PHW SERIES PRESSURE WASHER
OPERATOR’S MANUAL
29
LANDA PHW • 9/02
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
WATER
TEMPERATURE
TOO HOT
Incoming water to machine warm
or hot
Lower incoming water temperature.
Fuel pump pressure too high Call technical support.
Fuel pump defective Replace fuel pump.
Detergent line sucking air
Tighten all clamps. Check detergent line for
holes.
Defective high limit switch Replace.
Incorrect fuel nozzle size See exploded view parts list for proper size.
Insufficient water supplied Check GPM to machine.
Restricted water flow Check nozzle for obstruction and proper size.
PUMP MOTOR STOPS
AFTER A FEW
MINUTES OF
OPERATION OR
STARTS SLOW
Insufficient voltage Use heavier drop cord and check voltage at
receptacle. Check name plate for amperage draw.
Plugged nozzle Remove and clean nozzle. Turn on water pump
and flush lines, replace nozzle.
Wrong spray nozzle See serial plate for minimum nozzle size.
Automatic overload switch tripped Allow motor to cool - switch will automatically
reset.
Motor wet Allow to dry.
Short in electrical wiring Wire contacts should be clean and tight. No
breaks in wires.
Coil liming up causing excessive
pressure
See section on Preventative Maintenance.
Water pump low or out of oil
causing the pump to bind up
Fill to correct level.
RELIEF VALVE LEAKS
OR SPRAYS OUT
WATER
Spray nozzle plugged Remove nozzle and clean out obstruction.
Misadjusted or defective relief
valve
Adjust or replace as needed.
Scale or dirt plugging inside of
coils
See "Preventative Maintenance Cleaning of
Coils."
DETERGENT NOT
DRAWING
Air leak Tighten all clamps. Check detergent lines for
holes.
Detergent metering valve packing
not tight or packing worn
Tighten nut. Replace valve or packing.
Filter screen on detergent suction
hose plugged
Clean or replace.
Dried up detergent plugging
metering valve or injector
Clean and flush.
Restrictor in float tank missing Install restrictor.
High viscosity of detergent Dilute detergent to specifications. Read detergent
label.
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