Karcher Pressure Washer K 399 M User Manual

K 3.99 M  
High Pressure  
Washer Operator  
Manual  
Overview ....................................... 2  
IMPORTANT PRECAUTIONS.. 3 - 4  
Assembly Instructions .................. 4  
Operating Instructions .................. 5  
GFCI Instructions ......................... 6  
Using the Accessories ................. 6  
Working with Detergents ............... 7  
Shut Down and Clean-Up .............. 8  
Taking a Break .............................. 8  
Winterizing andLong-Term  
Storage ......................................... 8  
Maintenance Instructions ............. 9  
Cleaning Tips ......................... 9 - 10  
Optional Cleaning Accessories .. 10  
Troubleshooting .................... 11 - 12  
Specifications  
Operating pressure  
Water volume  
Voltage  
1600 PSI  
1.6 GPM  
120 V  
Amp draw  
14 AMPS  
In USA call:  
1-800-537-4129  
or visit our website:  
Part No. 1.423-235.0  
Manual Part No. 5.961-114.0 10/03EN  
 
IMPORTANT PRECAUTIONS – Read First!  
extension cord from the receptacle before  
2
Safety Warnings  
disconnecting the product from the extension  
cord. If you are using an extension cord, it  
should always be completely unwound from  
the cable drum.  
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  
When using this product, basic precautions  
should always be followed:  
Read all the instructions before using  
the product.  
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.  
To reduce the risk of injury, do not  
operate the machine near children.  
Learn how to stop the machine and  
release pressure quickly. Be thoroughly  
familiar with the controls.  
Stay alert — watch what you are doing.  
Wear safety goggles.  
Do not use acids, solvents,  
replacement parts.  
or any flammable material  
in this product. These products can  
cause physical injuries to the operator  
and irreversible damage to the machine.  
Do not operate the product when  
fatigued or under the influence of  
alcohol or drugs.  
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.  
3
Keep operating area clear of all persons.  
Do not stand on unstable surfaces.  
Stand with both feet balanced at all  
times.  
To reduce the risk of electrocution, keep  
all connections dry and off the ground.  
Do not touch plug with wet hands.  
The Trigger Gun Safety Lock  
PREVENTS the trigger from accidentally  
being engaged. This safety feature  
DOES NOT lock trigger in the on  
position.  
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.  
Extension Cords  
Use a sufficient gauge: Up to 25 ft = 12/3  
AWG; 25 to 50 ft = 10/3 AWG. Use only  
extension cords that are intended for outdoor  
use. These extension cords are identified by  
the marking “Acceptable for use with outdoor  
appliances; store indoors while not in use.”  
Use only extension cords having an electrical  
rating not less than the rating of the product.  
Do not use damaged extension cords.  
Examine extension cord before using and  
replace if damaged. Do not abuse extension  
cord and do not yank on any cord to  
Caution  
• Follow the maintenance instructions  
specified in the manual.  
• This machine has been designed for  
use with cleaning detergent supplied or  
recommended by the manufacturer. The  
use of other cleaning detergents may  
affect the operation of the machine and  
void the warranty.  
disconnect. Keep cord away from heat and  
sharp edges. Always disconnect the  
 
IMPORTANT PRECAUTIONS continued  
PRECAUTIONS  
Water Supply (Cold Water Only)  
• The water supply temperature must not  
exceed 104°F/40°C.  
• Water hose must be at least 3/4 inch in  
diameter.  
• 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.  
• Flow rate of water supply must not fall  
below 2.5 GPM (gallons per minute).  
• Flow rate can be determined by running  
the water for one minute into an empty“  
5-gallon container.  
Save these instructions!  
ASSEMBLY INSTRUCTIONS  
4
Step 1  
Step 2  
Step 3  
Step 4  
Pull out the locking slide from the right side of the  
trigger gun handle (A), and insert the small end of  
the high pressure hose into place (B). Push the  
locking slide back into the trigger gun to lock the  
hose in position.  
 
OPERATING INSTRUCTIONS  
Step 1  
Step 2  
Connect the high pressure hose to the high  
pressure outlet.  
Insert the spray wand of your choice into the  
trigger gun. Press in against the spring tension  
and twist into the locked position.  
5
Step 4  
Step 3  
Connect garden hose to the cold water  
source and turn water on completely.  
Connect the garden hose to the water inlet.  
Step 5  
Step 6  
Plug the power cord into the power outlet.  
Unlock the lock of the trigger gun (A). Trigger  
the gun (B) to eliminate trapped air, wait for a  
steady flow of water to emerge from the  
spray nozzle.  
Turn on the pressure washer (I). The motor  
starts only if the trigger of the gun is  
pulled and shuts off when the trigger is  
released.  
 
GFCI INSTRUCTIONS  
Note:  
The actual  
appearance  
of the GFCI  
may be  
different  
from this  
illustration.  
Step 1  
Step 2  
Plug the Ground Fault Circuit Interrupter  
(GFCI) into a working outlet  
Press “TEST”, then press “RESET” to assure  
proper connection to power.  
USING THE ACCESSORIES  
Vario spray wand  
The Vario spray wand allows you to adjust the cleaning pressure. To clean at maximum  
pressure, the Vario wand must be positioned to the high pressure setting (+).  
To apply detergent, the wand must be positioned to the low pressure setting (–).  
For lower  
pressure turn  
6
wand collar in the  
minus () direction.  
For higher  
pressure turn  
wand collar in the  
plus (+) direction.  
Rotating spray wand  
Warning  
This wand features a 0º pencil jet which  
rotates 360º for maximum dirt cutting action,  
effectively increasing cleaning performance  
up to 50%. This wand combines the cleaning  
performance of a 0º pencil jet with the surface  
coverage of a wide angle nozzle. Not  
TO AVOID SERIOUS INJURY, NEVER  
POINT SPRAY NOZZLE AT YOURSELF,  
OTHER PERSONS OR ANIMALS  
recommended for soft materials, siding,  
painted surfaces, decks or autos.  
 
Working with detergents  
Karcher pressure washers operate only at two pressures. The high pressure setting is used for  
cleaning, you cannot apply detergents when working at high pressure. To apply detergents you  
must be operating at low pressure (–).  
For best  
results see  
Cleaning Tips  
on pages 9 & 10  
for specific  
information on how to  
clean different  
surfaces.  
Always Use Karcher  
Detergents for Best Results.  
Step 1 Install the Vario spray wand. Set  
Karcher biodegradable detergents  
the Vario spray wand to the low pressure  
are“specially formulated to protect the  
setting (–) by turning the wand collar. The  
environment and your pressure washer.  
wand must be set in the low pressure (–)  
Special formula won’t clog the suction tube  
position to apply detergents.  
filter and will protect the internal parts of the  
pressure washer for a longer life. For Karcher  
Detergents, check your retailer or call:  
7
In USA Call:  
1-800-537-4129  
or visit our website:  
The following Karcher detergents are  
available:  
One Gallon ready to use  
• Vehicle Wash  
• All Purpose Cleaner • House Wash  
• Deck Wash  
---------------------------------------------------  
Detergent Concentrate Tablets  
(10 Pack; makes 1 1/4 gallon RTU product)  
• Degreaser  
Step 2 Fill the detergent reservoir with  
Kärcher detergent. Place the filter end of  
detergent suction tube into the detergent  
reservoir  
• All Purpose  
• Degreaser  
• Deck and patio • Windows and Siding  
---------------------------------------------------  
Caution  
Never use:  
• Bleach, Chlorine products and other  
corrosive chemicals  
• Liquids containing solvents  
(i.e., paint thinners, gasoline, oils)  
Tri-sodium phosphate products  
• Ammonia products  
• Acid-based products  
These chemicals will harm the unit and will  
damage the surface being cleaned.  
Step 3 Turn on the pressure washer.  
Pull trigger to operate unit: Liquid detergent  
is drawn into the unit and mixed with water.  
Apply detergent to work area. Do not allow  
detergent to dry on surface  
 
SHUTTING DOWN & CLEAN-UP  
Step 2  
Step 3  
Step 4  
Step 1  
Turn the switch to off Turn off the water Press trigger to  
Remove detergent suction  
tube from container and  
insert into 1 gallon of fresh  
water. Siphon water at low  
pressure for one minute.  
(O) position and  
unplug cord from  
outlet.  
source.  
release water  
pressure.  
8
Step 5  
Step 6  
Step 7  
Disconnect the garden hose from the Disconnect the high pressure hose Engage the gun  
water inlet on the unit.  
from the high pressure outlet.  
safety lock.  
TAKING A BREAK... five minutes or more  
Step 1  
Step 2  
Engage the gun  
safety lock.  
Turn pressure washer  
to off (O) position.  
WINTERIZING AND LONG-TERM STORAGE  
1. Disconnect all water connections.  
4. Store the machine and accessories in  
a room which does not reach freezing  
temperatures.  
Caution: Failure to follow the above  
directions will result in damage to the  
pump assembly and accessories.  
2. Turn on the machine for a few seconds,  
until the water which had remained in  
the pump exits. Turn off immediately.  
3. Do not allow high pressure hose to  
become kinked.  
 
CARE AND MAINTENANCE INSTRUCTIONS  
Maintenance  
Theunitismaintenance-free.  
Cleaning the water inlet filter  
Pulloutthewaterinletfilterwithflat-nose  
pliers and rinse out in warm water.  
CLEANING TIPS  
Deck Cleaning  
(with or without detergent)  
Cement Patios, Brick and Stone  
(with or without detergent)  
Pre-rinse deck and surrounding area with  
fresh water. If using Kärcher Deck and Patio  
Cleaner, place detergent suction tube direct-  
ly into cleaning solution and apply to surface  
at low pressure. For best results, limit your  
work area to smaller sections of approxi-  
mately 25 square feet. Allow Kärcher Deck  
and Patio Cleaner to remain on surface 1-3  
minutes. Do not allow detergent to dry on  
surface. Rinse at high pressure in a long  
sweeping motion keeping the spray nozzle  
approximately 3-6 inches from the cleaning  
surface. Always clean from top to bottom  
and from left to right. When moving on to a  
new section of the cleaning surface, be sure  
to overlap the previous section to eliminate  
stop marks and ensure a more even clean-  
ing result.  
Pre-rinse cleaning surface with fresh water.  
If using Kärcher Deck and Patio or All  
Purpose Cleaner, place detergent suction  
tube directly into cleaning solution and apply  
to surface at low pressure. For best results,  
limit your work area to smaller sections of  
approximately 25 square feet. Allow Kärcher  
Deck and Patio or All Purpose Cleaner to  
remain on surface 1-3 minutes. Do not allow  
detergent to dry on surface. Rinse at high  
pressure in a sweeping motion keeping the  
spray nozzle approximately 3-6 inches from  
the cleaning surface. Always clean from top  
to bottom and from left to right.  
9
Cars, Boats & Motorcycles  
(with or without detergent)  
Pre-rinse vehicle with fresh water. If using  
Kärcher Vehicle or All Purpose Cleaner,  
place detergent suction tube directly into  
cleaning solution and apply to surface at low  
pressure. For best results, clean one side of  
vehicle at a time and always apply detergent  
from bottom to top, do not allow detergent to  
dry on surface. If needed, use special Wash  
Brush Attachment to remove stubborn dirt.  
Rinse at high pressure in a sweeping motion  
keeping the spray nozzle approxi-mately 6-8  
inches from the cleaning surface (distance  
should increase when rinsing pin-striping or  
other sensitive surfaces). Always clean from  
top to bottom and from left to right. For best  
results, wipe surface dry with a chamois or  
soft dry cloth.  
House Siding  
(with or without detergent)  
Pre-rinse cleaning surface with fresh water.  
If using Kärcher House or Window and  
Siding Cleaner, place detergent suction tube  
directly into cleaning solution and apply to  
surface at low pressure (for best results,  
limit your work area to sections of approxi-  
mately 6 feet and always apply detergent  
from bottom to top). Allow Kärcher House or  
Window and Siding Cleaner to remain on  
surface 1-3 minutes. Do not allow detergent  
to dry on surface, if surface appears to be  
drying, simply wet down surface with fresh  
water. If needed, use special Wash Brush  
Attachment to remove stubborn dirt. Rinse  
at high pressure from top to bottom in an  
even sweeping motion keeping the spray  
nozzle approximately 6 inches from the  
cleaning surface.  
 
CLEANING TIPS – continued  
Barbecue Grills, Outdoor Power  
Equipment & Gardening Tools  
(with or without detergent)  
Patio & Lawn Furniture  
(with or without detergent)  
Pre-rinse furniture and surrounding area  
with fresh water. If using Kärcher All  
Purpose Cleaner, place detergent suction  
tube directly into cleaning solution and apply  
to surface at low pressure. Allow Kärcher All  
Purpose Cleaner to remain on surface 1-3  
minutes. Do not allow detergent to dry on  
surface. If needed use special Wash Brush  
Attachment to remove stubborn dirt. Rinse  
at high pressure in a sweeping motion  
keeping the spray nozzle approximately 3-6  
inches from the cleaning surface. For best  
results, clean from top to bottom and from  
left to right.  
Pre-rinse cleaning surface with fresh water.  
If using Kärcher All Purpose Cleaner or  
Degreaser, place detergent suction tube  
directly into cleaning solution and apply  
detergent at low pressure. Allow Kärcher  
detergent to remain on surface 1-3 minutes.  
Do not allow detergent to dry on surface.  
Rinse at high pressure keeping the spray  
nozzle approximately 3-6 inches from the  
cleaning surface. For removing extremely  
stubborn dirt, it may be necessary to move  
the spray nozzle even closer to the surface  
for greater dirt cutting action. To remove  
caked on mud from garbage cans, lawn  
mower blades, wheel barrels or other  
non-sensitive metal surfaces, you may  
want to experiment with different settings on  
the Quattro Nozzle.  
Recommendations  
• Before cleaning any surface an inconspic-  
uous area should be cleaned to test spray  
pattern and distance for maximum clean-  
ing results.  
• If painted surfaces are pealing or  
chipping, use extreme caution as  
pressure washer may remove the loose  
paint from the surface.  
10  
• While using on surfaces which might  
come in contact with food. Flush surfaces  
with plenty of drinking water.  
OPTIONAL CLEANING ACCESSORIES  
Optional cleaning accessories are available to further enhance your cleaning capabilities:  
See accessories order form for product descriptions and ordering instructions.  
• Vario Spray Wand  
• House Washing Wand  
• Wet Sandblasting Attachment  
• Pipe Drain Cleaner  
• Extension Wand, 20 inches  
• Flexible Spray Wand  
• Water Suction Hose With Filter  
• Extension Hose 25’  
• Underbody Spray Wand  
• 4 Piece Extension Wand, 66 inches  
• Rotating Wash Brush  
• K12 Surface Cleaner  
In USA call:  
1-800-537-4129  
 
TROUBLESHOOTING  
Disconnect the machine from the power source before making any repair.  
Symptom  
Cause  
Solution  
Motor will not start  
On/Off switch is in the “OFF” (O)  
position.  
Turn switch to the “ON” (I) position  
Power cord is not plugged in.  
Extension cord is too long.  
Plug in power cord.  
Replace extension cord with either  
Extension cord is not proper gauge. “a 25 ft. 12/3 gauge cord or a 50  
Extension cord is damaged.  
ft. 10/3 gauge cord.  
Electrical outlet does not supply  
adequate power.  
Try a different outlet.  
Tripped circuit breaker  
Reset breaker (power supply) or  
ground fault circuit interrupter.  
Unit does not reach high  
pressure.  
Diameter of garden hose is too  
small.  
Replace with a 3/4 inch garden  
hose.  
Check garden hose for kinks, leaks  
and blockage.  
Water supply is restricted.  
Not enough inlet water supply.  
Water inlet filter is clogged.  
11  
Open water source full force.  
Remove filter and rinse out in  
warm water.  
Spray wand is in low pressure  
position.  
Turn spray wand to high pressure  
position.  
Output pressure varies high  
and low.  
Not enough inlet water supply.  
Turn water on full force. Check  
garden hose for kinks, leaks or  
blockage.  
Pump is sucking air.  
Check that hoses and fittings are  
air tight. Turn off machine and  
purge pump by squeezing trigger  
gun until “a steady flow of water  
emerges through the nozzle.  
Water inlet filter is clogged.  
Remove filter and rinse out in  
warm water.  
Discharge nozzle is obstructed.  
Calcified gun, hose or spray wand.  
Blow out or remove debris with a  
“fine needle.  
Run distilled vinegar through  
“detergent suction tube.  
 
TROUBLESHOOTING – continued  
Symptom  
Cause  
Solution  
No detergent.  
Detergent suction tube not properly Check connection.  
connected to the machine.  
Detergent is too thick.  
Dilute detergent, for best results  
use Kärcher detergent.  
Filter on detergent suction tube is  
clogged.  
Run warm water through filter to  
remove debris.  
Damaged or clogged detergent  
suction tube.  
Remove obstruction or replace  
detergent suction tube.  
Spray wand is in high“pressure  
position.  
Turn spray wand tip to low  
pressure position.  
Discharge nozzle is obstructed.  
Blow out or remove debris with  
fine needle.  
Garden hose  
Loose fittings.  
Tighten fittings.  
connection leaks.  
Missing/worn rubber washer.  
Insert new washer.  
12  
Spray wand leaks.  
Spray wand not properly attached. Insert the spray wand into the  
trigger gun. Carefully press in  
against the spring tension and twist  
into the locked position.  
Broken o-ring or plastic insert.  
Pump is sucking air.  
Call Kärcher customer service  
“hotline and order repair kit “(part  
no. 2.883-111.0).  
Pump is noisy.  
Check that hoses and fittings are  
air tight. Turn off machine and  
purge pump by squeezing trigger  
gun until “a steady flow of water  
emerges through the nozzle.  
Water leaks from pump (up  
to 10 drops per minute is  
permissible).  
Loose fittings.  
Check that all fittings are tight.  
Water seals are damaged or worn. Call service center.  
Oil seals are damaged or worn.  
Call service center.  
Oil Drip.  
If you encounter any additional  
difficulties not listed, please call our  
service center for help.  
In USA Call:  
1-800-537-4129  
Karcher Customer Support USA  
 

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