Landa SEHW6-3500 Operator's Manual - Troubleshooting
LANDA SEHW • 8.913-932.0 • Rev. 02/12a
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
12
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
MACHINE
SMOKES
Improper fuel or water in fuel
Drain tank and replace contaminated fuel.
Improper air adjustment
Readjust air bands on burner assembly.
Low fuel pressure
Adjust fuel pump pressure to specification on fuel
pump.
Air leaks in fuel lines
Check fuel lines for leaks or air bubbles. Tighten or
replace as needed.
Plugged or dirty burner nozzle
Replace.
Faulty burner nozzle spray
pattern
Replace nozzle.
Heavy accumulation of soot on
coils and burner assembly
Remove coils and burner assembly. Clean
thoroughly.
Misaligned electrode
Realign electrodes to specifications.
Obstruction in smoke stack
Check for insulation blockage or
other foreign objects.
LOW WATER
TEMPERATURE
Improper fuel or water in fuel
Drain fuel tank and replace with proper fuel.
Low fuel pressure
Increase fuel pressure.
Weak fuel pump
Check fuel pump pressure. Replace pump if
needed.
Fuel filter partially clogged
Replace as needed.
Soot build up on coils
Clean coils with soot remover.
Lime build up in coils
Clean inside of coils with coil clean.
Improper burner nozzle
See parts list.
WATER
TEMPERATURE
TOO HOT
Incoming water to
machine warm or hot
Lower incoming water temperature.
Fuel pump pressure too high
See specifications on fuel pump for proper fuel
pressure.
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 specifications for proper size.
Insufficient water supplied
Check G.P.M. to machine.
Restricted water flow
Check nozzle for obstruction, 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 pump to bind up
Fill to correct level