Nilfisk-Advance MH 5M User manual

MH 5M -
Instructions for use
107140337 E (09. 2015)
psi
bar

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bar
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bar
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3
5
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30
24
25
23
27
22
21
28
26
6
11
10
8
9
12
14
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2
1

3
1) Options / model variants
Original instructions
Contents
1 Safety instructions ...........................................................................................................................4
2 Description........................................................................................................................................5
2.1 Purpose...................................................................................................................................5
2.2 Operating elements.................................................................................................................5
3 Before starting the cleaner..............................................................................................................6
3.1 Transport and assembly..........................................................................................................6
3.2 Set the brake...........................................................................................................................6
3.3 Install Crank handle for high pressure hose reel/cord reel......................................................7
3.4 Fill up detergent tanks.............................................................................................................7
3.5 Fill up tank for Nilfisk AntiStone (Anti-Scale) ..........................................................................7
3.6 Antiscale..................................................................................................................................7
3.7 Fill up fuel tank ........................................................................................................................8
3.8 Connecting the high pressure hose.........................................................................................8
3.9 Connecting the water supply...................................................................................................9
3.10 Electrical connection ...............................................................................................................9
3.11 Antifreeze - before first use .....................................................................................................9
4 Control / Operation...........................................................................................................................9
4.1 Connections ............................................................................................................................9
4.2 Switching on the cleaner .......................................................................................................10
4.3 Pressure regulation (Tornado Lance)....................................................................................10
4.4 Pressure regulation (VarioPress Gun)1)................................................................................. 11
4.5 Using cleaning agents........................................................................................................... 11
5 Applications and methods ............................................................................................................12
5.1 Techniques ............................................................................................................................12
5.2 Some typical cleaning tasks..................................................................................................13
6 After using the cleaner ..................................................................................................................15
6.1 Switching off the cleaner .......................................................................................................15
6.2 Disconnecting supply lines....................................................................................................15
6.3 Rolling up the electrical cord and storing accessories ..........................................................15
6.4 Storing the cleaner (below 0°C (32°F)) .................................................................................15
7 Maintenance....................................................................................................................................16
7.1 Maintenance Schedule..........................................................................................................16
7.2 Maintenance work .................................................................................................................16
8 Troubleshooting .............................................................................................................................18
8.1 Indications on Display ...........................................................................................................18
8.2 Indication lights on control panel...........................................................................................19
8.3 Other Faults...........................................................................................................................19
9 Further information ........................................................................................................................20
9.1 Recycling the cleaner............................................................................................................20
9.2 Guarantee .............................................................................................................................20
9.3 EU Declaration of Conformity................................................................................................21
9.4 Technical Data.......................................................................................................................22

41) Options / model variants
Original instructions
1 Safety instructions
Symbols used to mark
instructions
Before using the
high-pressure
cleaner, be sure to
also read the en-
closed operating in-
structions and keep
them within reach at all times.
Safety instruc-
tions in these op-
erating instruc-
tions which must
be observed to
prevent risks to
persons are marked with this
danger symbol.
This symbol is
used to mark safe-
ty instructions that
must be observed
to prevent damage
to the machine and
its performance.
This indi-
cates tips and
instructions to
simplify work
and to ensure safe operation.
Operations
marked with
this symbol
should only be
carried out by
Nilfisk Service
Technicians.
High Pressure Washer -
SAFETY INSTRUCTIONS
107141898 D (09-2015)

5
1) Options / model variants
Original instructions
2 Description
2.1 Purpose This high-pressure cleaner has
been designed for professional
use. It can be used for cleaning
agricultural and construction
equipment, stables, vehicles,
rusty surfaces, etc.
The cleaner has not been ap-
proved for cleaning surfaces
which comes into contact with
food.
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.
2.2 Operating elements See page 2 at front of these
operating instructions.
1 Spray lance
2 Spray lance storage
3 Control panel
4 Crank handle for
High pressure hose reel
(MH 5M ..X)1)
Cord reel (MH 5M ..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
(MH 5M ..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 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 Anti-
Scale
26 Canister for detergent B1)
27 High pressure hose reel
(MH 5M ..X)1)
28 Power cord reel
(MH 5M ..X2)1)
29 Tank filler for detergent A
30 Grip for top cover

61) Options / model variants
Original instructions
3 Before starting the cleaner
3.1 Transport and assembly
1. The safest way to lift the ma-
chine is to use a fork-lift truck
The arrows in the illustration
indicate the best places to po-
sition the fork.
2. It is also possible to lift the ma-
chine 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 hot water pressure
washer was thoroughly tested and
adjusted for optimum performance
before it left our factory. The factory
is located at approximately 120m
(390 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-
adjustment for proper perfor-
mance and best fuel economy.
Contact your Dealer or Nilfisk
for assistance.
3.2 Set the brake 1. Before using the cleaner for
the first time, check it care-
fully for any faults or damage.
2. Run the machine only when
it is in perfect working condi-
tion.
3. Set the brake.
4. The slope on which the high
pressure cleaner is placed
must not exceed more than
100in any direction.

7
1) Options / model variants
Original instructions
3.5 Fill up tank for Nilfisk
AntiStone (Anti-Scale)
1. Fill up Nilfisk Anti-Stone (Anti-
Scale)/water softener reser-
voir with the sample bottle
provided. Nilfisk AntiStone
(Anti-Scale) prevents any
deposits of scale and acts at
the same time as a corrosion
inhibitor.
For compatibility reasons, use
only the tested Nilfisk AntiStone
(Anti-Scale) which is available
as a six-pack of 1 liter bottles by
ordering part number 8466.
3.4 Fill up detergent tanks 1. Fill up detergent tanks (A) and
(B) with prediluted detergent.
Capacity see chapter 9.4
Technical Data
3.3 Install Crank handle
for high pressure hose
reel/cord reel
1. Pull cap of crank in arrow
direction.
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.
AB
3.6 Antiscale The Nilfisk Antiscale dosing sys-
tem is set by the factory.
To adjust the water hardness we
recommend that the inlet water
is tested accordingly.
Use the schematic to find the
right dosage of No Scale/anti
stone and water, and add the
mixture to the antiscale tank.
Machine flow L/h Pump size ml/h ˚dH ˚f˚e Dosage
900 35 0-12 0-21,5 0 - 15 1:1 = 17ml/h
900 35 12-30 21,5 - 53,7 15 - 37,5 Pure = 35ml/h
1000 35 0-12 0-21,5 0 - 15 1:1 = 17ml/h
1000 35 12-30 21,5 - 53,7 15 - 37,5 Pure = 35ml/h

81) Options / model variants
Original instructions
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 a bio diesel con-
tent up to 7%).
Diesel according to EN 590
(up to 7% bio diesel) can be
used with the following re-
strictions: Maximum storage
time in high pressure cleaner
diesel tank: 1 month. Diesel
stored externally for more
than 6 months is not allowed
to be filled into Nilfisk high
pressure cleaners. Diesel
EN 590 is not recommended
for use in HPW's at an ambi-
ent temperature below 0°C.
Diesel EN 590 from an open
container must not be used.
NOTE!
The fuel must be free from con-
tamination.
Tank capacity see chapter 9.4
Technical data.
the burner. Before the winter
months it is recommended that
a fuel conditioner/stabilizer be
added (available from the fuel
oil trade).
3.8 Connecting the high
pressure hose
3.8.1 Machines with high
pressure hose reel1)
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.
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.
A
B
C
NOTE!
At temperatures below 8°C
(46°F), the fuel oil begins to so-
lidify (paraffin precipitation). This
can lead to difficulties in starting

9
1) Options / model variants
Original instructions
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 back-
wards.
2. Insert the nipple of the spray
lance (B) into the quick-re-
lease connection and release
it.
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.
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.
A
C
B
3.10 Electrical connection CAUTION!
230 V / 400 V ?
(220 V / 440 V ?)
Some models have the 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.
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.
NOTE!
See chapter 9.4 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).

10 1) Options / model variants
Original instructions
1. Open cabinet (and service door if
desired).
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).
4.2 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.
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))
Beware of hot water and
steam discharge up to
150°C when operating in
steam stage.
NOTE!
The cleaner switches off
automatically twenty seconds after
the spray gun has been closed. To
start the cleaner again, squeeze
the trigger and the machine will
start automatically.

11
1) Options / model variants
Original instructions
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.
The percentage shown in the
illustration are only approximate
data.
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 9.4 technical data.
The use of cleaning agents while
using the steam device will show
a lower percentage and will result
in a lower concentration.
CAUTION!
Never allow cleaning agent
to dry on the surface to be
cleaned. The surface may be
damaged.
5%
ca. ca.
3%
5%
3%
1%1%
0
1
2
3
4
AB
4.4 Pressure regulation
(VarioPress Gun)1)
For safety reasons,
never tie back or
wedge open the
trigger of the spray
gun in open
position during
operation. The trigger must be free
to close when released, thus
interrupting the flow of the water.
1. Turn the twist grip on the
spray unit:
Water volume
(–) (+)
min. max.

12 1) Options / model variants
Original instructions
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.
5 Applications and methods
Efficient high pressure cleaning is achieved by following a few
guidelines, combined with your own personal experience of specific
cleaning 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 washing.
The result will be a much quicker high pressure cleaning process.
5.1 Techniques

13
1) Options / model variants
Original instructions
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
Active Shampoo
Active 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.

14 1) Options / model variants
Original instructions
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 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 Active
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 damag-
es 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.

15
1) Options / model variants
Original instructions
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 fau-
cet.
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 fau-
cet.
3. Squeeze the spray gun trigger
until the pressure has bled off.
6.3 Rolling up the electrical
cord 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.
4. Slide trigger lock to the locked
position.
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.
A

16 1) Options / model variants
Original instructions
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.
Weekly After the first 50
operating hours
Every six
months or
500 operating
hours
As
required
7.2.1 Water filters 
7.2.2 fuel 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 Maintenance of fuel
filter
1. Open hose clips
2. Replace fuel filter
3. Close hose clips
4. Dispose the cleaning solu-
tion/damaged filter in ac-
cordance with the disposal
regulations.

17
1) Options / model variants
Original instructions
7.2.4 Changing the pump oil 1. Unscrew the oil drain plug
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 ‘9.4 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 9.4 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.

18 1) Options / model variants
Original instructions
Indication
on Display Cause Remedy
FLF
FLF > Flow sensor fault Contact Nilfisk Service
Cold water operation possible
FLO
FLO >Water supply turned off or inadequate supply
to machine
• Required volume flow and pressure see
chapter 9.4 Technical Data
> Detergent tank empty • Fill detergent tank or set detergent me-
tering to „OFF“
>Pressure regulation on the safety control
block set to low water volume
•Turn the twist grip on safety control block
to higher water pressure/volume
> Machine scaled Contact Nilfisk 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 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 Service
Cold water operation possible
LHL
LHL > Burner failure Contact Nilfisk 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 Service
Cold water operation possible
SEO
SEO > Temperature sensor damaged Contact Nilfisk Service
Cold water operation possible
UPC
UPC > Microprocessor failure Contact Nilfisk Service
8 Troubleshooting
8.1 Indications on Display

19
1) Options / model variants
Original instructions
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 AntiStone (Anti-
Scale) level
• Fill Nilfisk AntiStone (Anti-Scale)
tank
flashing > Service interval: Service due
in 20 hours
Contact Nilfisk Service
ON > Service interval expired Contact Nilfisk 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 9.4 Technical
Data)
Pressure too low > High pressure nozzle worn
out
• Replace nozzle
>Pressure regulation set to low
pressure
•Turn the twist grip on safety control
block clockwise (+)
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 Service
> Burner sooted or adjustment
incorrect

20 1) Options / model variants
Original instructions
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 electronic appliances, used
electrical goods must be col-
lected separately and recycled
ecologically.
Contact your local authorities or
your nearest dealer for further
information.
9.2 Guarantee Our general conditions of
business are applicable with
regard to the guarantee.
Unauthorised modifications
to the appliance, the use of
incorrect accessories, spare
parts and cleaning chemicals in
addition to using the appliance
in a way other than for the
intended purpose exempt the
manufacturer from any liability
for the resulting damage.
US only:
This warranty is in effect from
the first day of purchase by the
end user.
Each machine will have one
(1) year coverage, from date
of purchase by the end user,
covering parts found defective
due to faulty components,
materials and/or bad
workmanship. Not included in
this warranty coverage are parts
found defective due to:
- Normal wear and tear (such
as seals, valves, pistons,
bearings, etc.)
- Machine working under ab-
normal conditions.
- Machines being misused.
- Machines being repaired or
tampered with by unauthor-
ized person(s).
- The use of parts other than
Nilfisk Cleaning Systems,
Inc. original spare parts and/
or accessories.
The burner coil on all Nilfisk
Cleaning Systems, Inc. hot
water/steam cleaners is under
warranty for two (2) years
against defects, and the high
pressure hose is covered for an
initial 30 days, under the same
conditions described above.
Nilfisk Cleaning Systems, Inc.
will cover labor by an authorized
Nilfisk CSI Dealer for a 12-month
period after the date of purchase
of the machine by the end user.
No other costs, other than laid
out in this warranty program, will
be covered by the warranty.
Dated, End-User proof of
purchase must be submitted
with any claim for Warranty
Service.