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Model K 390 M plus
High Pressure Washer Operator Manual
Overview ................................................................................... 2
Precautions ............................................................................ 2-4
Assembly Instructions .............................................................. 4
Operating Instructions.............................................................. 5
Using the Accessories ............................................................
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OVERVIEW High Pressure Washer 2 Machine includes 1 Detergent filter and suction tube 10 Trigger gun safety lock 2 On/Off switch 11 Trigger gun with high pressure hose 3 High pressure outlet 12 Trigger gun holder 4 Water inlet 13 Mobile adapter bracket (qty. 2) 5 Quick connect adapter male 14 Package of 6 screws 6 Quick connect adapter female 15 Hose/cord caddy 16 Handle 7 Rotary nozzle 17 Power cord 8 High/Low pressure nozzle 9 Cleaning brush NEVER! Never point nozzle at people or animals. Neve
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IMPORTANT PRECAUTIONS – Read First! Extension Cords Safety Warnings Use a sufficient gauge: When using this product basic precautions Up to 25 ft = 12/2 AWG: should always be followed: 25 to 50 ft =10/2 AWG. • Read all the instructions before using the Use only extension cords that are intended product. for outdoor use. These extension cords are • High pressure jets can be dangerous if identified by a marking “Acceptable for use subject to misuse. The jet must not be with outdoor appliances
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IMPORTANT PRECAUTIONS – continued Water Supply (Cold Water Only) • Water hose must be at least 3/4 inch in • Never use the pressure washer to draw diameter. in water contaminated with solvents, e.g. • Flow rate of water supply must not fall paint thinners, gasoline, oil, etc. below 2 GPM (gallons per minute). NOTE: Dirt in the feed water will damage the unit. To avoid this risk, • Flow rate can be determined by running we recommend fitting a water filter. the water for one minute into an empty 5
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OPERATING INSTRUCTIONS Step 1 Step 2 Connect the high pressure hose to the Insert the spray wand of your choice into the unit’s high pressure outlet. trigger gun. Press in against the spring tension (A) and twist into the locked position (B). 5 Step 3 Step 4 Connect garden hose to unit’s water inlet Connect garden hose to the cold water using the quick connect adapter. source and turn water on completely. Step 5 Step 6 Plug the power cord into the power outlet. Turn on the pressure washer (I). U
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USING THE ACCESSORIES High/low pressure nozzle This nozzle features two positions. The high This brush is ideal for removing stubborn setting provides a steady powerful 25° high pressure spray pattern, for general with detergents only. cleaning. The low setting creates a wider 40° low pressure pattern. 6 Turn the wand nozzle clockwise for high pressure. Turn counter clockwise for low pressure. NOTE: Detergent is applied with the nozzle set at low pressure. Rotary nozzle This nozzle features a 0º
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WORKING WITH DETERGENTS Kärcher Pressure washers operate at two pressures. The high pressure is used for cleaning, you cannot apply detergents when working at high pressure. To apply detergents you must be operating at low pressure. Step 1 Install the High/Low pressure nozzle. Step 3 Turn on the pressure washer. Set the nozzle to the low pressure setting by Pull trigger to operate unit: Liquid detergent turning the nozzle collar. The nozzle must be is drawn into the unit and mixed with water.
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SHUTTING DOWN & CLEAN-UP Step 1 Step 2 Step 3 Step 4 Remove detergent suction Turn the switch to Turn off the water Press trigger to tube from jug and insert off (O) position and source. release water into 1 gallon (5 L) of fresh unplug cord from pressure. water. Siphon water at outlet. low pressure for one minute. 8 Step 5 Step 6 Disconnect the garden hose Disconnect the high pressure hose from the high from the water inlet on the unit. pressure outlet and engage the gun safety lock. TAKING A B
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CLEANING TIPS Deck Cleaning Cement Patios, Brick and Stone Pre-rinse deck and surrounding area with (with or without detergent) Pre-rinse cleaning surface with fresh water. detergent suction tube directly into cleaning If using Pressure Wash, place detergent solution and apply to surface at low suction tube directly into cleaning solution pressure. For best results, limit your work and apply to surface at low pressure. For area to smaller sections of approximately best results, limit your work
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CLEANING TIPS – continued Barbecue Grills, Outdoor Patio & Lawn Furniture (with or without detergent) Power Equipment & Pre-rinse furniture and surrounding area Gardening Tools with fresh water. If using Pressure Wash, (with or without detergent) place detergent suction tube directly into Pre-rinse cleaning surface with fresh water. cleaning solution and apply to surface at If using Pressure Wash or Degreaser, place low pressure. Allow All Purpose Cleaner to detergent suction tube directly in
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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) Turn switch to the “ON” (I) position position. Power cord is not plugged in. Plug in power cord. Extension cord is too long. Replace extension cord with either Extension cord is not proper gauge. a 25 ft. 12/2 gauge cord or a 50 Extension cord is damaged. ft. 10/2 gauge cord. Electrical outlet does not supply Try a different outlet.
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TROUBLESHOOTING – continued Symptom Cause Solution No detergent. Detergent suction tube not properly Check connection. connected to the machine. Detergent is too thick. Dilute detergent. Filter on detergent suction tube is Run warm water through filter to clogged. remove debris. Damaged or clogged detergent Remove obstruction or replace suction tube. detergent suction tube. Spray wand is in high pressure Turn spray wand tip to low position. pressure position. Discharge nozzle is obstructed. Blow
