Nilfisk-Advance ATTIX 33-21 PC / IC, ATTIX 33-2H PC / IC, ATTIX 33-2L PC / IC, ATTIX 33-2M PC / IC, ATTIX 44-2H PC / IC Service Manual

Blue line models:

ATTIX 33-01 IC
ATTIX 33-2L PC / IC - ATTIX 33-21 PC / IC
ATTIX 44-2L PC / IC - ATTIX 44-21 PC / IC
ATTIX 33-2M PC / IC - ATTIX 33-2H PC / IC
ATTIX 44-2M PC / IC - ATTIX 44-2H PC / IC

ENGLISH VER. 1

ATTIX 33/44 L + M + H
VHS 40/42 L + M + H

Service manual

Grey line models:
VHS 40 L30 PC / IC
VHS 40 L30 LC FM IC
VHS 40 L40 LC FM IC
VHS 42 L30 MC PC / IC
VHS 42 L30 HC PC / IC
VHS 42 L40 MC PC / IC
VHS 42 L40 HC PC / IC

ROBE

Reinigungsmaschinen

Moltkestraße 13 | 89281 Altenstadt-Illereichen
Tel.: 0 83 37 / 75 301 | Fax 0 83 37 / 75 303
[e-mail]

www.wap-nilfisk-alto-shop.de

Hotline: 08337 - 75301

2

2

Index

A. Safety issues 4

B. Technical data 5

C. Construction / function 9

D. Troubleshooting 13

E. Service / repair 15

F. Spare parts 28

G. Electrical diagrammes 32

H. Tools 38

3

3

A

Preface

In this manual you will find
the essentials you need to

know when repairing wet and
dry cleaners of the ATTIX and
VHS series.

When carrying out repairs,
make sure you have a suitable

workbench or the like with the
necessary power supply
available.

If you determine an error in
operation, be sure to refer the
customer to the user manual.

A fault in the equipment
can have a number of causes.
Chapter D Troubleshooting
will help you here.

Use the illustrated spare
parts lists for your repairs.
These show you the location
of the individual parts and the

sequence in which they are
assembled.

Read the technical infor­mation sheets. These will tell
you about any technical modi­fications made after publica­tion of this repair manual.

Technical information sheets
are a supplement to the spare
parts list until a follow-on publi­cation.

Repair manuals and technical
information sheets should be

available at the site where re­pairs are carried out. Further
repair manuals of the ATTIX
and VHS series may be nec­essary for repairs to the equip­ment.

It is not permitted to give the
repair manuals to third parties.

Use original Nilsk spare
parts only!

Safety instructions marked
with this symbol in this man-

ual must be observed to
prevent danger to persons.

This symbol is used to
mark safety instructions
that must be observed to
prevent damage to the
equipment and degradation
of performance.

This symbol indicates tips
and instructions to simplify
work and to ensure safe
operation.

Symbols used to mark
instructions



4

4

A

Safety issues

Observe national safety
directives and regulations
for the electrical engineer-

ing trade, in particular:

IEC 60335-2-69
EN 60335-2-69

DIN VDE 105 part 1:
operation of electrical
power installations.

DIN VDE 0701/0702:
repair, modification and
testing of electrical installa-

tions.

Before starting the equip­ment, be sure to read the

accompanying user
manual, and keep it close
as reference.

The equipment should
only be used by persons
who have been instructed
in its use and are author-

ized to do so.

Repairs should only be
made by someone who has
received proper instrucons
for the job or who is a quali­ed electrician

WARNING:
The upper secon of the

machine contains live com­ponents. Contact with live
components leads to seri­ous or even fatal injuries.

Always disconnect the
mains plug before disassem­bly.

For your own safety.

ESD (electrostac discharge)

Observe the following ESD precautions before any
repair of or near electronic parts:

• Touch the protective conductor to discharge your own body.

• Possibly wear an anti-static wrist strap.

• Use a conducting floor or tabletop.

• Never touch a circuit board or electronic components - always hold them by the

plastic or insulation.

• Transport electronic parts in conductive packaging (e.g. special ESD packages).



5

5

B

Technical data

ATTIX 33/44Standard and L-class machines

6

6

B

Technical data

ATTIX 33/44 M & H-class machines

7

7

B

Technical data

VHS 40/42 Standard and L-class machines

8

8

B

Technical data

VHS 40/42 M & H-class machines

9

9

C

Construction

Control panel

PCBA

Filter cleaning
system

Full tank sensor

Hose diameter setting

Flow/filter alarm indicator

Socket for power tools

Motor speed control

Rotary on/off switch

Control panel

Hatchback

Motor

unit

Buzzer

alarm

Flow

sensor

Solenoid

actuator

10

10

C

Construction

30 ltr container 42 ltr container

Main filter element, PTFE

Floater - full tank sensor

for liquids

AntiStatic grounding clip

Container clamp

Air flow cover

11

11

C

Function

Push&Clean - semi-automatic filter cleaning system

2

1

By sealing the suction opening (1) a
high negative pressure is generated
inside the dirt tank.

By actuating the cleaning button (2) on
the suction head, an air flap is opened
on backside of filter.

The negative pressure inside the dirt
tank is reduced very quickly and a re­versed air pulse flows through the fil­ter .

The dirt adhered to the filter is blown
and shaken off, causing it to fall back
into the tank.

To optimise the cleaning effect, we
recommend that you actuate the
cleaning button briefly a number of
times.

12

12

C

Function

Even with extremely fine dust the automatic filter cleaning function allows you to work constantly
with the same suction performance without having to manually clean the filter.

A powerful reversed air pulse is activated every 15 second keeping the air flow on a high level. The
air pulse is created by a solenoid connected to a piston with double-valve. When the valve is
opened a pulse is created by difference in pressure between outside and inside of container (dirty
side of filter). The negative pressure is reduced very quickly and a reversed air pulse flows through
the filter. The dirt adhered to the filter is blown and shaken off, causing it to fall back into the tank.

InfiniClean - Automatic filter cleaning system

Double valve system

Solenoid actuator

13

13

D

Troubleshooting

Check:

- Mains voltage present?

- Power cord plugged into socket?

- Switch set to “I” ?

Connect switch - PCB - motor.
Is motor running?

Connect motor directly to
mains. Is motor working?

Replace motor.

Connect motor directly to
switch. Is motor running?

Yes

Yes

Yes

No

No

No

Motor not working with switch set to ”I”

Yes

Check connections and
replace switch if needed.

Check connections and
replace PCB if needed.

Check if machine is working
correctly. Calibrate flow sen­sor if needed (section E.8).

No

Job done!!



14

14

D

Troubleshooting

Check:

- Mains voltage present?

- Power cord plugged into wall socket?

- Switch set to “AUTO/TOOL” ?

- Load with > 60W plugged into socket?

Motor not working with switch set to ”AUTO/TOOL”

Yes

No

Connect switch - PCB - motor.
Is motor running?

Connect motor directly to
mains. Is motor working?

Replace motor.

Connect motor directly to
switch. Is motor running?

Yes

Yes

Yes

No

No

No

Check connections and
replace switch if needed.

Check connections and
replace PCB if needed.

Disconnect socket.

Reconnect socket. Plug
adequate load into socket.

Start load. Is motor running?

No

Check connections, socket and
PCB and replace if needed.

Yes

Check if machine is working
correctly. Calibrate flow sen­sor if needed (section E.8).

Job done!!



15

15

E

1. Change motor unit 19

3. Replace rotary switch 21

4. Replace power socket 22

0. Disassembly 16

5. Change hatch back clamp 23

6. Change H-class/HEPA filter 24

7. Change solenoid 25

Service / repair

8. Flow sensor calibration 26

2. Change power cord 20

16

16

E.0

Disassembly

1

3

2

Loosen and lift the top part
of the handle with a flat­headed screwdriver and
unscrew the lower part of
the handle (fig.1).

Unscrew the topcover

(fig.2).

Open the hatch back and
take out the filter (fig.3).

WARNING: The upper section of the

machine contains live components.
Contact with live components leads
to serious or even fatal injuries.

Always disconnect the mains plug
before disassembly.

17

17

E.0

Disassembly

Disconnect and dismount Hatch back

1

2

3

Unscrew the cable relief (fig.1).

Disconnect the two solenoid wi­res from the grounding (fig.2)
and the PCBA (fig.3).

WARNING: The upper section of the

machine contains live components.
Contact with live components leads
to serious or even fatal injuries.

Always disconnect the mains plug
before disassembly.

18

18

E.0

Disassembly

4

Disconnect and dismount Hatch back

(continued)

Dismount the hatch back by pressing the hinge in
each side (fig.4).

19

19

E.1

Change motor unit

1

2

Disassemble the handle, top cover, filter and hatch back as described in previous
Section E.0.

Disconnect the motor wires from the PCBA and the switch (circles in fig.1)

Unscrew the airguide over the motor (fig.1).

Replace the motor unit.

Pay close attention to positioning the motor, gaskets and the wires correctly (see
fig.2).

Then repeat the process backwards to assemble the machine.

Motor connection
to PCBA

Motor connection
to swicth

WARNING: The upper section of the

machine contains live components.
Contact with live components leads
to serious or even fatal injuries.

Always disconnect the mains plug
before disassembly.

20

20

E.2

Change power cord

4

Disassemble the handle, top cover, filter and hatch back as described in previous Section E.0.

Disconnect the wires on power cord from their connection points on switch and earth grounding

(fig.1-3).

Unscrew the cable relief and pull the cord out of the relief hole (fig.4).

Install new power cord of same type as original.

Then repeat the process backwards to assemble the machine. Be carefull to place the cord in
the proper cable guides.

1

2

3

WARNING: The upper section of the

machine contains live components.
Contact with live components leads
to serious or even fatal injuries.

Always disconnect the mains plug
before disassembly.

21

21

E.3

Replace rotary switch

1

2

Disassemble the handle and top cover as described in previous Section E.0.

Take off control panel and disconnect the wires on the switch (fig.1).

Unscrew the rotary knob and dismount the rotary switch (fig.2).

Then repeat the process backwards to assemble the machine.

WARNING: The upper section of the

machine contains live components.
Contact with live components leads
to serious or even fatal injuries.

Always disconnect the mains plug
before disassembly.

22

22

E.4

Replace power socket

1

Disassemble the handle and top cover as described in previous Section E.0.

Take of control panel and disconnect the wires on the power socket (fig.1).
Unscrew the power socket and replace it (fig.2).

Then repeat the process backwards to assemble the machine.

2

WARNING: The upper section of the

machine contains live components.
Contact with live components leads
to serious or even fatal injuries.

Always disconnect the mains plug
before disassembly.

23

23

E.5

Change hatchback clamp

2

1

Disassemble the handle and top cover as descri­bed in previous Section E.0.

Unscrew the two plastic covers on the hatch
back (fig.1).

Dismount the clamp by pressing the outer metal
pin ”A” from right side (fig.2). Notice position of
the spring (fig.3).

Dismount the clamp lever by pressing the outer
metal pin ”B” from right side (fig.2).

Replace the clamp.

Repeat the process backwards to assemble the
machine.

A

B

3

3

24

24

E.6

Change H-class/HEPA filter

Open the container clamps (fig.1) and turn motor head upside down.

Unscrew and remove the orange filter cover (fig.2).

Take off H-class/HEPA filter and dispose it in a safe manner.

WARNING: Filter might be contaminated by hazardous dust.

Wear a P2 breathing mask and avoid spreading harmful dust.

Install new filter gasket and make sure it is in correct position (fig.3).
Install new H-class/HEPA filter (fig.4).

Re-mount the orange filter cover and fasten all 4 screws sufficiently
to make sure a proper sealing is obtained.

Turn motor head and place on container. Close the clamps.

1

2

3

4

25

25

E.7

Change solenoid

1

2

3

4

Disassemble the handle and top cover as described in
previous Section E.0.

Unscrew the two plastic covers on the hatch back (fig.1).

Unscrew the valve/piston cover (fig.2).

Disconnect the solenoid wires from PCBA and earth clip.

Relieve the solenoid and unscrew the cable relief (fig.3).

Carefully take out the piston and the solenoid (fig.4)

Replace the solenoid (including wiring) and make sure it
is correct assembled and placed into correct position.

Repeat the process backwards to assemble the machine.

If needed the complete hatch back can be replaced. Unscrew the two plastic covers on
the hatch back (fig.1) and reuse the covers.

WARNING: The

upper section of
the machine con­tains live compo­nents. Contact
with live compo­nents leads to se­rious or even fatal
injuries.

Always disconnect
mains plug before
disassembly.

26

26

E.8

Flow sensor calibration

Switch off the machine, disconnect the
mains plug and take off handle and top cover
as described in previous Section E.0.

Connect the calibration switch tool (P/N:

107416579) to connector (A) on the PCBA

(fig.1).

Position the hose diameter selector to posi­tion “Ø32” (fig.2).

Insert the air restrictor with manometer (P/N:
62480 + P/N 40434) into the container inlet
(fig.3).

Flow sensor calibration should be carried out, if the PBCA or flow sensor has been changed
during service. Also it is recommended to do a flow sensor calibration, if the motor unit has
been replaced.

When?

1

2

3

foto

27

27

E.8

Flow sensor calibration

Reconnect the mains plug and switch ON the
machine to start the suction unit.

WARNING: The upper section of the

machine contains live components.
Contact with live components leads to
serious or even fatal injuries.

Adjust/rotate the air restrictor (fig.4) until the
manometer is indicating the following under
pressure level:

165±5 mbar on 220-240V machines
120±5 mbar on 100-120V machines

The machine will now run. Depending on the
service condition the buzzer alarm might be ac­tivated.

Keep the machine turned ON for 5-6 minutes
to pre-heat the air flow system. Check that the
manometer is still indicating the correct under
pressure level.

After pre-heating press the calibration switch
button connected to the PCBA (fig.5)

Observe that the machine begins to alternate its
internal buzzer if not already activated. This sig­nals that the automatic calibration process is
started.

Let the machine run and wait approximately 1
minute until the suction unit re-starts.

The air flow system is now calibrated.

Switch OFF the machine and disconnect the
mains plug.

Disconnect the calibration switch tool from the
PCBA.

Make sure the PCBA is mounted correctly and
reassemble the machine.

4

Continued

5

28

28

F

Spare parts

Cabinet and controlpanel

29

29

F

Spare parts

Motor unit, floater / reed
sensor, flow sensor, buz­zer, PCBA and hinge
snaps

30

30

F

Spare parts

Baseplate

31

31

F

Spare parts

Filter cleaning system - PC

Filter cleaning system - IC

32

32

G

Electrical diagrammes

21 PC 100-240V
42 PC 100-240V

For 100-120V

For 100-120V

For 120V US

Capacitor X2

Motor PCBA Reed switch

Main switch /

Speed selector

01 PC 100-240V
40 PC 100-240V

Socket

33

33

G

Electrical diagrammes

Work instruction
107416926

Work instruction 107417862

For 100-120V

For 100-120V

For 120V US

Solenoid

Speed

Socket

Motor PCBA Reed switch

Main switch /

Mode selector

21 IC 100-240V
42 IC 100-240V

01 IC 100-240V
40 IC 100-240V

34

34

G

Electrical diagrammes

Work instruction 107416926

Work instruction 107417862

Solenoid

Speed

Socket

Motor PCBA

Reed switch

Flow sensor

Buzzer

Main switch /

Mode selector

Hose selector

LED Air flow /

Filter warning

0M IC 100-240V
40 MC IC 100-240V

For 100-120V

35

35

G

Electrical diagrammes

2H PC 100-240V
42 HC PC 100-240V

Work instruction
107416926

Work instruction 107417862

Socket

Motor PCBA

Reed switch

Flow sensor

Buzzer

Pressure

sensor

Main switch /

Speed

Hose selector

LED Air flow /

Filter warning

2M PC 100-240V
42 MC PC 100-240V

36

36

G

Electrical diagrammes

2H IC 100-240V
42 HC IC 100-240V

Work instruction
107416926

For 100-120V

For 120V US

Work instruction 107417862

Solenoid

Speed

Socket

Motor PCBA Reed switch

Flow sensor

Buzzer

Pressure

sensor

Main switch /

Mode selector

Hose selector

LED Air flow /
Filter warning

For 100-120V

2M IC 100-240V
42 HC IC 100-240V

37

37

G

Electrical diagrammes

Wire overview

38

38

H

Tools

1. Manometer setting tool P/N 40434

2. Air restrictor setting tool P/N 62480

3. Callibration switch P/N 107416579

1

2

3