Operation Manual
POSEIDON 4
10
1)
 Options / model variants
Original instructions
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 continue to use the 
cleaner if the mains power lead 
or high-pressure hose is dam-
aged.
Ensure adequate air circulation. 
Do not cover the cleaner or op-
erate it in inadequately ventilat-
ed rooms!
Never operate the cleaner with-
out water. Even brief shortages 
of water result in severe damage 
to the pump seals.
Control / Operation
CAUTION!
Unsuitable extension leads can 
represent a source of danger. 
Always unwind cord from the 
reels completely to prevent the 
power cord overheating.
Plugs and connectors of mains 
power leads must be at least 
splash water-proof. 
When using an extension cord, 
check the minimum cross-sec-
tions of the cable:
Cable length
m
Cross section
<16 A <25 A
up to 20 m ø1.5mm² ø2.5mm²
20 to 50 m ø2.5mm² ø4.0mm²
Do not damage the mains power 
lead (e.g. by driving over it, pull-
ing or crushing it).
Disconnect the power cord by 
pulling the plug only (do not pull 
or tug the power cord).
CAUTION!
Never spray electrical equipment 
with water: danger for persons, 
risk of short-circuiting.
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 Ω. If in doubt ask your local 
electricity supplier.
Storing the cleaner (below 
0° C)
Store the cleaner where it will 
not be exposed to frost!
If the high-pressure cleaner is 
stored in a room with tempera-
tures around or below 0° C, anti-
freeze should be drawn into the 
pump beforehand:
Maintenance and repair
The oil filling is permanent and 
rated for the full service life of 
the machine.
To achieve a long life and avoid 
problems with dirt in the gun, the 
coupling and nipple have to be 
kept clean.
The nipple on the lance has to 
be handled with care to prevent 
leaks.
CAUTION!
Always remove the plug from the 
mains plug socket before clean-
ing or carrying out maintenance 
work on the cleaner.
Carry out only the maintenance 
operations described in the op-
erating instructions. Use only 
original Nilfisk-Alto spare parts.
Do not make any technical mod-
ifications to the high-pressure 
cleaner.
Ensure that the machine is 
regularly serviced by Authorised 
Nilfisk-Alto dealers in accordance 
with the maintenance plan. 
Failure to do so will invalidate 
the warranty.
CAUTION!
High-pressure hoses, fittings 
and couplings are important for 
the safety of the cleaner. Use 
only high-pressure parts ap-
proved by the manufacturer!
The mains power lead must not 
differ from the version specified 
by the manufacturer and may 
only be changed by an electri-
cian.
Please contact the Nilfisk-Alto 
service department or an au-
thorised specialist work-shop for 
all other maintenance or repair 
work!
Testing
The cleaner conforms to the 
German „Guidelines for Liquid 
Spray Jet Devices“. The high-
pressure cleaner must be sub-
jected to a safety examination 
in accordance with the „Acci-
dent Prevention Regulations for 
Working with Liquid Spray Jet 
Devices (BGV A3)“ 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 cur-
rent measurement and a func-
tion test must be carried out. Our 
after-sales service technicians 
are at your disposal as author-
ised 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 associa-
tion of employers’ liability insur-
ances.










