Kärcher 550.0 Operator's Manual

Kärcher 550.0 Operator's Manual Manual pdf 17 page image

9.800-079.0 • Rev. 05/1417PRESSURE WASHER Troubleshooting GuideTROUBLESHOOTINGPROBLEM POSSIBLE CAUSE SOLUTIONDETERGENT NOTDRAWINGAir is leaking Tighten all clamps. Check detergent lines for holes.Injector head may be blocked,dirty or damagedClean and make sure ball and spring behinddetergent hose barb or injector body are workingproperly.Filter screen on detergentsuction hose is pluggedClean or replace.Detergent has high viscosity Dilute detergent to specifications.Not using soap nozzle Insert soap nozzle into wand coupler.Detergent level is low Add detergent if needed.PUMP RUNNINGNORMALLY BUTPRESSURE LOWONINSTALLATIONPump is sucking air Check water supply and possibility of air seepage.Valves are sticking Check and clean or replace if necessary.Unloader valve seat is faulty Check and replace if necessary.Nozzle sized incorrectly Check and replace if necessary (see serial plate forproper size).Packing piston is worn Check and replace if necessary.FLUCTUATINGPRESSUREValves are worn Check and replace if necessary.Valve has a blockage Check and replace if necessary.Pump is sucking air Check water supply and air seepage at joint in suctionline.Packing piston is worn Check and replace if necessary.PUMP NOISY Air is in suction line Check water supply and connections on suction line.Inlet or discharge valvesprings are weak or brokenCheck and replace if necessary.Excessive matter is in valves Check and replace if necessary.Bearings are worn Check and replace if necessary.WATER DRIPPINGFROM UNDERPUMPPiston packing is worn Check and replace if necessary.O-Ring plunger retainer isworn Check and replace if necessary.Piston is cracked Check and replace if necessary.Pump protector is worn Lower water supply pressure. Do not run the spraygun closed longer than 5 minutes.OIL DRIPPING Oil seal is worn Check and replace if necessary.EXCESSIVEVIBRATION INDELIVERY LINEValves are functioningirregularlyCheck and replace if necessary.BURNER MOTORWILL NOT RUNFuel pump has seized Replace fuel pump.Burner fan loose ormisaligned Position correctly and tighten set screw.Control switch is defective Replace switch.There is a loose wire Check and replace or tighten wiring.Burner motor is defective Replace motor.RELIEF VALVELEAKS WATERRelief valve is defective Replace or repair relief valve.