ATTIX 33/44 L + M + H

VHS 40/42 L + M + H
Service manual
Hotline: 08337 - 75301
Moltkestraße 13 | 89281 Altenstadt-Illereichen
R O B E Tel.: 0 83 37 / 75 301 | Fax 0 83 37 / 75 303
Reinigungsmaschinen info@wap-nilfisk-alto-shop.de

www.wap-nilfisk-alto-shop.de ENGLISH VER. 1

Blue line models: Grey line models:

ATTIX 33-01 IC VHS 40 L30 PC / IC
ATTIX 33-2L PC / IC - ATTIX 33-21 PC / IC VHS 40 L30 LC FM IC
ATTIX 44-2L PC / IC - ATTIX 44-21 PC / IC VHS 40 L40 LC FM IC
ATTIX 33-2M PC / IC - ATTIX 33-2H PC / IC VHS 42 L30 MC PC / IC
ATTIX 44-2M PC / IC - ATTIX 44-2H PC / IC VHS 42 L30 HC PC / IC
VHS 42 L40 MC PC / IC
VHS 42 L40 HC PC / IC

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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

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Preface A
In this manual you will find A fault in the equipment Technical information sheets
the essentials you need to can have a number of causes. are a supplement to the spare
know when repairing wet and Chapter D Troubleshooting parts list until a follow-on publi-
dry cleaners of the ATTIX and cation.
will help you here.
VHS series.
Repair manuals and technical
Use the illustrated spare
When carrying out repairs, parts lists for your repairs. information sheets should be
make sure you have a suitable available at the site where re-
workbench or the like with the These show you the location pairs are carried out. Further
necessary power supply of the individual parts and the repair manuals of the ATTIX
sequence in which they are and VHS series may be nec-
available. assembled. essary for repairs to the equip-
ment.
If you determine an error in Read the technical infor-
operation, be sure to refer the mation sheets. These will tell It is not permitted to give the
customer to the user manual. you about any technical modi- repair manuals to third parties.
fications made after publica-
tion of this repair manual.
Use original Nilfisk spare
parts only!

Symbols used to mark

instructions 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.

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Safety issues A
Observe national safety
For your own 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:
Repairs should only be repair, modification and
made by someone who has testing of electrical installa-
received proper instructions tions.
for the job or who is a quali-
fied electrician Before starting the equip-
ment, be sure to read the
WARNING: accompanying user
The upper section of the manual, and keep it close
machine contains live com- as reference.
ponents. Contact with live
components leads to seri- The equipment should
ous or even fatal injuries. only be used by persons
Always disconnect the who have been instructed
mains plug before disassem- in its use and are author-
bly. ized to do so.


ESD (electrostatic 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).

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Technical data B
ATTIX 33/44Standard and L-class machines

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Technical data B
ATTIX 33/44 M & H-class machines

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Technical data B
VHS 40/42 Standard and L-class machines

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Technical data B
VHS 40/42 M & H-class machines

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Construction C
Hatchback

Solenoid
actuator
Filter cleaning
system

Motor
unit
Full tank sensor

Flow
sensor
PCBA
Buzzer
alarm

Control panel

Control panel

Hose diameter setting Motor speed control

Flow/filter alarm indicator Rotary on/off switch

Socket for power tools

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Construction C

Main filter element, PTFE

Floater - full tank sensor

for liquids
Container clamp

Air flow cover

AntiStatic grounding clip

30 ltr container 42 ltr container

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Function C
Push&Clean - semi-automatic filter cleaning system

By sealing the suction opening (1) a

2 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 re-
versed air pulse flows through the fil-
ter .
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
1 cleaning button briefly a number of
times.

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Function C
InfiniClean - Automatic filter cleaning system
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.

Double valve system Solenoid actuator

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Troubleshooting D
Motor not working with switch set to ”I”

Check:
Yes - Mains voltage present?
- Power cord plugged into socket?
- Switch set to “I” ?

No

No
Connect motor directly to Replace motor. Check if machine is working
mains. Is motor working? correctly. Calibrate flow sen-
sor if needed (section E.8).

Yes
Yes

No
Connect motor directly to Check connections and
Job done!!
switch. Is motor running? replace switch if needed.

Yes

No
Connect switch - PCB - motor. Check connections and
Is motor running? replace PCB if needed.

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

Check:
Yes - Mains voltage present?
- Power cord plugged into wall socket?
- Switch set to “AUTO/TOOL” ?
- Load with > 60W plugged into socket?
No

No
Connect motor directly to Replace motor. Check if machine is working
mains. Is motor working? correctly. Calibrate flow sen-
sor if needed (section E.8).
Yes
Yes

Disconnect socket.

Job done!! 
No
Connect motor directly to Check connections and
switch. Is motor running? replace switch if needed.

Yes

No
Connect switch - PCB - motor. Check connections and
Is motor running? replace PCB if needed.

Yes

Reconnect socket. Plug

adequate load into socket.

No
Start load. Is motor running? Check connections, socket and
PCB and replace if needed.

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Service / repair E

0. Disassembly 16

1. Change motor unit 19

2. Change power cord 20

3. Replace rotary switch 21

4. Replace power socket 22

5. Change hatch back clamp 23

6. Change H-class/HEPA filter 24

7. Change solenoid 25

8. Flow sensor calibration 26

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Disassembly E.0
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.

1 2

Loosen and lift the top part

3
of the handle with a flat-
headed 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).

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Disassembly E.0
WARNING: The upper section of the
machine contains live components.
Disconnect and dismount Hatch back Contact with live components leads
to serious or even fatal injuries.
Always disconnect the mains plug
before disassembly.
1

Unscrew the cable relief (fig.1).

Disconnect the two solenoid wi-
res from the grounding (fig.2)
and the PCBA (fig.3).

2 3

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Disassembly E.0

Disconnect and dismount Hatch back

(continued)

Dismount the hatch back by pressing the hinge in

each side (fig.4).

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Change motor unit E.1

WARNING: The upper section of the
machine contains live components.
Contact with live components leads
to serious or even fatal injuries.
1
Always disconnect the mains plug
before disassembly.

Motor connection
to PCBA

Motor connection
to swicth

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.

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Change power cord E.2

1 3

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.

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.

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Replace rotary switch E.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.

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.

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Replace power socket E.4

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.

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.

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Change hatchback clamp E.5

1 2

Disassemble the handle and top cover as descri-

bed in previous Section E.0.

3 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.

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Change H-class/HEPA filter E.6

1 2

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.

3 4

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Change solenoid E.7

WARNING: The
1 upper section of
2
the machine con-
tains live compo-
nents. Contact
with live compo-
nents leads to se-
rious or even fatal
injuries.
Always disconnect
mains plug before
disassembly.

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.

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Flow sensor calibration E.8

When?
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.

Switch off the machine, disconnect the

1
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 posi-
tion “Ø32” (fig.2).
Insert the air restrictor with manometer (P/N:
62480 + P/N 40434) into the container inlet
(fig.3).

2 3

foto

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Flow sensor calibration E.8

Continued Reconnect the mains plug and switch ON the

machine to start the suction unit.

WARNING: The upper section of the

4 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 ac-
tivated.
Keep the machine turned ON for 5-6 minutes
to pre-heat the air flow system. Check that the
5
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 sig-
nals 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.

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Spare parts F

Cabinet and controlpanel

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Spare parts F

Motor unit, floater / reed

sensor, flow sensor, buz-
zer, PCBA and hinge
snaps

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Spare parts F

Baseplate

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Spare parts F

Filter cleaning system - PC

Filter cleaning system - IC

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Electrical diagrammes G

Reed switch PCBA Motor Capacitor X2

Main switch /
Speed selector

Socket

For 100-120V

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

For 100-120V

For 120V US

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

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Electrical diagrammes G

Reed switch PCBA Motor Socket

Speed

Main switch /
Mode selector

Solenoid

Work instruction 107417862

107416926

For 100-120V

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

For 120V US
For 100-120V

21 IC 100-240V
42 IC 100-240V
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Electrical diagrammes G

Reed switch PCBA Motor Socket

Speed

Main switch /
Mode selector

Hose selector

Solenoid

LED Air flow /

Filter warning

Flow sensor Buzzer

Work instruction 107417862

107416926

For 100-120V

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

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Electrical diagrammes G

Reed switch PCBA Motor Socket

Main switch /
Speed

Hose selector

LED Air flow /

Filter warning

Flow sensor Buzzer Pressure

sensor
Work instruction 107417862
107416926

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

2H PC 100-240V
42 HC PC 100-240V
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Electrical diagrammes G

Reed switch PCBA Motor Socket

Speed

Main switch /
Mode selector

Hose selector

Solenoid
LED Air flow /
Filter warning

Flow sensor Buzzer Pressure

sensor
Work instruction 107417862
107416926

For 100-120V

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

For 120V US

For 100-120V

2H IC 100-240V
42 HC IC 100-240V
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Electrical diagrammes G

Wire overview

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Tools H

1. Manometer setting tool P/N 40434

2. Air restrictor setting tool P/N 62480
3. Callibration switch P/N 107416579

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