Landa pressure washer troubleshooting

Everyone who has ever faced the repairing knows how expensive the fixing could be. We suggest you before going to a repair shop study the table of troubleshooting. Perhaps with its help you will be able to solve the problem yourself.

Landa XPERT-HD 2.323 P pressure washer troubleshooting

PROBLEMPOSSIBLE CAUSESOLUTION
LOW OPERATING PRESSUREFaulty pressure gaugeInstall new gauge.
Insufficient water supplyUse larger supply hose; clean filter at water inlet.
Old, worn or incorrect spray nozzleMatch nozzle number to machine and/or replace with new nozzle.
Belt slippageTighten or replace; use correct belt.
Plumbing or hose leakCheck plumbing system for leaks. Retape leaks with teflon tape.
Faulty or mis-adjusted unloader valveAdjust unloader for proper pressure. Install repair kit when needed.
Worn packing in pumpInstall new packing kit.
Fouled or dirty inlet or discharge valves in pumpClean inlet and discharge valves.
Worn inlet or discharge valvesReplace with valve kit.
Obstruction in spray nozzleRemove obstruction.
Leaking pressure control valveRebuild or replace as needed.
Slow engine RPMSet engine speed at proper specifications.
Pump sucking airCheck water supply and possibility of air seepage.
Valves stickingCheck and clean or replace if necessary.
Unloader valve seat faultyCheck and replace if necessary.
BURNER WILL NOT LIGHTLittle or no fuelFill tank with fuel.
Improper fuel or water in fuelDrain fuel tank and fill with proper fuel.
Clogged fuel lineClean or replace.
Plugged fuel filterReplace as needed.
Mis-adjusted burner air bandsReadjust air bands for clean burn.
Little or no fuel pressure from fuel pumpIncrease fuel pressure to specification and/ or replace fuel pump. Test with pressure gauge.
Faulty burner transformerTest transformer for proper arc between contacts. Replace as needed.
Disconnected or short in electrical wiringAll wire contacts should be clean and tight. No breaks in wire
Flex coupling slipping on fuel pump shaft or burner motor shaftReplace if needed.
On-Off switch defectiveCheck for electrical current reaching burner assembly with burner switch on.
Heavy sooting on coil and burner can cause interruption of air flow and shorting of electrodesClean as required.
Improper electrode settingCheck and reset according to diagram in Operator's Manual.
Fuel not reaching combustion chamberCheck fuel pump for proper flow. Check solenoid flow switch on machines with spray gun control, for proper on-off fuel flow control.
Clogged burner nozzleClean as required.
Thermostat faulty or slow engine speedIncrease engine RPM to increase voltage.
Flow switch malfunctionRemove, test for continuity and replace as needed.
Flow solenoid malfunctionReplace if needed.
FLUCTUATING PRESSUREValves wornCheck and replace if necessary.
Blockage in valve
Pump sucking airCheck water supply and
air seepage at joints in suction line.
Worn piston packingCheck and replace if necessary.
MACHINE SMOKESImproper fuel or water in fuelDrain tank and replace contaminated fuel.
Improper air adjustmentReadjust air bands on burner assembly.
Low fuel pressureAdjust fuel pump pressure to specifications.
Plugged or dirty burner nozzleReplace nozzle.
Faulty burner nozzle spray patternReplace nozzle.
Heavy accumulation of soot on coils and burner assemblyRemove coils and burner assembly, clean thoroughly.
Misaligned electrode settingRealign electrodes to specifications.
Obstruction in smoke stackCheck for insulation blockage or other foreign objects.
Low engine RPMIncrease RPM
LOW WATER TEMPERATUREImproper fuel or water in fuelReplace with clean and proper fuel.
Low fuel pressureIncrease fuel pressure.
Weak fuel pumpCheck fuel pump pressure. Replace pump if needed.
Fuel filter partially cloggedReplace as needed.
Soot build-up on coils not allowing heat transferClean coils.
Improper burner nozzleSee nozzle specifications.
WATER TEMPERATURE TOO HOTIncoming water to machine warm or hotLower incoming water temperature.
Fuel pump pressure too highSee specifications for proper fuel pressure.
Fuel pump defectiveReplace fuel pump.
Detergent line sucking airTighten all clamps. Check detergent lines for holes.
Defective temperature switchReplace.
Incorrect fuel nozzle sizeSee specifications for proper fuel nozzle
Insufficient water suppliedCheck water G.P.M. to machine.
Restricted water flowCheck nozzle for obstruction, proper size.
PUMP NOISYAir in suction lineCheck water supply and connections on suction line.
Broken or weak inlet or discharge valve springsCheck and replace if necessary.
Excessive matter in valves
Worn bearings
PRESENCE OF WATER IN OILOil seal worn
High humidity in airCheck and change oil twice as often.
WATER DRIPPING FROM UNDER PUMPPiston packing wornCheck and replace if necessary.
O-Ring plunger retainer worn
Cracked piston
Pump protectorLower water supply pressure. Do not run with spray gun closed longer than 2 minutes
OIL DRIPPINGOil seal wornCheck and replace if necessary.
EXCESSIVE VIBRATION IN DELIVERY LINEIrregular functioning of the valves
DETERGENT NOT DRAWINGAir leakTighten all clamps. Check detergent lines for holes.
Restrictor in float tank is missingReplace restrictor. Check for proper orifice in restrictor.
Filter screen on detergent suction hose pluggedClean or replace.
Dried up detergent plugging metering valveDisassemble and clean thoroughly.
High viscosity of detergentDilute detergent to specifications.
Hole in detergent line(s)Repair hole.
Low detergent levelAdd detergent, if needed.
PUMP RUNNING NORMALLY BUT PRESSURE LOW ON INSTALLATIONPump sucking airCheck water supply and possibility of air seepage.
Valves stickingCheck and clean or replace if necessary.
Nozzle incorrectly sizedCheck and replace if necessary.
Unloader valve seat faulty
Worn piston packing
BURNER MOTOR WILL NOT RUNFuel pump seizedReplace fuel pump.
Burner fan loose or misalignedPosition correctly, tighten set screw.
Defective control switchReplace switch.
Loose wireCheck and replace or tighten wiring.
Defective burner motorReplace motor.
RELIEF VALVE LEAKS WATERRelief valve defectiveReplace or repair

Landa PDE2-1100 pressure washer troubleshooting

PROBLEMPOSSIBLE CAUSESOLUTION
PUMP RUNNING NORMALLY BUT PRESSURE LOW ON INSTALLATIONPump sucking airCheck water supply and possibility of air seepage.
Check valves stickingCheck and clean or replace if necessary.
Unloader valve seat faultyCheck and replace if necessary.
Nozzle incorrectly sized
Worn piston packing
FLUCTUATING PRESSUREValves worn
Blockage in valve
Pump sucking airCheck water supply connections.
Worn piston packingCheck and replace if necessary.
Insufficient waterCheck filter and hose for breakage.
PRESSURE LOW AFTER PERIOD OF NORMAL USENozzle wornCheck and replace if necessary.
Suction or delivery valves worn
Suction or delivery lines blocked
Unloader valve seat worn
Worn piston packing
Water temperature excessiveReduce to below 160° F.
PUMP NOISYAir in suction lineCheck water supply and connections on suction line.
Broken or weak suction or delivery valve springCheck and replace if necessary.
Foreign matter in valves
Worn bearings
Excessive temperature of waterReduce to below 160° F.
PRESENCE OF WATER IN PUMP OILOil seal wornCheck and replace if necessary.
High humidity in air
Piston packing worn
WATER DRIPPING FROM UNDER PUMPPiston packing worn
O-ring plunger retainer worn
WATER DRIPPING FROM PUMP PROTECTORWater supply pressure too high (over 90 PSI)Lower water supply pressure using a regulator.
Spray gun is in the off position for over 5 minutesTurn machine off if not in use for over 1 -2 minutes.
OIL DRIPPINGOil seal wornCheck and replace if necessary.
EXCESSIVE VIBRATION IN HIGH PRESSURE HOSEIrregular functioning of the pump valves
MOTOR DOES NOT START WHEN SWITCHED ONPlug not well connected or lack of power supplyCheck plug, cable and switch.
WHEN SWITCHING ON THE MACHINE, MOTOR HUMS BUT DOES NOT RUNMain voltage is insufficient, lower than the minimum requiredCheck to make sure main power supply is adequate.
The pump is stuck or frozenCheck by turning the motor manually.
MOTOR STOPSTripped thermal overload due to over- heatingCheck that main voltage corresponds to the specifications. Wait a few minutes before turning on the machine again by resetting the GFCI cord.

Landa HS-3000 pressure washer troubleshooting

PROBLEMPOSSIBLE CAUSESOLUTION
BURNER WILL NOT LIGHTDisconnected or short in electrical wiringAll wire contacts should be clean and tight. No breaks in wire.
Burner motor thermal protector trippedIf tripped, check voltage, connections and extensions for cause. Check fuel pump shaft rotation for binding, causing motor to overheat.
Flex-coupling slipping on fuel pump shaft or burner motor shaftReplace if needed.
On-off switch defectiveCheck continuity through burner switch.
Heavy sooting on coil and burner, can cause interruption of air flow and shorting of electrodesClean as required.
Improper electrode settingClean and test according to diagram in operator's manual.
Fuel not reaching combustion chamberCheck fuel pump for proper flow. Check solenoid flow switch on machines with spray gun control for proper on-off flow switch.
Fuel solenoid malfunctionCheck by placing screwdriver inside coil then turn machine on, open spray gun and check for magnetic pull.
Clogged burner nozzleReplace.
Water not turned onTurn on water to activate burner flow switch.
Flow switch malfunctionRemove, test for continuity and replace as needed.
MACHINE SMOKESImproper fuel or water in fuelDrain tank and replace contaminated fuel.
Improper air adjustmentReadjust air bands on burner assembly.
Low fuel pressureAdjust fuel pump pressure to specifications.
Air leaks in fuel linesCheck fuel lines for leaks or air bubbles. Tighten or replace as needed.
Plugged or dirty burner nozzleReplace.
Faulty burner nozzle spray patternReplace nozzle.
Heavy accumulation of soot on coils and burner assemblyRemove coils and burner assembly. Clean thoroughly.
Misaligned electrodeRealign electrodes to specifications.
Fuel filter partially cloggedReplace as needed.
Obstruction in smoke stackCheck for insulation blockage or other foreign objects.
Soot build up on coilsClean coils with soot remover.
Lime build up in coilsClean inside of coils using Landa's coil cleaner.
Improper burner nozzleSee exploded view parts list.
LOW WATER TEMPERATUREImproper fuel or water in fuelDrain fuel tank and replace with proper fuel.
Low fuel pressureIncrease fuel pressure.
Weak fuel pumpCheck fuel pump temperature. Replace pump if needed.
Fuel filter partially cloggedReplace as needed.
Soot build up on coilsClean coils with soot remover.
Lime build up on coilsClean inside of coils using Landa’s coil cleaner.
Improper burner nozzleSee exploded view parts list.
WATER TEMPERATURE TOO HOTIncoming water to machine warm or hotLower incoming water temperature.
Fuel pump pressure too highLower fuel pressure.
Fuel pump defectiveReplace fuel pump.
Detergent line sucking airTighten all clamps. Check detergent line for holes.
Defective high limit switchReplace.
Incorrect fuel nozzle sizeSee exploded view parts list.
Insufficient water suppliedCheck GPM to machine.
Restricted water flowCheck nozzle for obstruction, proper size.

Landa ZC3-15321 pressure washer troubleshooting

PROBLEMPOSSIBLE CAUSESOLUTION
PRESENCE OF WATER IN PUMP OILWater sprayed at machineChange oil. Direct spray away from machine.
High humidity in airCheck and change oil twice as often.
Piston packing worn. Oil seal wornCheck and replace if necessary.
ENGINE STRAINS UNDER LOADEngine governor misadjustedReadjust governor on engine. Take to local engine representative for adjustment.
Incorrect spray nozzleInstall proper nozzle size (See serial plate for proper size.)
Obstruction in spray nozzleRemove obstruction.
Misadjusted unloader valveCall Lancia technical support.
Engine low or out of oilCheck oil level.
Pump low or out of oil
Obstruction in hose, fittingClean or replace hose, fitting.
OIL SQUIRTS OUT OF OIL CAP ON PUMPPump overfilled with oilMaintain oil level at red dot on sight glass at rear of pump or at top of notch on dipstick (where applicable)
ENGINE OPERATES FOR 15 MINUTES THEN STOPSNot enough gas or engine oilFill tank with gas. Check oil level.
Vapor lock developed by heat of dayKeep gas tank full to avoid vapor lock.
Obstruction in fuel filterClean or replace fuel filter.
WATER DRIPPING FROM UNDER PUMPPiston packing wornCheck and replace if necessary.
O-ring plunger retainer worn
Cracked piston
OIL DRIPPINGOil seal worn
EXCESSIVE VIBRATION IN DELIVERY LINEIrregular functioning of the valves
WATER LEAKING FROM PUMP PROTECTORSpray gun dosed with machine running 5 minutes or longerOpen spray gun or turn off machine.
Excessive water supply pressurePlace a pressure regulator at end of 50' garden hose.

Landa ENG4-2000 pressure washer troubleshooting

PROBLEMPOSSIBLE CAUSESOLUTION
WATER TEMPERATURE TOO HOTIncoming water to machine warm or hotLower incoming water temperature.
Gas pressure too highSee specifications for proper gas pressure.
Detergent line sucking airTighten all clamps. Check detergent lines for holes.
Defective high limit switchReplace.
Incorrect burner nozzle sizeSee serial plate.
Insufficient water suppliedCheck water GPM to machine.
Restricted water flowCheck nozzle for obstruction, proper size.
PRESENCE OF WATER IN OILOil seal wornCheck and replace if necessary.
High humidity in airCheck and change oil twice as often.
WATER DRIPPING FROM UNDER PUMPPiston packing wornCheck and replace if necessary.
O-Ring plunger retainer worn
DETERGENT NOT DRAWINGAir leak Tighten all clamps.Check detergent lines for holes.
Detergent metering valve packing not tight or packing wornTighten nut. Replace valve or packing.
Filter screen on detergent suction hose pluggedClean or replace.
Dried up detergent plugging metering valveDisassemble and clean thoroughly.
High viscosity of detergentDilute detergent to specifications.
Restriction behind float tank screen removedInstall restriction.
Hole in detergent line(s)Repair hole.
Strainer basket pluggedRemove and clean.
Connections on selector valve loosePut teflon tape on all pipe connections.
Detergent solenoid not opening (where applicable)Check flow switch, replace detergent solenoid.
PUMP RUNNING NORMALLY BUT PRESSURE LOW ON INSTALLATIONPump sucking airCheck water supply and possibility of air.
Valves stickingCheck and clean or replace if necessary.
Unloader valve seat faultyCheck and replace if necessary.
Nozzle incorrectly sized
Worn piston packing
FLUCTUATING PRESSUREValves worn
Blockage in valve
Pump sucking airCheck water supply and air seepage at joints in suction line.
Worn piston packingCheck and replace if necessary.
PUMP NOISYAir in suction lineCheck water supply and connections on suction line.
Broken or weak inlet or discharge valve springsCheck and replace if necessary.
Excessive matter in valves
Worn bearings
OIL DRIPPINGOil seal worn
LOW OPERATING PRESSUREFaulty pressure gaugeInstall new gauge.
Insuffient water supplyUse larger garden hose. Clean filter washer at water inlet.
Old, worn or incorrect spray nozzleMatch nozzle number to machine and /or replace new nozzle.
Belt SlippageTighten or replace. Use correct belt.
Plumbing or hose leakCheck plumbing system for leaks. Retape leaks with teflon tape.
Faulty or misadjusted unloader valve (where applicable)Adjust unloader for proper pressure. Install repair kit when needed.
Worn packing in pumpInstall new packing kit.
Fouled or dirty inlet or discharge valves in pumpClean inlet and discharge valve.
Worn inlet or discharge valvesReplace with valve kit.
Obstruction in spray nozzleRemove obstruction.
Leaking pressure control valve (where applicable)Rebuild or replace as needed.
Detergent metering valve left open sucking air or faulty metering valveClose and /or replace metering valve.
Slow motor RPMCheck incoming voltage.
LOW WATER TEMPERATUREImproper size of gas linesSee sizing gas lines.
Low gas pressureIncrease gas pressure to machine.
Improper pressure regulatorSpecify BTU, building gas pressure 11 w.c.i. to machine for correct sizing of regulator.
Low gas pressureIncrease gas pressure
Soot buildup on coils not allowing heat transferClean coils.
Improper burner nozzleSee serial plate.
FLOW & BURNER SWITCH ON; NO SPARK, NO PILOT GASA. No main powerWith power switch on, open trigger on spray gun and set your test meter to the 24 volt scale. Probe terminals 24V and 24V(GND). If you do not read 24 volts, the problem is not the ignition system. Perform normal system checks of main power, transformer, thermostat and the limit control. If you do read 24 volts atTH and GND, the problem is in the ignition system. Check for loose or defective wiring. If wiring is good, replace the ignition control unit.
B. Faulty transformer
C. Faulty burner & flow switch
D. Faulty ignition control unit
HAVE SPARK, NO PILOT GAS FLOWMain gas supply turned offSet test meter to 24 volt scale.
1. Be sure main gas valve (gas cock or selector arm) is turned on.
2. With gas on and system sparking, probe terminals PV and 24V(GND). If pilot gas does not flow with 24 volts at these terminals, replace gas valve.
3. Probe terminals PV and MV/PV. If 24 volts not present, replace ignition control box.
HAVE PILOT GAS, NO SPARKA. Defective ignitor/ sensor and or its wiringSet test meter to ohm scale.
1. Disconnect the wire from the IGN terminal on the ignition control unit.
B. Faulty ignition control unit2. Touch one meter probe to the tip of the ignitor/ sensor rod in the pilot. Touch the other probe to the quick connect at the other end of ignitor/ sensor wire.
3. If you have continuity from the tip of the ignitor/ sensor rod to the connector and no spark, replace the ignition control unit.
4. If you do not have continuity through wire and the ignitor/sensor, check for a loose wire connection in the wire. Repair as needed.
HAVE PILOT FLAME, MAIN BURNER WILL NOTTURN ONFaulty main valve coil in the gas valveSet test meter to 24 volt scale.
Faulty ignitor/sensor and/or its wiringWith pilot flame on ignitor/sensor, probe terminals MV and MV/PV on the ignition control unit. If you read 24 volts here, but not at the gas valve, there is a loose wiring connection. Repair or replace as needed.
Ground wire not attached to machine chassisIf you do read 24 volts at MV and MV/PV and the pilot flame is impinging on the ignitor/sensor rod, the problems may be:
Faulty ignition control unita. Faulty ignitor/sensor and/or its wiring.
b. Faulty ignition control unit.
Set test meter to the ohm scale. Turn burner switch off.
Check continuity through the green ground wire and its connections.
Reconnect the ignitor/sensor wire and the ground wire.
Turn burner switch on. With the pilot burning and the flame on the ignitor/sensor rod, the main burner should turn on. If it does not, replace the ignition control unit.
SHORT-CYCLING OF MAIN BURNER. MAIN BURNER TURNS OFF BEFORE THE BURNER SWITCH OR FLOW SWITCH IS TURNED OFFDraft condition pulls flame from ignitor/sensor rod.Check the thermostat by bypassing at terminals P1 & 1.
Set thermostat high. With main burner on, observe the pilot flame impingement on the ignitor/sensor.
Faulty thermostat or water temperature is too highIf pilot flame is small and draft condition pulls flame from ignitor sensor rod, the burner will turn off and then on again, a. Adjust pilot flame higher or clean pilot oriface. b. Bend ignitor/sensor rod closer to pilot flame.