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Malfunctions often have simple causes that you can
remedy yourself using the following overview. When in
Error
The engine does not
start.
The engine has insuffi-
cient power.
High-pressure pump not
building up pressure.
Strong pressure fluctua-
tions.
Device leaking.
High-pressure hose or
connections leaking.
The high-pressure pump
knocks.
Troubleshooting guide
Cause
Various causes possible.
Various causes possible.
The engine speed is too low.
The black jet nozzle (SOAP) is installed
on the spray lance.
The white, green, yellow or red jet nozzle
is damaged, blocked or washed out.
The water sieve is dirty.
Air in the system.
The water supply quantity is too low.
Supply lines to high-pressure pump leak-
ing or clogged.
The jet nozzle is dirty.
The water supply quantity is too low.
Minor leakage due to technical reasons. 1. Minor leakage of the device can occur due
Major leakage.
The high-pressure hose is damaged.
The sealing rings of the high-pressure
hose are damaged or worn.
The high-pressure gun sealing ring is
damaged or worn.
The union nut on the water spigot is
loose.
The supply lines to the high-pressure
pump are leaking.
Air in the system.
doubt, or in the case of malfunctions not mentioned
here, please contact your authorized Customer Service.
Rectification
1. See the operating instructions of the en-
gine.
1. See the operating instructions of the en-
gine.
1. Check the operating speed of the engine
and correct if necessary, see the operating
instructions for the engine.
1. Replace the black jet nozzle (SOAP) with
the white, green, yellow or red jet nozzle,
see chapter Changing the jet nozzle.
1. Clean the white, green, yellow or red jet
nozzle, see chapter Cleaning the jet noz-
zle (if necessary)or replace it.
1. Clean the device water sieve, see chapter
Cleaning the water sieve (monthly).
1. Vent the device, see chapter Vent the de-
vice.
1. Open the water tap completely.
2. Check the water supply quantity and in-
crease if necessary, see chapter Technical
data.
1. Check the supply lines to the high-pressure
pump for blockages, damage and leaks
and replace if necessary.
1. Clean the jet nozzle, see chapter Cleaning
the jet nozzle (if necessary).
1. Open the water tap completely.
2. Clean the device water sieve, see chapter
Cleaning the water sieve (monthly).
3. Check the water supply quantity and in-
crease if necessary, see chapter Technical
data.
to technical reasons and is not a cause for
concern.
1. Contact the authorized Customer Service.
1. Shut the device down immediately and re-
place the high-pressure hose.
1. Replace the sealing rings on the high-pres-
sure hose, see chapter Replacing the
sealing rings on the high-pressure hose
and high-pressure gun (if necessary).
1. Replace the high-pressure gun sealing ring
with a new one, see chapter Replacing the
sealing rings on the high-pressure hose
and high-pressure gun (if necessary).
1. Hand-tighten the union nut on the water
spigot with an open-end wrench, see chap-
ter Installing the coupling plug on the water
spigot.
1. Check the supply lines to the high-pressure
pump for leaks and replace if necessary.
1. Vent the device, see chapter Vent the de-
vice.
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