Nilfisk-ALTO NEPTUNE 5 FA User manual

301002099 C
Operating instructions
NEPTUNE 5
NEPTUNE 7
NEPTUNE 8

psi
bar
psi
bar
4
3
5
29
30
24
25
23
27
22
21
28
26
6
11
10
8
9
12
14
13
15
16
17
18
19
20
7
2
1
NEPTUNE 5 / 7 / 8

1
english
1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
Contents
1 Important instructions ............................................................................................................2
2 Description.................................................................................................................................4
2.1 Purpose ...............................................................................................................................4
2.2 Operating elements..............................................................................................................5
3 Before starting the cleaner.......................................................................................................5
3.1 Transport and assembly.......................................................................................................5
3.2 Set the brake........................................................................................................................5
3.3 Install Crank handle for high pressure hose reel/cord reel ..................................................6
3.4 Fill up detergent tanks..........................................................................................................6
3.5 Fill up tank for Nilfisk-Alto AntiStone (Anti-Scale) indicator .................................................6
3.6 Adjusting the Nilfisk-Alto AntiStone (Anti-Scale) device ......................................................6
3.7 Fill up fuel tank.....................................................................................................................7
3.8 Connecting the high pressure hose .....................................................................................7
3.9 Connecting the water supply................................................................................................8
3.10 Electrical connection............................................................................................................8
3.11 Antifreeze - before first use..................................................................................................8
4 Control / Operation....................................................................................................................9
4.1 Connections.........................................................................................................................9
4.2 Switching on the cleaner......................................................................................................9
4.3 Pressure regulation (Tornado Lance) ................................................................................10
4.4 Pressure regulation (VarioPress Gun)1) .............................................................................10
4.5 Using cleaning agents........................................................................................................10
5 Applications and methods .....................................................................................................11
5.1 Techniques.........................................................................................................................11
5.2 Some typical cleaning tasks...............................................................................................12
6 After using the cleaner ...........................................................................................................14
6.1 Switching off the cleaner....................................................................................................14
6.2 Disconnecting supply lines.................................................................................................14
6.3 Rolling up the electrical lead and storing accessories.......................................................14
6.4 Storing the cleaner (below 0°C (32°F))..............................................................................14
7 Maintenance.............................................................................................................................15
7.1 Maintenance Schedule ......................................................................................................15
7.2 Maintenance work..............................................................................................................15
8Troubleshooting ......................................................................................................................17
8.1 Indications on Display........................................................................................................17
8.2 Indication lights on control panel........................................................................................18
8.3 Other Faults .......................................................................................................................18
9 Further information .................................................................................................................18
9.1 Recycling the cleaner.........................................................................................................18
9.2 Guarantee..........................................................................................................................18
9.3 Technical data....................................................................................................................19
9.4 EU Declaration of Conformity ............................................................................................20

2
english
1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
1 Important instructions
Symbols used to mark
instructions
Before using the
high-pressure
cleaner, be sure
to also read the
enclosed operat-
ing instructions
and keep them within reach at
all times.
For your own safety
The high-pressure cleaner should
only be used by authorized per-
sons who have been instructed
in its use.
This appliance is not intended
for use by persons (including
children) with reduced physical,
sensory or mental capabilities,
or lack of experience and knowl-
edge.
High pressure cleaners shall not
be used by children or untrained
personnel.
Children should be supervised to
ensure that they do not play with
the appliance.
General
Use of the high-pressure cleaner
is subject to the applicable local
regulations.
Besides the operating instruc-
tions and the binding accident
prevention regulations valid in the
country of use, observe recog-
nized regulations for safety and
proper use.
Do not use any unsafe work
techniques.
Transport
Transport of the high-pressure
cleaner is easy on its large
wheels.
For safe transport in and on ve-
hicles we recommend preventing
the equipment from sliding and
tilting. Secure it with tie-downs
and apply the parking brake on
the castor wheel.
For transport at temperatures
around or below freezing 0°C
(32°F), anti-freeze should be
drawn into the pump beforehand
(see chapter 6).
Before starting the cleaner
If your 3-phase cleaner was
supplied without a plug, have
it fitted with a suitable 3-phase
plug with ground, by a qualified
electrician.
Before use, check that the high-
pressure cleaner is safe and in
proper condition.
Regularly check whether the
power cord is damaged or shows
signs of ageing.
Use the high-pressure cleaner
only when the power cord is in
a safe condition. (risk of electric
shock using damaged cord!).
Check the rated voltage of the
high-pressure cleaner before
connecting it to the mains power
supply. Ensure that the voltage
shown on the rating plate cor-
responds to the voltage of the
power supply.
We strongly recommend that the
power supply to the high pres-
sure cleaner be connected via a
residual current circuit breaker.
This device stops the supply of
electricity if the leakage current
to the ground exceeds 30 mA for
30 ms or it has an ground tester
circuit.
Please observe the regulations
and provisions applicable in
your area. Before putting the
high-pressure cleaner into ser-
vice, carry out a visual check
of all the major components.
CAUTION!
High-pressure water jets can
be dangerous if misused. The
jet must not be directed at per-
sons, animals, live electrical
equipment or the cleaner itself.
Wear appropriate protective
clothing and eye protection.
Do not direct the jet towards
yourself or towards other per-
Safety instructions
in these operating
instructions which
must be observed
to prevent risks
to persons are marked with this
danger symbol.
This symbol is used to
mark safety instruc-
tions that must be
observed to prevent
damage to the machine
and its performance.
This indi-
cates tips
and instructions
to simplify work
a n d to ensure safe opera-
tion.
Operations
marked with
this symbol
should only be
carried out by
Nilfisk-Alto Service
Technicians.

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NEPTUNE 5 / 7 / 8
sons in order to clean clothes or
footwear.
During operation of the cleaner,
recoil forces are produced at the
gunvalve and spray lance and,
when the spray lance is held at
an angle, a torque is also cre-
ated. The gunvalve and spray
lancemust therefore be held
firmly in both hands.
Do not use the cleaner when
other people without protective
clothing are in the working area.
Check that cleaning will not result
in dangerous substances (e.g.
asbestos, oil) being washed off
the object to be cleaned and
harming the environment.
Do not clean delicate parts
made of rubber, fabric, etc. with
the 0° jet. Keep some distance
between high pressure nozzle
and surface in order to prevent
the surface from damage.
Do not use the high-pressure
hose for lifting loads.
NOTE!
The maximum permissible work-
ing pressure and temperature
are printed on the high-pressure
hose.
Do not use the cleaner if the
power cord or high-pressure
hose is damaged.
Ensure adequate air circulation.
Do not cover the cleaner or oper-
ate it in inadequately ventilated
rooms!
Store the cleaner where
it will not be exposed to
frost!
Never operate the cleaner with-
out water. Even brief shortages
of water result in severe damage
to the pump seals.
Operation
Keep cabinet and service door
closed during operation.
CAUTION!
Unsuitable extension cords
can represent a source of dan-
ger. Always unwind cord from
the reels completely to prevent
the power cord overheating.
Connectors and couplings of
extension cords must be water-
tight.
Extension cords are not recom-
mended, however if necessaray
refer to the following recommen-
dations:
Cord length
m
Cross section
up to16 A up to 25 A
up to 20 m
(US: 30 ft)
(US: 50 ft)
(US: 75 ft)
ø1.5mm²
14 gauge
12 gauge
10 gauge
ø2.5mm²
12 gauge
10 gauge
not recom-
mended
20 to 50 m ø2.5mm² ø4.0mm²
Do not damage the power cord
(e.g. by driving over it, pulling or
crushing it).
Disconnect the power cord by
grasping the plug only (do not
pull or tug the power cord).
CAUTION!
Unsuitable fuels (e.g. gasoline)
must not be used as they can
explode and catch fire.
Use clean fuel only, free of mois-
ture and contamination. Contact
your dealer for fuel source and
type recommendations.
If the machine is to be operated
indoors, the local building regu-
lations must be observed for the
discharge of the exhaust fumes
into the atmosphere. Ensure an
adequate supply of fresh air.
If the machine is to be connected
to a flue gas stack, then local
building regulations must be ob-
served.We will be glad to provide
tips for connection systems, on
request.
CAUTION!
Do not touch or cover the ex-
haust. Risk of burns and fire.
Electrical equipment
CAUTION!
Never spray electrical equip-
ment with water: risk of elect-
trical shock and short-circuit.
The cleaner may only be con-
nected to a correctly installed
plug socket.
Switching on the cleaner may
cause voltage fluctuations.
Voltage fluctuations should not
occur if the impedance at the
transfer point is less than 0.15
If in doubt ask your local electric-
ity supplier.
Maintenance and repair
CAUTION!
Always remove the plug from
the power supply before clea-
ning or carrying out mainte-
nance work on the cleaner.
Carry out only the maintenance
operations described in the
operating instructions. Use only
original Nilfisk-Alto spare parts.
Do not make any technical modi-
fications to the high-pressure
cleaner.
Ensure that the machine is regu-
larly serviced by authorized
Nilfisk-Alto dealers in accordance
with the maintenace plan. Failure
to do so will void the warranty.
CAUTION!
High-pressure hoses, fittings
and couplings are important
for the safety of the cleaner.
Use only high-pressure parts
approved by the manufacturer!
The power cord must not differ
from the version specified by the
manufacturer and may only be
changed by an electrician.
Please contact your local author-
ized Nilfisk-Alto equipment dis-

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Original instruction
NEPTUNE 5 / 7 / 8
tributor for all other maintenance
or repair needs!
Testing
The cleaner conforms to the Ger-
man „Guidelines for Liquid Spray
Jet Devices“. The high-pressure
cleaner must be subjected to a
safety examination in accord-
ance with the „Accident Preven-
tion Regulations for Working
with Liquid Spray Jet Devices“
as required, but at least every
12 months, by an authorised
inspector.
After all repairs or modifica-
tions to electrical equipment,
the protective conductor resist-
ance, the insulation resistance
and the leakage current must
be measured. Furthermore, a
visual inspection of the mains
power lead, a voltage and current
measurement and a function test
must be carried out. Our after-
sales service technicians are
at your disposal as authorised
inspectors.
The complete „Accident Preven-
tion Regulations for Working
with Liquid Spray Jet Devices“
are available from the Carl Hey-
manns Verlag KG, Luxemburger
Strasse 449, 50939 Cologne or
from the appropriate association
of employers’liability insurances.
The pressure-bearing parts of
this high-pressure cleaner have
been manufactured in accord-
ance with § 9 of the German
Pressure Vessels Ordinance
and successfully subjected to a
pressure test.
Unloader valve
Pump pressure is reduced by
means of an "unloader valve"
which returns water to the inlet
side of the pump at a minimum
pressure.The point at which this
occurs is set and sealed at the
factory and must not be adjusted.
Warning
• Inhalation of aerosols can be
hazardous to health.
• Where applicable use a de-
vice in order to avoid or
reduce aerosols production,
e.g., a shield covering the
nozzle.
• For protection against aero-
sols use a respiratory mask
of class FFP 2 or higher.
2 Description
2.1 Purpose This high-pressure cleaner has
been designed for professional
use in
– Agriculture
– Industry
– Transport industry
– Automotive
– Municipal Facilities
– Janitorial
– Construction
– Food Industry
etc.
Chapter 5 describes the use of
the high-pressure cleaner for
various cleaning jobs.
Always use the cleaner as de-
scribed in these operating in-
structions. Any other use may
damage the cleaner or the sur-
face to be cleaned or may result
in severe injury to persons.

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NEPTUNE 5 / 7 / 8
2.2 Operating elements See fold-out page at front of these
operating instructions.
1 Spray lance
2 Spray lance storage
3 Control panel
4 Crank handle for
High pressure hose reel
(Neptune ..X)1)
Cord reel (Neptune ..X2)1)
5 Fuel level gauge
6 Tank filler for fuel
7 Receptacle for service
crane and lifting ring1)
8 Top cover release
9 Service door release
10 Crank handle for
High pressure hose reel
(Neptune ..X2)1)
11 High pressure hose connec-
tion for machines without
hose reel
12 Main switch ON/OFF - cold
water/hot water
13 Display (Temperature or
Codes)
14 Temperature control
15 Low fuel indicator
16 Low Nilfisk-Alto AntiStone
(Anti-Scale) indicator
17 Service interval due/expired
18 Pump oil low
19 Detergent metering knob
20 Pressure gauge
21 Power ON
22 Castor with parking brake
23 Water supply connection
24 Tank filler for anti-freeze
25 Tank filler for Nilfisk-Alto
Anti-Scale
26 Canister for detergent B1)
27 High pressure hose reel
(Neptune ..X)1)
28 Power cord reel
(Neptune ..X2)1)
29 Tank filler for detergent A
30 Grip for top cover
3 Before starting the cleaner
3.1 Transport and assembly the machine by hand from the
pallet. Due to the weight this
work should be done by at least
three persons.
CAUTION!
Do not hold the plastic tank to lift
the machine as it could become
detached from the frame.
The best places to hold the ma-
chine are
– on the handle
– on the frame between
the front wheels and the guide
rollers.
Every fuel-burning appliance, such
as pressure washers, depends
upon a proper mix of fuel and air
(by weight) for proper combustion.
Therefore some adjustment of the
air supply to the burner may be nec-
essary to take account of altitude
and the resulting air pressure.This
is true whether your fuel is ‘Natural
gas’, Propane or Diesel.
Your Nilfisk-Alto hot water pressure
washer was thoroughly tested and
adjusted for optimum performance
before it left our factory.The factory
is located at approximately 200m
(650 ft) above sea level, and the
combustion settings are optimal for
that elevation.
If your location is higher than
1200m (3900 ft) above sea level,
your burner may require re-ad-
justment for proper performance
and best fuel economy. Contact
your Dealer or Nilfisk-Alto for
assistance.
3.2 Set the brake 1. Before using the cleaner for
the first time, check it carefully
for any faults or damage.
2. Run the machine only when it
is in perfect working condition.
3. Set the brake.
1. The safest way to lift
the machine is to use a fork-lift
truck The arrows in the illustra-
tion indicate the best places to
position the fork.
2. It is also possible to lift

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NEPTUNE 5 / 7 / 8
3.5 Fill up tank for Nilfisk-
Alto AntiStone (Anti-
Scale) indicator
1. Fill up Nilfisk-Alto Anti-Stone
(Anti-Scale)/water softener res-
ervoir with the sample bottle
provided. Nilfisk-Alto AntiStone
(Anti-Scale) prevents any depos-
its of scale and acts at the same
time as a corrosion inhibitor.
For compatibility reasons, use only
the tested Nilfisk-Alto AntiStone
(Anti-Scale) which is available as a
six-pack of 1 liter bottles by ordering
3.4 Fill up detergent tanks 1. Fill up detergent tanks (A) and
(B) with prediluted detergent.
Capacity see chapter 9.3 Techni-
cal Data
3.3 Install Crank handle
for high pressure hose
reel/cord reel
1. Pull cap of crank in arrow direc-
tion.
2. Align tabs on crank with slot in
axle.
3. Put crank on axle of high pres-
sure hose reel/cord reel.
4. Fix crank by pushing the cap.
part number 8466.
3.6 Adjusting the Nilfisk-
Alto AntiStone (Anti-
Scale) device
The Nilfisk-Alto AntiStone device is
set at the factory to a water hardness
of class 2. Adjustment:
1. Open cabinet (A) and service
door (B).
2. Only on ..X2 models: remove
crank.
3. Measure the water hardness or
ask your water supply company.
4. Set the adjusting knob to re-
quired position.
B
A
0
1
2
3
4
0
1
2
3
4
0
1
2
3
4
A
B
mg/l Grains O dH °e °f ppm Ca Description Setting
NEPTUNE 5 NEPTUNE 7/8
0-17 0-1 0-7 0-8,8 0-12,5 0-50 Soft 0 0
17-60 1,1-3,5 Slightly Hard 1 1-2
60-128 3,6-7,5 7-14 8,8-17,5 12,5-25,1 51-150
Moderately Hard 2 2-3
128-180 7,6-10,5 14-21 17,5-26,3 25,1-37,6 151-300 Hard 3 3-4
>180 >10,5 >21 >26,3 >37,6 >300 Very Hard 4 4

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NEPTUNE 5 / 7 / 8
3.7 Fill up fuel tank With the machine cold, turned
off and disconnected from power
supply:
1. Fill fuel tank from a clean con-
tainer with a fresh fuel, heat-
ing oil, DIN 51603-1 (without
bio diesel) or Diesel EN 590
(Diesel with bio diesel content
up to 7%).
Diesel according to EN 590 (up
to 7% bio diesel) can be used
with the following restrictions:
Maximum storage time in High
Pressure Cleaner diesel tank: 1
month.
Diesel stored externally more
than 6 month is not allowed to
be filled into Nilfisk-ALTO High
Pressure Cleaners.
Diesel EN 590 is not recom-
mended for use in HPW's below
0 °C.
Diesel EN 590 exposed to the
surroundings must not be used.
The fuel must be free from con-
tamination.
Tank capacity see chapter 9.3
Technical data.
NOTE!
At temperatures below 8°C
(46°F), the fuel oil begins to so-
lidify (paraffin precipitation).This
can lead to difficulties in starting
the burner. Before the winter
months it is recommended that
a fuel conditioner/stabilizer be
added (available from the fuel
oil trade).
1. Connect the high pressure
hose quick connector to the
high pressure nipple (A) lo-
cated at the hose reel axle.
2. Place the high pressure hose
into the hose guide (B) and
ritain it with the clip.
3. Release the brake (C) on the
hose reel and wind up the
high pressure hose.
A
B
C
3.8Connecting the high
pressure hose
3.8.1 Machines with high
pressure hose reel1)
3.8.2 Machines without high
pressure hose reel
1. Connect the high pressure
hose quick connector to the
high pressure nipple located
at right rear of machine above
chemical tank.

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1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
3.10 Electrical connection
3.11 Antifreeze - before first
use
The machine is flushed with anti-
freeze at the factory to protect it
against freezin; this mixture (ap-
prox. 5 l) may be captured in a
suitable container for reuse.
CAUTION!
230 V / 400 V ?
(220 V / 440 V ?)
Some models have tha ability to
be used on either 230 Volt or a
440 Volt power supply. On these
models confirm that the voltage
selector switch is in the proper
position to match the power
supply. Otherwise damage to
machines electrical components
may occur.
CAUTION!
When using a cord reel:
1. Release brake of the cord
reel.
2. Unwind the cord completely.
CAUTION!
The cleaner should only be con-
nected to a correctly installed
electrical supply.
1. Observe safety instructions in
chapter 1.
2. Insert the plug into the electri-
cal socket.
NOTE!
See chapter 9.3 Technical Data
for required quantity of water and
water pressure.
In the case of poor water quality
(sand, etc.), it is recommended
that an inlet water filter be in-
stalled.
Water supply hose should be
a reinforced hose and have a
minimum inside diameter of 3/4"
(19 mm).
400V 400V
230V 230V
400V
400V
230V
230V
3.9 Connecting the water
supply
1. Attach quick connect adapter
found with Owners Manual to
the water supply hose.
2. Rinse the water supply hose
briefly in order to prevent sand
an other dirt particles entering
into the machine.
3. Attach water supply hose with
adapter to inlet quick connec-
tor.
4. Open water supply faucet.

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NEPTUNE 5 / 7 / 8
4 Control / Operation
4.1 Connections
4.1.1 Connecting the spray
lance to the spray gun
1. Pull the blue quick-release
grip (A) of the spray gun for-
wards and lock it by turning it
to the left.
2. Insert the nipple of the spray
lance (C) into the quick-re-
lease connection and turn the
blue quick-release grip to the
right (B).
3. Pull the spray lance (or other
accessory) forwards to check
that it is securely attached to
the spray gun.
NOTE!
Always remove any dirt from
the nipple before connecting the
spray lance to the spray gun.
A
B
C
4.2 Switching on the
cleaner
4.2.1 Cold water operation /
Hot water operation (up
to 100°C)
1. Turn the main switch to posi-
tion (cold water).
Control electronics accomplishes
a self check.
The Display shows for approx. 1
second „---“.
The motor starts.
is ON.
2. Turn the main switch to posi-
tion (hot water).
3. Select temperature.
4. Unlock the spray gun and
squeeze trigger.
5. The oil burner will light.
6. Release trigger and lock the
spray gun when not in use.
NOTE!
The cleaner switches off auto-
matically twenty seconds after
the spray gun has been closed.To
start the cleaner again, squeeze
the trigger and the machine will
start automatically.
0
I
M

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Original instruction
NEPTUNE 5 / 7 / 8
1. Open cabinet (and service door
if desired - see chapter 3.6, Step
1+2).
2. Turn the twist grip on the safety
control block all the way to the left
(counter-clockwise-direction).
3. Turn the main switch to position
.
4. Select temperature (over 100°C
(212°F)).
For special applications: replace the
standard nozzle with the steam spray
nozzle (accessory).
4.3 Pressure regulation
(Tornado Lance)
1. Turn the twist grip on the spray
unit:
– High pressure =
clockwise (+) for high pres-
sure
– Low pressure =
counter-clockwise (–) for low
pressure.
4.2.2 Steam operation (over
100°C (212°F))
BAR
4.5 Using cleaning agents 1. Select desired detergent (A)
or (B) and amount by turning
the knob to desired percent-
age.
2. Spray the object to be cleaned.
3. Allow the cleaning agent to
work, depending on the de-
gree of soiling. Then rinse off
with high pressure.
4.4 Pressure regulation
(VarioPress Gun)1)
1. Turn the twist grip on the spray
unit:
Water volume
(–) (+)
min. max.
For special applications such as
disinfection, the exact detergent
concentration has to be deter-
mined by using a graduated
measuring container. For water
outlet volume of the machine see
chapter 9.3 technical data.

CAUTION!
Never allow cleaning agent
to dry on the surface to be
cleaned. The surface may be
damaged.
The percentage shown in the
illustration are only approximate
data.
5%
ca. ca.
3%
5%
3%
1%1%
0
1
2
3
4
AB

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NEPTUNE 5 / 7 / 8
5 Applications and methods
Efficient high pressure cleaning is achieved by following a few guide-
lines, combined with your own personal experience of specific clean-
ing tasks. Accessories and detergents, when correctly chosen, can
increase the efficiency of your pressure washer. Here is some basic
information about cleaning.
5.1.1 Soaking Encrusted or thick layers of dirt can be loosened or softened up by a
period of soaking. This is for example an ideal method within agricul-
ture – for example, within pig sties.The ideal soaking method can be
achieved by using foam or simple alkaline detergent. Let the product
lie on the dirty surfaces for about 30 minutes before pressure wash-
ing.The result will be a much quicker high pressure cleaning process.
5.1 Techniques
5.1.2 Detergent and Foam Foam or detergent should be applied onto dry surfaces so that the
chemical product is in direct contact with the dirt. Detergents are ap-
plied from bottom to top, for example on a automobile bodywork, in
order to avoid “super clean” areas, where the detergent may collect
in higher concentrations and streams downwards. Let the detergent
work for several minutes before rinsing before rinsing and never let
it dry on the surface being cleaned.
5.1.3 Temperature Detergents are more effective at higher temperatures. Greases, oils
and fats can be broken down more effectively at higher temperatures
also.Proteins can be cleaned at temperatures of around 60°C (140°F).
Oils and traffic film around 70°C (158°F), and grease can be cleaned
at 80°-90°C (176-194°F).
5.1.4 Mechanical Effect In order to break down tough layers of dirt, additional mechanical
effect may be required. Special lances and rotary or wash brushes
offer this supplementary effect that cuts through dirt.
5.1.5 High Water Flow or
High Pressure
High pressure is not always the best solution and may also damage
surfaces. The cleaning effect also depends upon water flow. Pres-
sure levels of around 100 bar (1450 psi) may be sufficient for vehicle
cleaning (in association with hot water) and higher flow levels give
the ability to rinse and flush away large amounts of dirt easily.

12
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NEPTUNE 5 / 7 / 8
5.2 Some typical cleaning tasks
5.2.1 Agriculture
Task Accessories Method
Stables
Pig Pens, Sties
Cleaning of walls,
floors and equip-
ment
Disinfectant
Chemical Foam Injec-
tors
Foam lance
Powerspeed lance
Floor Cleaner
Detergents
Universal
Alkafoam
Disinfectant
DES 3000
1. Soaking – apply foam to all surfaces (bottom to top)
and wait for approx. 30 minutes.
2. Remove the dirt from surfaces with the high pressure
lance or chosen accessory. Again, clean from bottom
to top on vertical surfaces.
3. To flush away large quantities of dirt, change to low
pressure mode and use the higher flow to push away
the dirt.
4. Use recommended disinfectant products and methods
to ensure hygiene. Apply DES 3000 disinfectant once
the surfaces are perfectly clean.
Machinery
Tractors
ploughs etc.
Detergent injection
Powerspeed lances
Curved lances and un-
derchassis washers
Brushes
1. Apply detergent to vehicle or equipment surfaces in
order to soften up dirt and grime. Apply from bottom
to top.
2. Proceed with cleaning using the high pressure lance.
Clean again from bottom to top. Use accessories to
clean in difficult to reach places.
3. Clean fragile areas such as motors, rubber at lower
pressure levels to avoid damage.
5.2.2 Vehicle
Task Accessories Method
Vehicle bodywork Standard lance
Detergent injection
Curved lances and un-
derchassis washers
brushes
Detergents
Aktive Shampoo
Aktive Foam
Sapphire
Super Plus
Aktive Wax
Allosil
RimTop
1. Apply detergent to vehicle or equipment surfaces in
order to soften up dirt and grime. Apply from bottom
to top. In cases of particularly dirty vehicles, pre-spray
with a product such as Allosil in order to remove traces
of insects etc, then rinse at low pressure and apply
normal car cleaning detergent. Let detergents settle
for 5 minutes before cleaning off.Metallic surfaces can
be cleaned using RimTop.
2. Proceed with cleaning using the high pressure lance.
Clean again from bottom to top. Use accessories to
clean in difficult to reach places. Use brushes in order
to add a mechanical cleaning effect. Short lances can
help for cleaning of motors and wheel arches.Curved
lances or undercarriage washers can be valuable for
the cleaning of car underchassis and wheel arches.
3. Clean fragile areas such as motors, rubber at lower
pressure levels to avoid damage.
4. Apply a liquid wax using the pressure washer in order
to protect the bodywork from pollution.

13
english
1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
5.2.3 Buildings and Equipment
These are merely several examples of cleaning tasks that can be solved by a pressure washer in asso-
ciation with accessories and detergents. Each cleaning task is different. Please consult your local dealer
or Nilfisk-Alto representative in order to discuss the best solution for your own cleaning tasks.
Task Accessories Method
General surfaces
Metallic equipment
Foam injectors Stand-
ard lance
Curved lances
Tank cleaning
head
Detergents
Intensive
J25 Multi
Combi Aktive
Alkafoam
Disinfectant
DES 3000
1. Apply thick foam over the surfaces to be cleaned. Apply
on dry surfaces. Apply from top to bottom on vertical
surfaces. Let the foam act for up to 30 minutes for the
optimal effect.
2. Proceed with cleaning using the high pressure lance.
Use applicable accessories. Use high pressure to
dislodge large amounts of incrusted dirt or grime.
Use lower pressure and high water volume in order
to rapidly flush away loose dirt and rinse surfaces.
3. Apply DES 3000 disinfectant once the surfaces are
perfectly clean.
Areas covered by amounts of loose dirt, such as animal
remains in slaughterhouses, can be removed by using
high water flow to flush away the dirt to evacuation pits
or drains.
Tank cleaning heads can be used to clean barrels, vats,
mixing tanks etc. Cleaning heads may be hydraulically or
electrically powered and give the possibility for automatic
cleaning without a constant user.
Rusted or dam-
ages surfaces prior
to treatment
Wet Sandblasting
equipment
1. Connect the sandblasting lance to the pressure
washer and place the suction tube in the sand.
2. Always wear protective equipment during sandblast-
ing.
3. Spray the surfaces to be treated with the mix of water
and sand. Rust, paint etc will be stripped off.

14
english
1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
6 After using the cleaner
6.1 Switching off the
cleaner
1. Turn the main switch to posi-
tion „OFF“.
2. Turn off water supply at faucet.
3. Squeeze the spray gun trigger
until the pressure has bled off.
4. Slide trigger lock to the locked
position.
6.2 Disconnecting supply
lines
1. Turn the main switch to posi-
tion „OFF“.
2. Turn off water supply at faucet.
3. Squeeze the spray gun trigger
until the pressure has bled off.
4. Slide trigger lock to the locked
position.
6.3 Rolling up the electrical
lead and storing
accessories
Risk of tripping!
To prevent accidents, always
carefully roll up the power cord.
Machines with hose and/or cord
reel:
1. Wind up the power cord as il-
lustrated with the plug located
in the center of the cord reel.
2. Wind up the high pressure
hose as illustrated.
3. Place the spray lance into the
spray lance storage.
5. Remove the water supply
hose from the cleaner.
6. Remove power cord plug from
the electrical supply.
6.4 Storing the cleaner
(below 0°C (32°F))
Store the cleaner in a dry heated
location to protect against freez-
ing or protect per below instruc-
tions:
1. Remove the water supply
hose from the cleaner.
2. Remove the spray lance.
3. Switch on the cleaner with the
main switch in position .
4. Squeeze trigger of the spray
gun.
5. Gradually pour antifreeze (ap-
prox. 5 litres) into the water
tank (A).
6. While the pump is pulling the
mixture from the water tank,
squeeze and release the trig-
ger two or three times.
7. The machine is protected
against freezing when anti-
freeze mixture emerges from
the spray gun.
8. Lock the safety catch on the
spray gun.
9. Switch off the cleaner.
10.To avoid any possible dam-
age, store the cleaner tempo-
rarily in a heated room before
using it again.
11.When the machine is put into
service again, the antifreeze
solution can be collected and
stored for future use.
0
I
M
A

15
english
1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
7 Maintenance
7.1 Maintenance Schedule
7.2 Maintenance work
7.2.1 Water filters
Water filters are fitted at the water
and pump inlets to prevent large
particles of dirt from entering into
the system.
1. Unscrew quick coupling.
2. Remove filter with tool and
clean it.
3. Also clean filter at pump inlet.
Weekly
NEPTUNE 5/8only:
After the first 50
operating hours
Every six
months or
500 operating
hours
As
required
7.2.1 Water filters 
7.2.2 Oil filter 
7.2.3 Checking the pump oil quality 
7.2.4 Changing the pump oil 
7.2.5 Emptying the fuel oil tank 
7.2.6 Flame Sensor 
7.2.2 Oil filter 1. Clean filter:
Unscrew Filter cap (1)
2. Clean/replace oil filter.
3. Properly dispose of filter and
any solvents.
1
2
NEPTUNE 5 NEPTUNE 7 NEPTUNE 8

16
english
1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
7.2.4 Changing the pump oil 1. Unscrew the oil drain plug (A)
and drain oil into a suitable
container.
2. Check that the drain plug
gasket is in place and reinstall
drain plug.
3. Fill pump with proper grade
and amount of oil.
Oil grade and capacity see
chapter ‘9.3 Technical Data’.
7.2.3 Checking the pump oil
quality
1. Check color of pump oil.
If the oil has a grey or white
shade, change the oil (see
chapter 7.2.4)
2. Top off oil level with fresh oil
if necessary.
Oil type see chapter 9.3 Tech-
nical Data.
7.2.6 Flame sensor 1. Remove the sensor and clean
with a soft cloth.
2. Confirm that the sensor is
correctly seated when rein-
stalling.
7.2.5 Emptying the fuel oil
tank
1. Prepare a container which
is capable of containing the
amount of fuel remaining in
the tank.
2. Place drain channel beneath
the drain plug.
3. Remove the drain plug and
drain the fuel into the pre-
pared container carefully not
to spill fuel oil.
4. Check that the drain plug
gasket is in place and reinstall
drain plug.
5. Check tank and plug for
leaks.
A
A
NEPTUNE 7 NEPTUNE 5 / 8

17
english
1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
Indication
on Display Cause Remedy
FLF
FLF > Flow sensor fault Contact Nilfisk-Alto Service
Cold water operation possible
FLO
FLO > Water supply turned off or inadequate supply
to machine
• Required volume flow and pressure see
chapter 9.3 Technical Data
> Detergent tank empty • Fill detergent tank or set detergent me-
tering to „OFF“
> Pressure regulation on the safety control
block or VarioPress-lance1) set to low water
volume
• Turn the twist grip on safety control block
or VarioPress-lance1) to higher water/
pressure volume (see chapter 4.4)
> Machine scaled Contact Nilfisk-Alto Service
Fue
Fue >Fuel shortage • Fill fuel tank
Cold water operation possible
Hop
Hop > Motor overheated • Turn main switch in position „OFF“, let
machine cool down
• Remove extension cord, if being used.
• Possible phase failure; have electrical
connections checked
HOS
HOS > Machine overheated Contact Nilfisk-Alto Service
LEA
LEA
> Leakage or inadmissible operating condition
by short-time operation
• After three times of short-time operation
the machine switches off. To reset: Turn
main switch to position “OFF“, then start
again. Keep trigger squeezed for longer
than 3 seconds. If a leak occurs in the
hose and gun and causes the machine
to start and stop briefly 3 times, then the
machine will switch off.
> Spray gun leaking • Repair Spray gun
> High pressure hose, coupling or line system
leaking
• Replace high-pressure hose, retighten
screw fittings
> Detergent tank empty • Fill detergent tank or set detergent me-
tering to „OFF“
> Water inlet filter dirty • Clean filter (see chapter 7.2.1)
> High-pressure pump drawing in air • Repair leaks
LHE
LHE > Flame sensor sooted • Clean flame sensor (see chapter
7.2.6).
> Ignition or fuel system failure Contact Nilfisk-Alto Service
Cold water operation possible
LHL
LHL > Burner failure Contact Nilfisk-Alto Service
Cold water operation possible
POL
POL > Pump oil low
• Fill to proper level (see chapter 7.2.3)
SEC
SEC > Temperature sensor damaged Contact Nilfisk-Alto Service
Cold water operation possible
SEO
SEO > Temperature sensor damaged Contact Nilfisk-Alto Service
Cold water operation possible
UPC
UPC > Microprocessor failure Contact Nilfisk-Alto Service
8Troubleshooting
8.1 Indications on Display

18
english
1) Options / model variants
Original instruction
NEPTUNE 5 / 7 / 8
8.2 Indication lights on control panel
8.3 Other Faults
Indication light Cause Remedy
flashing >see FLO •see FLO
ON > Low fuel level • Fill fuel tank
Cold water operation possible
> Low Nilfisk-Alto AntiStone (Anti-
Scale) level
• Fill Nilfisk-Alto AntiStone (Anti-Scale)
tank
flashing > Service interval: Service due in 20
hours
Contact Nilfisk-Alto Service
ON > Service interval expired Contact Nilfisk-Alto Service
ON > Pump oil low • Fill to proper level
Fault Cause Remedy
not ON > Power cord not properly
connected to power supply
• Check power cord connetction
• Check fuse (see chapter 9.3 Technical
Data)
Pressure too low > High pressure nozzle worn
out
• Replace nozzle
> Pressure regulation set to low
pressure or VarioPress-lance
set to low water volume.
• Turn the twist grip on safety control block
clockwise (+) or set VarioPress-lance to
higher water volume (see chapter 4.4)
Machine is running with pulsating
pressure and makes knocking
noise
> Pump has drawn in air due to
detergent tank being empty
• Close detergent valve. Remove lance from
gun. Operate spray gun and let machine run
until air in pump is gone and the machine is
running normally/calm again.
No detergents drawn in > Detergent tank empty • Fill detergent tank
> Dirt in detergent tank • Clean detergent tank
> Suction valve at cleaning
agent inlet soiled
• Remove suction valve and clean or replace
Burner soots > fuel contamination Contact Nilfisk-Alto Service
> Burner sooted or adjustment
incorrect
9 Further information
9.1 Recycling the cleaner Make the old cleaner unusable
immediately.
1. Unplug the cleaner and
cut the power cord.
Do not discard of electrical ap-
pliances with household waste.
As specified in European Direc-
tive 2002/96/EC on old electrical and elec-
tronic appliances, used electrical goods
must be collected separately and recycled
ecologically.
Contact your local authorities or your near-
est dealer for further information.
9.2 Guarantee Our general conditions of busi-
ness are applicable with regard
to the guarantee. Subject to
change as a result of technical
advances.
The guarantee is invalidated if the machine
is not operated in accordance with these
instructions or otherwise abused. The
guarantee is invalidated if the machine is
not serviced as described.