Karcher Kärcher Support and Troubleshooting for 3.91 and K3.91 Models
Page 16

TROUBLESHOOTING

￿ CAUTION

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”

Turn switch to the “ON” (I) posi-

 

(O) position.

tion

 

Power cord is not plugged in.

Plug in power cord.

 

Electrical outlet does not sup-

Try a different outlet.

 

ply adequate power.

 

 

Tripped GFCI plug.

Press “RESET” button on

 

 

GFCI plug.

 

Tripped circuit breaker.

Switch off pressure washer.

 

 

The reset comes automatically

 

 

once the temperature of the

 

 

unit drops.

Unit does not

Diameter of garden hose is

Replace with a 5/8 inch or larg-

reach high pres-

too small.

er garden hose.

sure.

 

 

Water supply is restricted.

Check garden hose for kinks,

 

 

leaks and blockage.

 

Not enough inlet water sup-

Open water source full force.

 

ply.

 

 

Water inlet filter is clogged.

Remove filter and rinse out in

 

 

warm water.

 

Spray wand is on low pres-

Turn spray wand to high pres-

 

sure position.

sure position.

Output pressure

Not enough inlet water sup-

Turn water on full force. Check

varies high and

ply.

garden hose for kinks, leaks or

low.

 

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 obstruct-

Blow out or remove debris with

 

ed.

a fine needle.

 

Calcified gun, hose or spray

Run distilled vinegar through

 

wand.

detergent suction tube.

16English

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Contents 91 M Specifications Safety Alert SymbolsHigh Pressure Washer Operator Manual Owner/User ResponsibilityModel Overview Important Safety Instructions Water Supply Cold Water Only Assembly InstructionsRequired tools Attach the handle and secure with 2 screws Operating Instructions Vario Power Spray Wand Using the AccessoriesDirtblaster Working with Detergents Detergents can only be applied at low pressure Min StepOne Gallon ready to use Never useShutting Down & CLEAN-UP Care and Maintenance Instructions Cleaning the water inlet filterMaintenance Winterizing and LONG-TERM StorageCleaning Tips Deck CleaningHouse Siding Cement Patios, Brick and StonePatio & Lawn Furniture RecommendationsOptional Cleaning Accessories Wet Sandblasting Kit bayonet Wide Area Surface CleanerDetergent Foamer Attachment Troubleshooting Symptom Cause SolutionKärcher Customer Support USA Kärcher Customer Service CDN Symptom Cause SolutionManual DE Usuario DEL Limpiador DE Alta Presión EspecificacionesSoporte Kärcher Mexico Símbolos de aviso de seguridad Responsabilidades del propieta Rio/usuarioVista General DEL Modelo Instrucciones DE Seguridad Importantes Instrucciones de puesta a tierraGuarde Estas INS- Trucciones Suministro DE Agua sólo Agua fríaHerramientas necesarias Instrucciones DE MontajePaso Instrucciones DE Funcionamiento No usar si el test anterior da error Utilización DE LOS Accesorios Pulverizador telescópico variable accionado mecánicamenteTrabajar CON Detergentes No utilice nuncaApagado Y Limpieza El uso de estos objetos invalidará la garantíaLimpieza del filtro de entrada de Agua Instrucciones DE Conservación Y MantenimientoMantenimiento Consejos DE Limpieza Limpieza de cubiertasSolapados de la casa Patios de cemento, ladrillos y PiedrasMobiliario de patios y jardines RecomendacionesAccesorios DE Limpieza Opcionales Accesorio espumador de deter Gente Kit de limpieza de tubos de Pies bayonetaLimpiador de superficies de zo Nas amplias T Localización Y Reparación DE Averíasg Síntoma Causa SoluciónSíntoma Causa Solución Co rotos ClienteCaractéristiques Nettoyeur Haute Pression Manuel DutilisationResponsabilité du propriétaire De lutilisateur Generalites Consignes DE Securite Importantes Instructions de mise à terreProtection par disjoncteur diffé Rentiel Alimentation EN EAU eau Froide seulementOutils nécessaires Instructions DE MontageTournevis Philips, médiale non fourni Mode Demploi Avertissement Utilisation DES Accessoires Lance VarioLitres 1 gallon prêt à lemploi Emploi DE DetergentsNe jamais utiliser Prendre UNE Pause ...cinq minutes ou plus Arrêt DE Lappareil ET NettoyageInstructions Dentretien ET DE Maintenance MaintenanceRemisage Hivernal ET Entreposage a Long Terme Nettoyage du filtre dadmission DeauConseils DE Nettoyage Terrasses en boisPatios de ciment, briques et pier Res Revêtements de façadesRecommandations Meubles de patio et de jardinAccessoires DE Nettoyage EN Option Kit de nettoyage de conduite 25 Ft ,5 m baïonnette Kit de sablage humide baïon NetteEmbout moussant Nettoyeur grande surface T-Ra CerSymptôme Cause Solution DépannageSymptôme Cause Solution Kärcher Customer Support USA

K 3.91 M specifications

The Kärcher K 3.91 M is a powerful and versatile high-pressure cleaner designed to meet various cleaning needs around the home and garden. This compact and lightweight pressure washer is perfect for anyone seeking effective cleaning solutions for vehicles, patios, garden furniture, and more.

One of the standout features of the K 3.91 M is its impressive cleaning power, boasting a maximum pressure of up to 120 bar. This level of pressure allows for the efficient removal of dirt and grime, ensuring that surfaces are left spotless. The machine is equipped with a reliable 1.5 kW motor that combines power with energy efficiency, making it an environmentally friendly choice.

The K 3.91 M comes with an integrated detergent tank which simplifies the cleaning process by allowing users to apply detergents directly from the unit. This feature is especially useful for tackling stubborn stains and dirt, ensuring a thorough clean. Additionally, the adjustable detergent dosing system lets users regulate the amount of detergent used, further enhancing the cleaning experience.

Another notable attribute of the K 3.91 M is its range of included accessories. The pressure washer is equipped with a trigger gun for easy operation, a 6-meter high-pressure hose for extended reach, and a variety of nozzles to cater to different cleaning tasks. The Vario Power Spray lance allows users to adjust the pressure quickly, making it easy to switch between delicate surfaces and tougher cleaning tasks as needed.

Portability is key with the K 3.91 M, and the unit features a compact design with a built-in carrying handle, making it easy to transport and store. Its integrated storage for hoses and accessories ensures that everything stays organized and within reach.

In terms of durability, Kärcher is known for producing high-quality products, and the K 3.91 M is no exception. Constructed with robust materials, it is built to withstand the rigors of regular use while maintaining optimal performance.

Overall, the Kärcher K 3.91 M is an excellent choice for homeowners and DIY enthusiasts looking for a reliable and efficient high-pressure cleaner. With its powerful motor, versatile cleaning capabilities, and user-friendly design, it can tackle a wide range of cleaning tasks with ease. Whether for occasional use or more frequent cleaning needs, the K 3.91 M delivers consistent results and exceptional value.
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