type
SC530 53 BD GO / SC530 53 B GO, Instructions for Use VS13009 Instructions for Use
SC530 53 BD GO / SC530 53 B GO, Parts List VS13014 Parts List
1
These manuals are available at:
– Local Nilsk Retailer
– Nilsk website: www.nilsk.com
Conventions
Forward, backward, front, rear, left or right are intended with reference to the operator’s position, that is to say in driving
position.
Page 4
Service Manual – SC530
General Information
Service and Spare Parts
Service and repairs must be performed only by authorized personnel or Nilsk Service Centers. The authorized
personnel is trained directly at the manufacturer’s premises and has original spare parts and accessories.
Contact Nilsk Retailer indicated below for service or to order spare parts and accessories, specifying the machine model and serial number.
(Apply Retailer label here)
2
Serial Number Label
The Model Number and Serial Number of your machine are shown on the Nameplate on the machine. This
information is needed when ordering repair parts for the machine. Use the space below to note the Model
Number and Serial Number of your machine for future reference.
MODEL NUMBER ______________________________
SERIAL NUMBER ______________________________
Page 5
Service Manual – SC530
General Information
Safety
Symbols
It is important for you to read and understand this manual. The information it contains relates to protecting
your safety and preventing problems. The symbols below are used to help you recognize this information.
Warning: Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury
Caution: Indicates a potentially hazardous situation which, if not avoided, could result in
minor or moderate injury.
Caution: When used without the Safety Alert Symbol, indicates a potential situation which,
if not avoided, could result in property or machine damage.
Nota: Indicates an important informational message.
3
General Safety Instructions
These safety instructions are included to warn you of potential bodily injury or property damage.
Caution! Read and understand all safety warnings and instructions. Failure to follow the
warnings and instructions may result in electric shock, re, and/or serious injury.
– To avoid personal injury, this machine should be used only by properly trained
and authorized persons.
– Do not operate the machine near toxic, dangerous, ammable and/or explosive
materials. This machine is not suitable for collecting dangerous or hazardous
materials.
– In case of re, use a powder re extinguisher, not a water-based extinguisher.
– Do not use on surfaces having a gradient exceeding that marked on the machine.
While on ramps or inclines, avoid sudden stops when loaded. Avoid abrupt sharp
turns.
– Disconnect the power source and/or batteries before servicing electrical
components
– Never work under a machine without safety blocks or stands to support the
machine.
– Do not dispense ammable cleaning agents, operate the machine on or near
these agents, or operate in areas where ammable liquids exist.
– When using oor cleaning detergents, follow all safety and handling instructions
of the respective manufacturer.
– Battery charging may produce highly explosive hydrogen gas. Charge the
batteries only in well-ventilated areas and away from ignition sources or open
ames.
– When operating this machine, ensure that third parties, particularly children, are
not endangered.
– Take precautions to prevent hair, jewelry, or loose clothing from becoming caught
in moving parts.
Page 6
Service Manual – SC530
Property Damage Messages
– Storage and operation temperature must be above 0°C and a humidity between
– Before use, all doors and hoods should be properly latched.
– This machine is not approved for use on public paths or roads.
– This machine is only approved for hard surface use.
– Use brushes and pads supplied with the machine or those specied in the User
– Do not wash the machine with direct or pressurised water jets, or with corrosive
– Do not allow the brush/pad to operate while the machine is stationary to avoid
– Use only factory authorized parts and accessories.
– This machine must be properly disposed of in accordance with local laws and
Machine Lifting
30% and 95%, non-condensing.
Manual. Using other brushes or pads could reduce safety.
substances.
damaging the oor.
regulations.
General Information
4
Caution! Never work under a machine without safety stands or blocks to support the
machine.
Transporting The Machine
Caution! Before transporting the machine on an open truck or trailer, make sure that . . .
– All covers are closed
– The recovery tank and detergent tank are empty
– Batteries (if so equipped) are disconnected
– The machine is securely fastened in place on the transport.
Page 7
Service Manual – SC530
General Information
Technical Data
MODEL Units SC530 53 B GO SC530 53 BD GO
Packing dimensions (Lx W x H) mm 1370x600x1300
Machine height mm 1080
Machine length mm 1260
Machine width (without squeegee) mm 550
Machine weight with empty tanks (without
batteries)
Gross vehicle weight (GVW) Kg 208 214
Shipping weight Kg 121 127
Solution tank capacity Liter 61
Recovery tank capacity Liter 61
Vacuum motor power Watt 350
Vacuum capacity mm H
Climbing capacity (Max) % 2%
Front wheel diameter mm 200
Rear wheel diameter mm 76
Sound level dB(A) 69±3
Solution/water Flow CL/M 0 – 240
Working width MM 530
Squeegee width MM 760
Brush/pad diameter MM 530/508
Brush motor power Watt 450
Brush speed Rpm 150
Brush/pad pressure(Max) Kg 27 23
Brush type / 1Disc
Drive motor power Watt / 150
Working speed Km/h / 0-4.5
Voltage V 24V
Battery Ah 12V 115AhC20
Battery charger V/A 24V/13A
Battery compartment size (L x W x H) mm 350X350X300
Kg 91 97
O 1200
2
5
Page 8
Service Manual – SC530
General Information
Maintenance Schedule
Procedure Daily, after use Weekly/ Monthly Every 6 Months Annually
Charge Battery X
Clean squeegee blades X
Inspect pad/brush X
Clean solution and recovery tanks X
Inspect recovery tank seal X
Inspect squeegee blades for damage X
Clean the solution lter X
Inspect for loose fasteners and electrical connections X
Inspect/replace scrub motor brushes (battery model) X
1 Also perform this inspection after the initial 10 hours of new machine usage.
1
6
Page 9
Service Manual – SC530
Machine Nomenclature (machine structure)
General Information
7
1. Recovery tank cover
2. Can holder
3. Handlebar
4. Control panel
5. Squeegee lifting/lowering lever
6. Gardena coupling
7. Power supply cable holder
8. Power cable
9. Solution drain and level check hose
10. Deck lifting/lowering pedal
a) Pedal position when deck is lifted
b) Pedal position when deck is lowered
11. Squeegee knobs
12. Serial number plate/technical data
13. Squeegee vacuum hose
14. Squeegee
15. Squeegee balance adjusting knob
16. Solution/clean water tap
17. Rear steering wheels
18. Solution lter
19. Front wheels on xed axle (A).
Driving wheels (B)
20. Brush/pad-holder
21. Brush/pad-holder deck
22. Recovery water drain hose
23. Solution tank
24. Hinge
25. Recovery tank
26. Metal lter
27. Filler hose holder
28. Clean water inlet
29. Recovery tank cover
30. Tank cover gasket
31. Debris collection box (*)
32. Bend tube
33. Float ball lter
34. Mop and trash kit (*)
35. Solenoid valve
(*): Optional
(A): Only for machine without traction
(B): Only for machine with traction
25
24
23
22
21
20
19
21
18 17 16 15 11 14 13 12 11
3
B
29
4
28
5
27
6
26
7
8
9
10
10b
10a
30
31
32
33
34
35
Figure 1
Page 10
Service Manual – SC530
Machine Nomenclature (control panel)
General Information
8
36. Machine backward switch (B)
37. Tank safety cable
38. Battery connector (red)
39. Detergent tank ller plug (**)
40. Detergent tank (**)
41. Reference table for detergent proportioning (**)
42. Detergent pump (**)
43. Detergent tank - pump connecting hose (**)
44. Detergent feed hose (**)
45. Batteries
46. Battery caps
47. Flow increase switch
48. Flow decrease switch
49. Solution ow indicator
50. Safe switch
51. Discharged battery warning light (red)
52. Semi-discharged battery warning light (yellow)
53. Charged battery warning light (green)
54. Ignition key (0 - I)
55. Detergent ow control knob (**)
56. Speed adjuster (B)
57. Hour meter
58. Brush/pad-holder release switch
59. Vacuum system switch
60. Brush/pad-holder and vacuum system
switch
61. Charging red LED
62. Charging yellow LED
63. Charging green LED
64. Security cover of charging jack
65. Overload protector of brush
66. Overload protector of main (B)
67. Overload protector of vacuum
(*): Optional
(**): Only for machines with Chemical Mixing
System (optional)
(A): Only for machine without traction
(B): Only for machine with traction
36
37
38
39
40
41
42
43
44
45
46
49
48
47
50 51 52 53 50
54
55
56
59 586057
636261
656667 64
Figure 2
Page 11
Service Manual – SC530
General Information
Service and Diagnostic Equipment
Besides a complete set of standard meters, the following instruments are necessary to perform fast checks and
repairs on Nilsk-Advance machines:
Laptop computer charged with the current version of EzParts, Adobe Reader and (if possible) Internet con-
nection
• Digital Volt Meter (DVM)
• Amp clamp with possibility of making DC measurements
• Battery charge tester to check 12 V batteries
• Dynamometric wrench set
• A copy of the User Manual and Spare Parts List of the machine to be serviced (provided with the machine
or available at www.advance-us.com or other Nilsk-Advance websites).
9
Page 12
Service Manual – SC530
General Information
10
Page 13
Service Manual – SC530
Control System
Wiring diagram (machine without drive)
Control System
11
BAT
RD1
F2
RD2
RD2
M1
ES1
RD3
IN1
BK1
BK2
RD-BK
RD2
WH
WH
VR2
WH
RD2
NC
CH
BK2
IN2
RD3
BK2
YE
ES1
BN-BK
ES2
BU-BK
RD3
IN1
RD3
IN2
RD-BK
K1
J6
F1
F3
RD4
9
EB1
J4
J5
1
BN3
2
10
BN3
3
11
4
12
SW1
5
13
BU
6
14
BU
7
15
BK5
8
16
J1
BN3
J2
RD4
BU
WH
SW2
M4
M5
BK5
BN1
F5
BN3
M2
BK3
ES2
BK3
Figure 1
COMPONENTS
Key CODE Description
BAT N/A 24V BATTERIES RD1 RED/6AWG
CH VS10204 BATTERY CHARGER RD2 RED/10AWG
EB1 VS13201 CONTROL PANEL BOARD RD3 RED/16AWG
ES1 9095127000 BRUSH MOTOR ELECTROM SWITCH RD4 RED/20AWG
ES2 VS10201 VACUUM MOTOR ELECTROM SWITCH BK1 BLACK/6AWG
F1 VS13208 LOW POWER CIRCUIT FUSE BK2 BLACK/10AWG
F2 ZD48320 BRUSH MOTOR CIRCUIT BREAKER BK3 BLACK/12AWG
F3 VS13209 BRUSH RELEASE FUSE BK5 BLACK/20AWG
F5 ZD48320 VACUUM MOTOR CIRCUIT BREAKER RD-BK RED-BLACK/20AWG
K1 VR13436 KEY SWITCH BN1 BROWN/12AWG
M1 VS10702 BRUSH MOTOR BN3 BROWN/20AWG
M2 VF90520 VACUUM MOTOR BN-BK BROWN-BLACK/20AWG
M4 VF90282 SOLENOID VALVE BU BLUE/20AWG
M5 N/A DETERGENT PUMP (**) BU-BK BLUE-BLACK/20AWG
SW1 VS10202 BRUSHS/DRIVE MICRO SWITCH YE YELLOW/20AWG
SW2 VS10202 BRUSHS/DRIVE MICRO SWITCH WH WHITE/20AWG
VR2 N/A DETERGENT PUMP POTENTIOMETER (**)
WIRE ROD
(**)= For machines with Chemical Mixing System (Optional)
Page 14
Service Manual – SC530
Wiring diagram (machine with drive)
Control System
12
RD1
RD2
BAT
ES1
RD3
IN1
BK1
RD-BK
RD2
F2
VR2
RD2
RD2
NC
ES1
CH
M1
BK2
IN2
RD3
BK2
BK2
BN-BK
ES2
BU-BK
ES3
BK5
IN1
IN2
RD-BK
K1
J6
WH
WH
WH
YE
RD3
RD3
F1
F3
RD4
GN
24V
EB1
J4
J2
J5
OR
BN3
2
10
BN3
11
3
WH
signal 1
4
12
WH
SW1
SW2
13
14
15
J1
signal 2
5
BU
6
BU
7
BK5
89116
M4
BN3
RD4
BU
WH
M5
BK5
BN2
F4
BN2
B+
BK4
B-
M2
RD4
M2
BU-BK
GN-BK
M1
BK4
M1
1
10
11
2
EB2
312
WH
signal 2
413
GN
24V
5
14
15
6
16
7
OR
8
17
18
9
M3
WH
VR1
signal 1
SW3
ES3
GN-BK
BN1
F5
BN3
M2
BK3
ES2
BK3BK4
Figure 2
COMPONENTS
Key CODE Description
WIRE ROD
BAT N/A 24V BATTERIES RD1 RED/6AWG
CH VS10204 BATTERY CHARGER RD2 RED/10AWG
EB1 VS13201 CONTROL PANEL BOARD RD3 RED/16AWG
EB2 VS10209 DRIVE ELECTRONIC BOARD RD4 RED/20AWG
ES1 9095127000 BRUSH MOTOR ELECTROM SWITCH BK1 BLACK/6AWG
ES2 VS10201 VACUUM MOTOR ELECTROM SWITCH BK2 BLACK/10AWG
ES3 VS10201 DRIVE SYSTEM ELECTROM SWITCH BK3 BLACK/12AWG
F1 VS13208 LOW POWER CIRCUIT FUSE BK4 BLACK/14AWG
F2 ZD48320 BRUSH MOTOR CIRCUIT BREAKER BK5 BLACK/20AWG
F3 VS13209 BRUSH RELEASE FUSE RD-BK RED-BLACK/20AWG
F4 VF99012 DRIVE SYSTEM CIRCUIT BREAKER GN GREEN/20AWG
F5 ZD48320 VACUUM MOTOR CIRCUIT BREAKER GN-BK GREEN-BLACK/20AWG
K1 VR13436 KEY SWITCH BN1 BROWN/12AWG
M1 VS10702 BRUSH MOTOR BN2 BROWN/14AWG
M2 VF90520 VACUUM MOTOR BN3 BROWN/20AWG
M3 VS11702 DRIVE MOTOR BN-BK BROWN-BLACK/20AWG
M4 VF90282 SOLENOID VALVE BU BLUE/20AWG
M5 N/A DETERGENT PUMP (**) BU-BK BLUE-BLACK/20AWG
SW1 VS10202 BRUSHS/DRIVE MICRO SWITCH OR ORANGE/20AWG
SW2 VS10202 BRUSHS/DRIVE MICRO SWITCH YE YELLOW/20AWG
SW3 VS10202 REVERSING SWITCH WH WHITE/20AWG
VR1 VS10213 SPEED POTENTIOMETER
VR2 N/A DETERGENT PUMP POTENTIOMETER (**)
(**)= For machines with Chemical Mixing System (Optional)
Page 15
Service Manual – SC530
Troubleshooting
Trouble Possible causes Remedy
Control System
13
The machine is not working
The three battery charge indicators ash
simultaneously
The batteries (BAT) are discharged or its
connections are not efcient
Batteries faulty Check the battery no-load voltage
Battery charger faulty Replace
The fuses (F1, F2, F3) are open Replace
The wiring harness is cut or pressed or
short circuited
Control electronic board faulty Replace
Brush motor overloaded Use less aggressive brushes
Debris or wires/cords entangled in the
brush hub, slowing its rotation
Charge the batteries or clean/repair the
connections
Repair
Remove the brush and remove any
debris/wires/cords
Page 16
Service Manual – SC530
Control System
Removal and Installation
Control panel and control electronic board disassembly/assembly (EB1)
Disassembly
1. Drain the recovery tank.
2. Turn the ignition key to “0” and remove it.
3. Make sure that the machine cannot move independently.
4. Turn the recovery tank sideways, then disconnect the battery connector.
5. Unscrew the screws (A) and carefully move the control panel (B).
6. Disconnect the electrical connections (C) from the control electronic board (D).
7. Unscrew the screws (E), then remove the control electronic board (D) from the control panel.
8. If necessary, disconnect the electrical connections (F) and remove the control panel.
Assembly
9. Assemble the components in the reverse order of disassembly.
14
A
C
C
E
B
E
A
F
C
Figure 3
C D
E C
E
Page 17
Service Manual – SC530
Control System
Handlebar and drive switches disassembly/assembly (ES3)
Disassembly
1. Drain the recovery tank.
2. Turn the ignition key to “0” and remove it.
3. Make sure that the machine cannot move independently.
4. Turn the recovery tank sideways, then disconnect the battery connector.
5. Unscrew the screws (A) and carefully move the control panel (B).
6. Unscrew the screws and detach the retaining clamps (C) from the wiring.
7. In zone (D), disconnect the electrical connections for the wiring (E), ensuring you note down the colors of
the individual wires for reference during reassembly.
8. Loosen the screws inside the holes (F) (with a 6 mm hex socket wrench), then remove the handlebar (G)
from its seat.
9. If necessary, proceed as follows to remove the drive switches (H).
• Unscrew the screws (I) and detach the switch assembly.
• Unscrew the inner screws (J) and remove the plate (K) and the springs (L).
• Apply a feeler to the end (M) of the cable of the switch (H) concerned, then remove the switch with
cable and leave the feeler in its place (to be used to reinsert the cable during reassembly).
10. If necessary, proceed as follows to remove the reverse switch (N).
• Remove the switch (N) from its seat using a small blade screwdriver.
• Apply a feeler to the end (P) of the cable of the switch (N), then remove the switch with cable and
leave the feeler in its place (to be used to reinsert the cable during reassembly).
15
Assembly
11. Assemble the components in the reverse order of disassembly.
A
I
E
C
B
A
K
H
L
I
G
I
D
E
C
L
I
H
J
J
P
N
G
F
Figure 3
M
F
M
Page 18
Service Manual – SC530
Rear panel disassembly/assembly
Disassembly
1. Drain the recovery tank.
2. Turn the ignition key to “0” and remove it.
3. Make sure that the machine cannot move independently.
4. Turn the recovery tank sideways, then disconnect the battery connector.
5. Lower the squeegee (A) with the lever (B).
6. Disconnect and lower the recovery water drain hose (C).
7. Unscrew and remove the caps (D) of the thermal fuses.
8. Lift the cover (E) and unscrew the electrical connection fastening screws (F).
9. Unscrew the screws (G), then move the rear panel (H).
10. Disconnect the electrical connection (I) from the rear panel (H), after rotating it 90°.
11. Remove the rear panel (H).
Assembly
12. Assemble the components in the reverse order of disassembly.
Control System
16
G
H
G
B
G
A
C
G
G
D
F
E
I
Figure 4
Page 19
Service Manual – SC530
Control System
Drive system electronic board disassembly/assembly
Disassembly
1. Remove the rear panel (see the procedure in the relevant paragraph).
2. Disconnect the electrical connections (A) on the drive system electronic board (B), then move the wiring
out of the way.
3. Unscrew the two screws (C) and remove the drive system electronic board (B).
Assembly
4. Assemble the components in the reverse order of disassembly.
17
Figure 5
C
C
A
B
Page 20
Service Manual – SC530
Control System
Battery charger disassembly/assembly
Disassembly
1. Drain the recovery tank.
2. Turn the ignition key to “0” and remove it.
3. Make sure that the machine cannot move independently.
4. Turn the recovery tank sideways, then disconnect the battery connector.
5. Disconnect the terminals of the right-hand battery (A), then remove it using suitable lifting equipment.
6. Unscrew the screws (B) and disconnect the battery connector (C).
7. Remove the rear panel (see the procedure in the relevant paragraph).
8. Unscrew the fastening screws (D) for the battery charger (E), then move it.
9. Disconnect the battery charger electrical connection (F).
10. Disengage the battery charger wiring (G) from its seat.
11. Disengage the battery charger wiring (H) from its seat.
12. Remove the battery charger (E).
Assembly
13. Assemble the components in the reverse order of disassembly, and note the following.
• If a new battery charger is installed, it must be set for the type of batteries installed on the machine,
WET or GEL/AGM, before use.
18
A
D
C
B
H
G
E
F
D
H
Figure 6
Page 21
Service Manual – SC530
Checking/Replacing Fuses
Fuses on control panel (F1), (F3)
1. Drain the recovery tank.
2. Turn the ignition key to “0” and remove it.
3. Make sure that the machine cannot move independently.
4. Turn the recovery tank sideways, then disconnect the battery connector.
5. Unscrew the screws (A) and carefully move the control panel (B).
6. Check/replace the following fuses:
• (C): fuse (F1), rated 5 A, for protection of the control electronic board
• (D): fuse (F3), rated 20 A, for protection of the brush motor
7. Perform steps .4 and .5 in reverse order.
Control System
19
D
Figure 7
A
B
A
Fuses on control panel (F2), (F4), (F5)
1. Remove the rear panel (see the procedure in the relevant paragraph).
2. Remove the following thermal fuses (resettable):
• (E): fuse (F5), rated 30 A, for protection of the vacuum motor
• (F): fuse (F4), rated 12 A, for protection of the drive motor (*)
• (G): fuse (F2), rated 30 A, for protection of the brush rotation motor
(*): Only on machines with drive system
C
Figure 8
E
F
G
Page 22
Service Manual – SC530
Control System
20
Page 23
Service Manual – SC530
Recovery Water System
Troubleshooting
Trouble Possible causes Remedy
The switch is broken Replace
Recovery Water System
21
The vacuum system motor does not turn on
The recovery water vacuuming is insufcient
or there is no vacuuming
The vacuum system motor is faulty Check the amperage.
The fuse is blown Replace.
The recovery tank is full Drain the recovery tank
The vacuum hose is disconnected from the
squeegee
The vacuum grid is dirty or the oat is
blocked
The tank cover is not correctly positioned Adjust
The tank cover gasket is not in good
condition
The vacuum gaskets are damaged or do not
match perfectly
The squeegee vacuum hose is broken Replace
The vacuum tank is broken Repair/replace
Connect.
Clean the grid/reactivate the oat
Clean/replace
Repair or replace
Page 24
Service Manual – SC530
Recovery Water System
Removal and Installation
Vacuum System Amperage Check
Warning! Thisproceduremustbeperformedbyqualiedpersonnelonly.
1. Drain the recovery tank.
2. Make sure that the machine cannot move independently.
3. Turn the recovery tank (A) sideways.
4. Apply the amp clamp on the cable from the positive pole of the batteries (B).
5. Turn on the machine with the ignition key.
6. Turn on the vacuum system and check that the motor power draw is around 16 A at 24V.
• Stop the vacuum system.
• Turn the ignition key to “0”.
• Remove the amp clamp.
If the amperage is higher, perform the following procedures to detect and correct the abnormal amperage:
• Check that the relevant fuse (F5) is properly fastened.
• Check there is no debris or dirt inside the vacuum hose.
• If necessary, disassemble the motor (see procedure in the relevant paragraph), and check the condi-
tion of all its components.
If the above-mentioned procedures do not lead to a correct amperage, the motor must be replaced (see the
procedure in the relevant paragraph).
22
Reassembly
7. Perform step 3 in reverse order.
Figure 1
A
B
Page 25
Service Manual – SC530
Recovery Water System
Vacuum System Motor disassembly/assembly (M2)
Disassembly
1. Drain the recovery tank.
2. Turn the ignition key to “0” and remove it.
3. Make sure that the machine cannot move independently.
4. Turn the recovery tank sideways, then disconnect the battery connector.
5. Working from the bottom of the recovery tank, unscrew the screws (A) and remove the vacuum motor
retention plate (B).
6. Remove the vacuum motor (C) with the shock absorbing ring (D) and shock absorber casings (E) and (F).
7. Disconnect the vacuum motor electrical connection (G).
8. Extract the vacuum motor (C), and if necessary separate it from parts (D), (E) and (F).
Assembly
9. Assemble the components in the reverse order of disassembly.
A
E
23
Figure 2
D
B
A
F
E
D
C
F
C
G
Page 26
Service Manual – SC530
Recovery Water System
24
Page 27
Service Manual – SC530
Brushing System
Troubleshooting
Trouble Possible causes Remedy
Brushing System
25
The brush does not clean properly
One brush does not turn
The brush is excessively worn Replace
The batteries are discharged. Charge them
The motor carbon brushes are worn Replace
The motor is faulty Check the motor amperage/replace the
motor
There are ropes or debris restraining the
brush rotation
The brush motor thermal fuse has blown Reset it
The motor electromagnetic switch is
damaged
The wiring harness is damaged Repair
Remove and clean
Replace
Page 28
Service Manual – SC530
Brushing System
Removal and Installation
Brush Motor Amperage Check
Warning! Thisproceduremustbeperformedbyqualiedpersonnelonly.
1. Drain the recovery tank.
2. Remove the brush.
3. Make sure that the machine cannot move independently.
4. Turn the recovery tank (A) sideways.
5. Apply the amp clamp on the cable from the positive pole of the batteries (B).
6. Turn on the machine with the ignition key.
7. Start brush rotation and check that the motor power draw is around 3 A at 24V.
• Stop brush rotation.
• Turn the ignition key to “0”.
• Remove the amp clamp.
If the amperage is higher, perform the following procedures to detect and correct the abnormal amperage:
• Check that the relevant fuse (F2) (F3) is properly fastened.
• Check that there is no dirt, debris or entangled cords on the brush hub.
• If necessary, disassemble the motor (see procedure in the relevant paragraph), and check the condi-
tion of all its components.
If the above-mentioned procedures do not lead to a correct amperage, the motor must be replaced (see the
procedure in the relevant paragraph).
26
Reassembly
8. Perform steps 2 and 4 in reverse order.
Figure 1
A
B
Page 29
Service Manual – SC530
Brushing System
Brush Deck Disassembly/Assembly
Disassembly
1. Drain the recovery tank.
2. Drain the clean water tank.
3. Remove the brush.
4. Remove the squeegee.
5. Remove the machine’s batteries.
6. Position a attened cardboard box the same size as the machine’s side. With the assistance of a second
person, turn the machine over sideways and rest its right-hand side on the box positioned on the oor.
7. Remove the screws (A) and remove the splash guard (B).
8. Loosen the clamp (C) and disconnect the water hose (D) from the brush deck.
A
B
27
Figure 2
A
C
D
D
Page 30
Service Manual – SC530
Brushing System
Brush Deck Disassembly/Assembly (Continues)
9. Mark the position of the nut (E) with respect to the threaded tie rod (F) of the spring (G) (position to be
used during reassembly).
10. Unscrew the nut (E), then disconnect the tie rod (F) from the support (S).
11. Unscrew the left-hand retaining screw (H) with self-locking nut (I) of the brush deck.
12. Unscrew the right-hand retaining screws (M) with self-locking nut (N) of the brush deck.
13. Retain the at washers (J), the spring washers (K) and the bearing bushes (L).
14. Move the brush deck (P) from its seat.
15. Cut and remove the heat-shrink tubing (Q), then disconnect the electrical connection below for the brush
motor (R).
Assembly
16. Assemble the components in the reverse order of disassembly, and note the following.
• If, during reassembly, it is not possible to identify the position of the nut (E) with respect to the
threaded tie rod (F), or the spring must in any case be adjusted, proceed as follows:
• Tension the spring using the nut (E) until the brush deck (P) is parallel to the oor, looking at it from
the front.
• Also check that the deck moves smoothly by operating the lifting/lowering pedal; if necessary, slightly
adjust the tension of the spring using the nut (E), ensuring that the brush deck (P) remains parallel
to the oor.
28
G
F
E
S
M-N
G
P
R
H
M
J
L
J
N
L
J
K
J
K
I
F
E
H
R
P
Q
P
Figure 3
Page 31
Service Manual – SC530
Brushing System
Brush Motor Carbon Brushes Disassembly/Assembly
Disassembly
1. Remove the brush deck (see procedure in the relevant paragraph); it is not necessary to disconnect the
brush motor electrical connection.
2. Unscrew the screws (A) and remove the brush motor (C) protection strip (B).
3. For each of the motor’s four carbon brushes, disengage the spring (D) and remove the carbon brush (E)
from its seat, then detach the carbon brush by disengaging its electrical connection (F).
4. Check the condition of the four carbon brushes (E). Replace the carbon brushes when the contact with
the motor armature is insufcient or if the carbon brush contact surface is not intact due to wear, or if
the thrust spring is broken, etc. If the residual length of the carbon brushes is minimal, they must be
replaced in any case.
Replace all motor carbon brushes at the same time.
5. Assemble the components in the reverse order of disassembly.
C
29
Figure 4
B
A
E
F
D
E
F
D
Page 32
Service Manual – SC530
Brushing System
Brush Motor Disassembly/Assembly (M1)
Disassembly
1. Remove the brush deck (see procedure in the relevant paragraph).
2. Unscrew the screw (A) and remove the brush hub (B), along with the ange.
3. Remove the brush motor (D) fastening screws (C).
4. Remove the brush motor (D) from the brush deck (E).
Assembly
5. Assemble the components in the reverse order of disassembly, and note the following.
• Position the brush motor (D) in the position shown in the gure with respect to the brush deck (E).
30
Figure 5
E
B
D
C
A
C
Page 33
Service Manual – SC530
Solution Supply System
Troubleshooting
Trouble Possible causes Remedy
The solution lter is clogged/dirty Clean
Solution Supply System
31
Small amount of solution or no solution
reaches the brush
The solution reaches the brush also when the
machine is off
Solenoid valve faulty or electrical connection
broken
There is dust/debris in the tank or in the
detergent hoses, obstructing the solution ow
There is dirt or calcium deposit on the
solenoid valve gaskets (EV1)
The solenoid valve is faulty Replace the solenoid valve
Replace the solenoid valve or repair the
electrical connection
Clean the tank/hoses
Replace the solenoid valve
Page 34
Service Manual – SC530
Solution Supply System
Removal and Installation
Solenoid Valve Disassembly/Assembly (M4)
Disassembly
1. Remove the wheels assembly with drive system motor (see the procedure in the relevant paragraph).
2. Loosen the clamps (A) and disconnect the hoses (B) from the solenoid valve (C).
3. Unscrew the screws (D) and move the solenoid valve (C).
4. Cut the wiring retaining clamp (E).
5. Cut the heat-shrink tubing (F) then disconnect the electrical connections (G) on the solenoid valve (C).
6. Remove the solenoid valve (C).
Assembly
7. Assemble the components in the reverse order of disassembly.
32
D
B
C
C
A
A
B
E
F
D
G
Figure 1
Page 35
Service Manual – SC530
Squeegee System
Squeegee System
Functional Description
The squeegee suction hose draws air/water from the squeegee assembly. The squeegee consists of two squeegee
blades: a forward, notched blade, and a rear scraping blade. The notched blade permits water to pass into the
space between the two blades, where it is drawn into the suction hose.
Troubleshooting
Trouble Possible causes Remedy
33
The recovery water vacuuming is insufcient
or there is no vacuuming
The squeegee leaves water marks on the
oor
The squeegee or the vacuum hose is clogged
or damaged
There is debris under the blade Remove
The squeegee blade edges are torn or worn Replace
The squeegee springs are not efcient Replace
The squeegee is not correctly adjusted Adjust it
Clean or repair/replace
Page 36
Service Manual – SC530
Squeegee System
Maintenance and Adjustment
Squeegee Blade Changing
The two squeegee blades periodically need to be changed as they wear. The blades may be ipped or reversed to
a fresh edge up to 3 times before replacement is required. During replacement, it is important for the blades to be
installed at without waves, and then also adjusted to rest at against the oor.
1. Remove the squeegee suction hose (C) from the squeegee assembly (A).
2. Loosen the two thumbscrews (B) and slide the squeegee assembly out of the mounting slots, and remove
the squeegee.
34
Figure 1
B
A
C
B
Page 37
Service Manual – SC530
Squeegee System
3. Pull out on the latch (D) to release the tension on the retaining strap.
4. Separate the retaining hooks (E) from the two halves of the retaining strap.
5. Slide each retaining strap (G) toward the outside, and lift them off the edge retaining hooks (H).
6. Remove the backing pad (F), and retain it for placement after rotating or replacing the squeegee blade.
7. Remove the squeegee blade from the squeegee frame.
• The squeegee can be rotated and/or ipped 3 times to expose a new edge (4 edges total) to the lower
front. If all 4 edges are worn, replace the squeegee blade with a new one.
8. Lay the squeegee blade (H) over the frame (K), and make sure the tabs and slots (J) are aligned.
9. Replace the strap (G) and make sure the backing pad (F) is positioned at the seam between the straps.
10. Before tightening the latch, make sure the blade is straight without waves.
35
Figure 2
D
F
E
H
K
M
L
J
G
F
H
G
Page 38
Service Manual – SC530
Squeegee System
11. Loosen the clamping thumbscrew (P) on the rear strap (L), and remove the strap from the frame.
12. Remove the rear squeegee blade.
– The squeegee can be rotated and/or ipped 3 times to expose a new edge (4 edges total) to the lower
front. If all 4 edges are worn, replace the squeegee blade with a new one.
13. Lay the squeegee blade (M) over the frame (H), and make sure the tabs and slots (J) are aligned.
14. Replace the strap (L) and retighten the clamping thumbscrew until the strap is tight against the frame.
15. Rest the squeegee assembly at on the oor and examine the edge of each blade (front/rear) to make
sure it is at without any waves (N).
– Make this examination with the squeegee assembly still removed from the machine. There should be
no unnecessary downward force on the squeegee blades.
– If there are waves, loosen the strap and straighten the blade.
16. Examine both front and rear squeegee blades to make sure they are the same height, and that both
blades rest at on the oor when the squeegee frame is sitting level.
– Because the squeegee is curved, it is important that the blades be level with the frame, and then the
frame will be adjusted level to the oor in the next procedure.
17. Reinstall the squeegee assembly to the machine.
36
18. Perform the Squeegee Trim AdjustmentSqueegee Trim Adjustment described on page 37 Instruction
for Use.
Figure 3
L
P
N
G
Page 39
Service Manual – SC530
Squeegee System
Squeegee Trim Adjustment
The squeegee trim adjustment ensures that the squeegee frame is level with the oor when the squeegee is in the
lowered, operating position. If the trim is out of adjustment, the squeegee can leave streaks of water at either the
center or the edges of the squeegee.
1. If this procedure is not being performed as a follow-up to replacing the squeegee blade(s), then make the
blade examinations.
2. With the machine parked on a level surface, lower the squeegee to the oor.
3. Examine the contact area between the squeegee blades and the oor. The squeegee blades should be in
even contact with the oor.
– A small bubble level (B) may be used to set the frame of the squeegee to be level with the oor.
4. If the squeegee is tilted up, there will be a gap at the center, and the level’s bubble will be toward the
rear of the machine.
– Turn the adjustment knob (A) counterclockwise.
5. If the squeegee is tilted down, there will be a gap at the outsides of the squeegee, and the level’s bubble
will be toward the front of the machine.
– Turn the adjustment knob (A) clockwise.
37
Figure 4
A
Gap
B
Gap
Page 40
Service Manual – SC530
Squeegee System
Removal and Installation
Squeegee spring disassembly/assembly
Disassembly
1. Drain the recovery tank.
2. Drain the clean water tank.
3. Remove the brush.
4. Remove the squeegee.
5. Remove the machine’s batteries.
6. Position a attened cardboard box the same size as the machine’s side. With the assistance of a second
person, turn the machine over sideways and rest its right-hand side on the box positioned on the oor.
7. Remove the screw with the nut (A) and free the squeegee lifting tie rod (B).
8. Rotate the frame (C) and release the spring tension (D).
38
9. Unscrew the self-locking nut (E) and remove the screw (F), then remove the spring (D) on the squeegee.
Assembly
10. Assemble the components in the reverse order of disassembly.
D
F
E
C
B
Figure 5
A
Page 41
Service Manual – SC530
Drive System
Troubleshooting
Trouble Possible causes Remedy
Thermal fuse blown/broken Reset/Replace
The machine does not move
Drive is weak or non-existent
The machine has been started using the ignition
key, keeping one of the switches pressed.
Cord entangled in wheel hubs Remove
The motor is faulty Check the motor amperage/replace the motor
Drive system electronic board faulty Replace
Turn the ignition key to “0”, then restart the
machine without pressing the switches.
Drive System
39
Page 42
Service Manual – SC530
Drive System
Removal and Installation
Drive System Motor Amperage Check
Warning! Thisproceduremustbeperformedbyqualiedpersonnelonly.
1. Drain the recovery tank.
2. Drain the clean water tank.
3. Drive onto a smooth, at oor.
4. Lift the squeegee.
5. Lift the brush.
6. Turn the recovery tank (A) sideways.
7. Apply the amp clamp on the cable from the positive pole of the batteries (B).
8. Turn on the machine with the ignition key.
9. Taking great care and ensuring safety conditions allow, drive the machine at minimum speed and check
that the motor power draw is around 2.5 A at 24 V. Then drive the machine at the maximum possible
speed and check that the motor power draw is around 15 A at 24 V. Repeat the test driving at least two
different directions across the oor to compensate for any unevenness.
• Stop the machine.
• Turn the ignition key to “0”.
• Remove the amp clamp.
If the amperage is higher, perform the following procedures to detect and correct the abnormal amperage:
• Check that the relevant fuse (F4) is properly fastened.
• Check that there is no dirt, debris or entangled cords on the drive wheel hubs and the rear steering
wheels.
• If necessary, disassemble the drive system motor (see the procedure in the relevant paragraph), and
check the condition of all its components.
If the above-mentioned procedures do not produce the correct readings for the drive system motor
power draw, the motor must be replaced (see the procedure in the relevant paragraph).
40
Reassembly
10. Perform step 6 in reverse order.
Figure 1
A
B
Page 43
Service Manual – SC530
Drive System
Wheels Assembly with Drive System Motor disassembly/assembly (M3)
Disassembly
1. Drain the recovery tank.
2. Drain the clean water tank.
3. Remove the brush.
4. Remove the squeegee.
5. Remove the machine’s batteries.
6. Remove the rear panel (see the procedure in the relevant paragraph).
7. Disconnect the electrical connections (B) of the drive motor wiring from the drive system electronic
board (A).
41
Figure 2
B
A
Page 44
Service Manual – SC530
Drive System
Wheels Assembly with Drive System Motor disassembly/assembly (M3)
(Continues)
8. Position a attened cardboard box the same size as the machine’s side. With the assistance of a second
person, turn the machine over sideways and rest its right-hand side on the box positioned on the oor.
9. Remove the wheels assembly with drive motor (D) fastening screws (C).
10. Move the wheels assembly with drive motor (D).
11. Cut the retaining clamp (E) on the wheel assembly with drive motor (D) wiring.
12. Remove the wheels assembly with drive motor (D).
Assembly
13. Assemble the components in the reverse order of disassembly.
42
Figure 3
D
C
D
C
E
Page 45
Service Manual – SC530
Drive System
Wheels Disassembly/Assembly
Disassembly
1. Drain the recovery tank.
2. Drain the clean water tank.
3. Remove the brush.
4. Remove the squeegee.
5. Remove the machine’s batteries.
6. Position a attened cardboard box the same size as the machine’s side. With the assistance of a second
person, turn the machine over sideways and rest its right-hand side on the box positioned on the oor.
7. Unscrew the screws (A) inside the wheel.
8. Remove the outer cover (B) of the wheel.
9. Unscrew the screw (C) and remove the wheel (D).
Assembly
10. Assemble the components in the reverse order of disassembly.
43
C
D
B
D
Figure 4
Drive System Motor disassembly/assembly (M3)
Disassembly
A
A
Page 46
Service Manual – SC530
Drive System 44
1. Remove the wheels assembly with drive system motor (see the procedure in the relevant paragraph).
2. Unscrew the screws (A) inside the two wheels.
3. Remove the outer cover (B) of the wheels.
4. Unscrew the screws (C) and remove the wheels (D).
5. Remove the drive motor.
Assembly
6. Assemble the components in the reverse order of disassembly.
D
B
C
Figure 5
A
A
Page 47
We supply a full range of cleaning
equipment for rental or purchase.
For more information, or a cleaning
solution to suit your business,
please get in touch –
For a more comprehensive product range, please visit our website.
www.crescentindustrial.co.uk
Address Contact
Berrington House,
Berrington Road,
Leamington Spa
CV31 1NB
t: 0845 33 77 695
f : 0845 33 78 695
e : info@c-ind.co.uk
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