Karcher HD3-7-22-4S User Manual [en, es, fr]
HD 3.5/30-4S Ea
HD 3.7/22-4S Eg
www.kaercher.com
5.961-344.0 09/07
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English
Environmental protection
The packaging material can be
recycled. Please do not place
the packaging into the ordinary
refuse for disposal, but arrange
for the proper recycling.
Old appliances contain valuable
materials that can be recycled.
Please arrange for the proper
recycling of old appliances.
Batteries, oil, and similar
substances must not enter the
environment. Please dispose of
your old appliances using
appropriate collection systems.
Caution!
Follow the maintenance instruc-
tions specified in the manual
This machine has been designed for
use with cleaning detergents by the
manufacturer. The use of other
cleaning detergents may affect the
operation of the machine and void the
warranty.
IMPORTANT SAFETY
INSTRUCTIONS
WARNING!
When using this product basic
precautions should always be
followed, including the following:
Read all the instructions before
using the product.
To reduce the risk of injury, close
supervision is necessary when a
product is used near children.
Know how to stop the product and
bleed pressures quickly. Be
thoroughly familiar with the controls.
Stay alert — watch what you are
doing.
Do not operate the product when
fatigued or under the influence of
alcohol or drugs.
Keep operating area clear of all
persons.
Do not overreach or stand on
unstable support. Keep good footing
and balance at all times.
Follow the maintenance instructions
specified in the manual.
This Product Is Provided With A
Ground Fault Circuit Interrupter
(GFCI) Built Into The Power Cord
Plug. If Replacement Of The Plug Or
Cord Is Needed, Use Only Identical
Replacement Parts.
Risk of Injection or Injury to persons
- Do not direct discharge stream at
persons.
High pressure jets can be dangerous
if subject to misuse. The jet must not
be directed at persons, animals,
electrical devices, or the machine
itself.
Wear safety goggles.
Do not use acids and solvents in this
product. These products can cause
physical injuries to the operator and
irreversible damage to the machine.
To reduce the risk of electrocution,
keep all connections dry and off the
ground. Do not touch plug with wet
hands.
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!
!
The Trigger Gun Safety Lock
PREVENTS the trigger from
accidentally being engaged. This
safety feature DOES NOT lock
trigger in the ON position.
Do not use extension cord for this
unit.
Warning!
To reduce the risk of
electrocution, keep all connections dry
and off the ground. Do not touch plug
with wet hands.
Grounding Instructions
This product must be grounded. If it
should malfunction or breakdown,
grounding provides a path of least
resistance for electric current to reduce
the risk of electric shock. This product
is equipped with a cord having an
equipment-grounding conductor and a
grounding plug. The plug must be
plugged into an appropriate outlet that
is properly installed and grounded in
accordance with all local codes and
ordinances.
Danger!
Improper connection of the
equipment-grounding conductor can
result in a risk of electrocution. Check
with a qualified electrician or service
personnel if you are in doubt as to
whether the outlet is properly
grounded. Do not modify the plug
provided with the product - if it will not
fit the outlet, have a proper outlet
installed by a qualified electrician. Do
not use any type of adapter with this
product.
Ground Fault Circuit Interrupter
(GFCI) Protection
This product is supplied with a Ground
Fault Circuit Interrupter (GFCI) built
into the power cord plug. This device
provides additional protection from the
risk of electric shock. If power is
interrupted in the line, the GFCI will
automatically re-close the circuit to the
load after power is restored.
Depending on the GFCI model, it may
be necessary to manually operate the
reset button to restore power to the
GFCI load circuit. If replacement of the
plug or cord is needed use identical
replacement parts.
WATER SUPPLY
Caution!
When connecting the water inlet to
the water supply mains, local regulations
of your water company must be
observed. In some areas the unit must
not be connected directly to the public
drinking water supply. This is to ensure
that there is no feedback of chemicals
into the water supply. Direct connection
via a receiver tank or backflow preventer
for example, is permitted.
Dirt in the feed water will damage the
unit. To avoid this risk, we recommend
fitting a water filter.
Never use the pressure washer to
draw in water contaminated with
solvents, e.g. paint thinners,
gasoline, oil, etc.
Always prevent debris from being
drawn into the unit by using a clean
water source.
SAVE THESE
INSTRUCTIONS!!
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Unit components
Please fold out illustration page at the front
1 Hand-held spray gun
2 Lever of hand-held spray gun
3 High-pressure hose
4 Handgun support
5 Detergent metering valve
6 Cap for detergent reservoir
7 Detergent reservoir
8 Detergent suction-hose with filter
9 Fastening screw for hood
10 Unit switch
11 Hood
12 Pressure gauge
13 High-pressure outlet
14 Nozzle rest
15 Water connection
16 Fine filter
17 Oil level display
18 Oil reservoir
19 Indicator light
20 Hose rest
21 Detergent reservoir vent
22 Accessories box
23 Cable holder
24 Handle
25 Nozzle
26 Marking of the nozzle
27 Spray lance
28 Pressure/flow control
29 Safety catch of hand-held spray gun
For your safety
Before you use the cleaner for the first time,
read these operating instructions and take
special note of the accompanying booklet
"Safety Instructions for High-Pressure Cleaners" No. 5.951-949.
Use of the cleaner
Use this unit exclusively for
– cleaning with high-pressure jet and deter-
gent (e.g. cleaning of machines, vehicles,
buildings, tools),
– cleaning with high-pressure jet without de-
tergent (e.g. cleaning facades, terraces,
gardening equipment).
For stubborn dirt we recommend the dirt
blaster as an optional accessory.
Safety features
Relief valve with pressure
switch
On reducing the flow rate with the pressure
and flow control, the relief valve opens and
part of the water runs back to the suction side
of the pump.
If the lever of the hand-held spray gun is released, the pressure switch switches the
pump off. If the lever is retracted, the pressure
switch switches the pump on again.
The overflow valve and pressure switch have
been set and sealed at the factory.
Adjustments are made only by Customer
Service.
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Preparing the unit for use
Unpack the unit
– When unpacking the unit, check the con-
tents of the packaging. If there has been
any damage in transit inform the dealer.
– Do not dispose of the packaging with the
household rubbish, hand it in at the appropriate collection point for recycling.
Check the oil level
Read the oil level displayed while unit is at
a standstill. The oil level must be above the
two indicators.
Activate the oil reservoir vent
Unscrew the fastening screw of the hood
and remove the hood.
Cut off the tip on the cover to the oil reser-
voir.
Fasten the unit cover.
Mount the accessories
Mount nozzle on the spray lance (see
markings on the top of the setting ring).
Fit the spray lance to the hand-held spray
gun with pressure and flow control.
Lock cable clincher into bore lateral to the
handle.
Tighten the high-pressure hose according-
ly.
Switching on the unit
Electrical connection
Caution!
The voltage specified on the model rating plate must correspond to the voltage supplied.
Do not use extension cord for this unit.
For connected loads see model rating plate/
Technical Specifications.
Caution!
It is essential that the unit is connected
to the power supply by means of a plug. An inseparable connection to the power supply is
prohibited. The plug is used to disconnect
from the mains.
Please turn the machine switch off before resetting the GFCI, otherwise, the GFCI will be
damaged
GFCI INSTRUCTIONS
STEP 1: Plug the Ground Fault Circuit
Interrupter (GFCI) into a working outlet.
STEP 2: Press ’’TEST’’, then press
’’RESET’’ to assure proper connection to
power.
Note: The actual appearance of the GFCI
may be different from this illustration.
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Water connection/Suction feed
operation
Connection to water main
Caution!
Pay attention to the regulations of the
water supply company; according to DIN
1988, the unit may not be connected direct to
the public drinking water supply. A short-term
connection via a non-return valve
(Order no. 6.412-578) is allowed.
For connected loads see Technical Specifications.
Connect a supply hose (not supplied) to the
water outlet on the unit and to the water inlet (e.g. water tap).
Open water inlet.
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Suctioning water from an open container
Screw suction hose with filter
(Order no. 4.440-238) to the water outlet.
Vent the unit before using.
To evacuate air from the unit, unscrew the
nozzle and leave the unit running until water exits with no air bubbles.
Switch off the unit and screw the nozzle
back on.
Operating the unit
Danger!
Observe the relative safety regulations
when using the unit at filling stations or other
high-risk areas.
Caution!
Only clean engines in places which
have appropriate oil separators (protection of
the environment).
Caution!
Only wash animals with the lowpressure fan jet (see "Selecting the type of
spray").
Operating with high pressure
The unit is equipped with a pressure switch.
The motor only starts up when the lever is retracted.
Set the unit switch to "I". The indicator light
will go green.
Unlock the hand-held spray gun and retract
the lever of the gun.
Adjust operating pressure and flow rate
(+/–) by rotating the pressure/flow control
(infinitely variable).
At the lowest flow rate the waste heat from
the motor will heat the water to approx.
15 °C.
Selecting the type of spray
The handgun must be closed.
Rotate the housing of the nozzle until the
desired symbol corresponds with the marking.
Select pencil jet or fan jet by contactless
changeover:
rotate the spray lance, which is pointing
down at an angle of approx. 45°, to the left
or right.
Explanation of the symbols
High-pressure pencil jet (0°),
for particularly stubborn accumulation of grime.
High-pressure fan jet (25°), for
dirt accumulation over a large
surface.
Low-pressure fan jet (CHEM)
for operation with detergent or for
cleaning at low pressure.
Operating with
detergent
Caution!
Unsuitable detergents can harm the
cleaner and the object which is to be cleaned.
Use only detergents which are released by
Kärcher. Proportions of detergent to be used
and accompanying instructions should be noted carefully. Use detergents sparingly out of
consideration for the environment.
Kärcher cleaning agents guarantee troublefree operation. Please seek advice or ask for
our catalogue of information sheets on cleaning agents.
Fill detergent reservoir.
Set nozzle to .
Set the detergent metering valve to the
desired concentration.
Concentration of detergent when flow at
maximun:
Position of metering
valve
1357
0.5%2.5%5.0%7.0
%
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Recommended cleaning methods
Spray detergent with low pressure jet spar-
ingly over the dry surface to be cleaned and
let it take effect but not dry out.
Spray off (rinse off) the loosened dirt using
the high-pressure spray.
When you have finished the operation, set
detergent metering valve to "0" and switch
the unit on for about 1 minute and rinse it
clear of detergent.
Interrupting the operation
Release lever of the handgun, the unit
switches off. Retract lever again and the
unit switches on again.
Availability time
Within the availability time, the unit starts
when the hand-held spray gun is opened.
The indicator light will go green.
If the spray gun remains closed for
30 minutes, the availability time ends.
The indicator light will flash green.
Reset availability time
Switch off the unit switch.
Wait a moment.
Switch the unit back on again.
Customer Service can change the unit to
permanent operation.
Switching the unit off
Set unit switch to "0" and pull out power
plug.
Close water inlet.
Retract lever until the unit is without pres-
sure.
Push safety catch of the hand-held spray
gun forward to lock the lever of the gun
from being actuated inadvertently.
Danger!
Risk of scalding due to hot water. Residual water contained in the switched off unit
can heat up. When removing the hose from
the water inlet, the heater water can spurt out
and cause scalds. Do not remove the hose
until the unit has cooled down.
Transporting the cleaner
To transport the cleaner over relatively long
stretches, take hold of it by the handle and
pull it along behind you.
Empty the detergent reservoir before trans-
porting it horizontally.
Storing the cleaner
Place the handgun in the support.
Reel in the high-pressure hose and hang it
over the hose rest.
or
Coil the connecting cable round the cable/
hose rest.
Frost protection
Caution!
Frost will destroy a unit that is not completely empty of water! Store the unit where it
will be free of frost.
If storage away from frost is not possible:
Empty the detergent tank (see care and
maintenance/As and when required).
Drain off the water and rinse the unit
through with anti-freeze.
Leave the unit to dry for max. 1 minute.
Use the standard glycol-based anti-freezes
for cars.
Follow the handling instructions of the anti-
freeze manufacturer.
Care and maintenance
Danger!
Before any care and maintenance work
on the unit draw out the mains plug.
Caution!
When changing the oil, dispose of any
waste oil only at authorised collection points.
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Safety inspection/Maintenance
contract
You can arrange with your dealer to have a
regular safety inspection carried out or to
have a maintenance contract. Please seek
advice.
Before each use
Check connecting cable for damage (risk of
getting an electric shock), have a damaged
connecting cable replaced without delay by
authorised Customer Service personnel or
an electrician.
Check high-pressure hose for damage
(danger of explosion), replace a damaged
high-pressure hose without delay.
Check unit (pump) for any leaks.
Three drops per minute are allowable and
can appear on the underside of the unit.
Seek the help of Customer Service if leaks
are more serious.
Every week
Check oil level in oil reservoir: if the oil is
milky (water in oil), seek the help of Customer Service immediately.
Clean the fine filter.
– Unpressurize unit.
– Unscrew the fastening screw of the hood
and remove the hood.
– Unscrew the cover with filter.
– Clean the filter with clean water or com-
pressed air.
– Reassemble in the reverse order.
Clean the filter at the suction hose for de-
tergent.
Annually or after 500 operating
hours
Change the oil
– For oil quantity and type see Technical
Specifications.
– Undo the fastening screw, remove the
hood, unscrew the front oil drain plug on
the motor housing.
– Drain oil into a suitable container.
– Screw in the oil drain plug.
– Fill slowly with fresh oil; air bubbles have
to escape.
As and when required
Emptying and cleaning the detergent tank
– Pull out the screw cap and hose for the
detergent tank.
– Place the unit on its rear.
– Empty and clean the detergent tank.
Troubleshooting
Danger!
Before any repair work is undertaken,
switch the unit off and pull out the power plug.
Have electrical components checked and repaired only by authorised Customer Service
personnel.
For faults which are not identified in this chapter, or when in doubt or when expressly instructed to do so, consult authorised
Customer Service personnel.
Indicator light
The indicator light shows the operating status
(green) and faults (red).
To reset:
Switch off the unit switch.
Wait a moment.
Switch the unit back on again.
Operating status display
Constant green light:
– Unit is operational.
1 x flashing green:
– Operational readiness expired after
30 minutes.
– The unit switched off after 30 minutes of
permanent operation (safety feature in
the case of a burst high-pressure hose).
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