Landa PHW3-11024 Operator's Manual page 22

Maintenance
PROBLEM
Incoming water to machine warm or
hot
Fuel pump pressure too high
Fuel pump defective
WATER
Detergent line sucking air
TEMPERATURE
Defective high limit switch
TOO HOT
Incorrect fuel nozzle size
Insufficient water supplied
Restricted water flow
Insufficient voltage
Plugged nozzle
Wrong spray nozzle
PUMP MOTOR
STOPS AFTER A
Automatic overload switch tripped
FEW MINUTES OF
OPERATION OR
Motor wet
STARTS SLOW
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
RELIEF VALVE
LEAKS OR
Mis-adjusted or defective relief valve Adjust or replace as needed.
SPRAYS OUT
WATER
Scale or dirt plugging inside of coils
Air leak
Detergent metering valve packing
not tight or packing worn
Filter screen on detergent suction
DETERGENT NOT
hose plugged
DRAWING
Dried up detergent plugging metering
valve or injector
Restrictor in float tank missing
High viscosity of detergent
22
POSSIBLE CAUSE
Landa PHW Operator's Manual 8.917-417.0 - D
SOLUTION
Lower incoming water temperature.
Readjust fuel pressure.
Replace fuel pump.
Tighten all clamps. Check detergent 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 recep-
tacle. 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.
See "Preventative Maintenance Cleaning of Coils."
Tighten all clamps. Check detergent lines for holes.
Tighten nut. Replace valve or packing.
Clean or replace.
Clean and flush.
Install restrictor.
Dilute detergent to specifications. Read detergent
label.