Kärcher HD 2.0/10 Ed Operator's Manual

Also see for HD 1.9/15 Ed: Operator's manual Operator's manual

Contents

#9.800-085.0 • Rev. 01/08PRESSURE WASHER Troubleshooting Guide10TROUbLESHOOTINgPRObLEM POSSIbLE CAUSE SOLUTIONPUMP RUNNINgNORMALLy bUTPRESSURE LOW ONINSTALLATIONPump sucking air Check water supply and possibility of air.Check valves sticking Check and clean or replace if necessary.Unloader valve seat faulty Check and replace if necessary.Nozzle incorrectly sized Check and replace if necessary.Worn piston packing Check and replace if necessary.fLUCTUATINg PRES-SUREValves worn Check and replace if necessary.Blockage in valve Check and replace if necessary.Pump sucking air Check water supply connections.Worn piston packing Check and replace if necessary.Insufficient water Check filter and hose for breakage.PRESSURE LOWAfTER PERIOD OfNORMAL USENozzle worn Check and replace if necessary.Suction or delivery valves worn Check and replace if necessary.Suction or delivery lines blocked Check and clean if necessary.Unloader valve seat worn Check and replace if necessary.Worn piston packing Check and replace if necessary.Water temperature excessive Reduce to below 160° F.PUMP NOISy Air in suction line Check water supply and connections on suc-tion line.Broken or weak suction or delivery valvespringCheck and replace if necessary.Foreign matter in valves Check and clean if necessary.Worn bearings Check and replace if necessary.Excessive temperature of water Reduce to below 160° F.PRESENCE OfWATER INPUMP OILOil seal worn Check and replace if necessary.High humidity in air Check and replace if necessary.Piston packing worn Check and replace if necessary.WATER DRIPPINgfROM UNDER PUMPPiston packing worn Check and replace if necessary.O-ring plunger retainer worn Check and replace if necessary.WATER DRIPPINgfROM PUMPPROTECTORWater supply pressure too high (over90 PSI)Lower water supply pressure using a regula-tor.Spray gun is in the off position for over5 minutesTurn machine off if not in use for over 5 min-utes.OIL DRIPPINg Oil seal worn Check and replace if necessary.ExCESSIvEvIbRATION IN HIgHPRESSURE HOSEIrregular functioning of the pumpvalvesCheck and replace if necessary.MOTOR DOESNOT START WHENSWITCHED ONPlug not well connected or lack of powersupplyCheck plug, cable and switch.WHEN SWITCHINgON THE MACHINE,MOTOR HUMS bUTDOES NOT RUNMain voltage is insufficient lower thanthe minimum requiredCheck to make sure main power supply isadequate.The pump is stuck or frozen Check by turning the motor manually.MOTOR STOPS Tripped thermal overload due to over-heatingCheck that main voltage corresponds to thespecifications. Wait a few minutes before turn-ing on the machine again by resetting the GFCIcord.