Landa Platinum Series Operator's Manual page 32

PHW/PHWS SERIES PRESSURE WASHER
PROBLEM
WATER
TEMPERATURE
TOO HOT
PUMP MOTOR STOPS
AFTER A FEW
MINUTES OF
OPERATION OR
STARTS SLOW
RELIEF VALVE LEAKS
OR SPRAYS OUT
WATER
CHEMICAL NOT
DRAWING
TROUBLESHOOTING
POSSIBLE CAUSE
Incoming water to unit warm or hot
Fuel pump pressure too high
Fuel pump defective
Chemical line sucking air
Defective high limit switch
Incorrect fuel nozzle size
Insufficient water supplied
Restricted water flow
Insufficient voltage
Plugged nozzle
Wrong spray nozzle
Automatic overload switch tripped
Motor wet
Short in electrical wiring
Coil liming up causing excessive
pressure
Water pump low or out of oil
causing the pump to bind up
Spray nozzle plugged
Misadjusted or defective relief
valve
Scale or dirt plugging inside of
coils
Air leak
Chemical metering valve packing
not tight or packing worn
Filter screen on chemical suction
hose plugged
Dried up chemical plugging
metering valve or injector
Restrictor in float tank missing
High viscosity of chemical
OPERATOR'S MANUAL 32
SOLUTION
Lower incoming water temperature.
Call technical support.
Replace fuel pump.
Tighten all clamps. Check chemical line for holes.
Replace.
See exploded view parts list for proper size.
Check GPM to machine.
Check nozzle for obstruction and proper size.
Use heavier drop cord and check voltage at
receptacle. Check name plate for amperage draw.
Remove and clean nozzle. Turn on water pump
and flush lines, replace nozzle.
See serial plate for minimum nozzle size.
Allow motor to cool - switch will automatically
reset.
Allow to dry.
Wire contacts should be clean and tight. No
breaks in wires.
See section on Preventative Maintenance.
Fill to correct level.
Remove nozzle and clean out obstruction.
Adjust or replace as needed.
See "Preventative Maintenance Cleaning of
Coils."
Tighten all clamps. Check chemical lines for
holes.
Tighten nut. Replace valve or packing.
Clean or replace.
Clean and flush.
Install restrictor.
Dilute chemical to specifications. Read chemical
label.