Kärcher HD 6/16-4 M / MX Service Manual

Kärcher HD 6/16-4 M / MX Service Manual Manual pdf 24 page image

24 English 5.906-246.0 Rev. 01 (09/14)9 TroubleshootingFindings Possible cause CorrectionAppliance is not running Power supply interrupted Check connection cable for damages.Check the supply voltage.Engine is overheated Turn device switch on "0" and let enginecool off for min. 5 minutes.Power switch Check/replace the appliance switch.Pressure switch Check/replace the pressure switch.Appliance is not building up pressure Nozzle soiled Set nozzle to "High pressure".Clean the nozzle.Replace the nozzle.Air within the system Vent appliance.Insufficient water quantity Check water supply level (refer to tech-nical data).Suction area blocked Clean the sieve in the water connection.Check all inlet pipes to the pump.Pressure interruption Check the pressure and suction valvesfor leaks / replace.Check / adjust/ replace overflow valve.Device turns on and off while handspray gun is closedTightness of system Check the trigger gun and the O-ringson the high-pressure hose for leaks / re-place.Pressure interruption Check / adjust/ replace overflow valve.Check / replace the pressure retainingvalve.Check / replace the pressure switch /control piston.Appliance does not switch off when thehand-spray gun is closedPressure interruption Check / adjust/ replace overflow valve.Check / replace the pressure retainingvalve.Check/replace the pressure switch.Check / replace the pressure switch /control piston.Detergent is not being sucked in Low or no detergent flow Set nozzle to "CHEM".Check/ clean detergent suction hosewith filter.Open or check/clean detergent dosingvalve.Check / clean / replace the detergentcheck valve.Check / replace nozzle for detergent.Replace detergent injector.Pump leaky Water leak between the cylinder headand the piston casingCheck / replace high pressure and lowpressure seals.Oil leaks between the cylinder headand the piston casingReplace oil seals.Check / replace piston.Pump is vibrating Pipes Check suction pipes for water and de-tergent and ensure that they are leak-proof.Dosing valve Close dosing valve for detergent to op-erate the machine without detergent.Air within the system Vent appliance.