Landa PDHW5-35624E, Operator'S Manual

Page: 19 / 24

19
Maintenance
PROBLEM POSSIBLE CAUSE SOLUTION
BURNER WILL
NOT LIGHT
(continued from
previous page)
Improper electrode setting
Check and reset according to diagram in Operator’s
Manual.
Fuel not reaching combustion
chamber
Check fuel pump for proper flow. Check solenoid flow
switch on machines with spray gun control, for proper
on-off fuel flow control.
Clogged burner nozzle Clean as required.
Thermostat faulty or slow
engine speed
Increase engine RPM to increase voltage.
Flow switch malfunction Remove, test for continuity and replace as needed.
Flow solenoid malfunction Replace if needed.
FLUCTUATING
PRESSURE Valves worn Check and replace if necessary.
Blockage in valve Check and replace if necessary.
Pump sucking air
Check water supply and air seepage at joints in
suction line.
Worn piston packing Check and replace if necessary.
Engine altitude
The engine is preset for operation at altitudes below
1000 feet above sea level. If operated at higher alti-
tudes, it may be necessary to contact your local
authorized engine sales and service center for details.
MACHINE
SMOKES WHILE
BURNER UNIT IS
RUNNING OR
UNIT SMOKES AT
COLD-START
ONLY WHEN
BURNER IS OFF
Improper fuel or water in fuel Drain tank and replace contaminated fuel.
Improper air adjustment Readjust air bands on burner assembly.
Fuel pressure is low <140 psi for
burner Adjust fuel pump pressure to specifications.
Plugged or dirty burner nozzle Replace nozzle Check parts breakdown for nozzle
size.
Faulty burner nozzle spray pattern Replace nozzle Check parts breakdown for nozzle
size
Coil and burner assembly have
heavy accumulation of soot Remove coils and burner assembly, clean thoroughly
Call local dealer.
Misaligned electrode setting Realign electrodes to specifications.
Smoke stack has obstruction Check for insulation blockage or other foreign objects.
Engine RPM is low Increase RPM to correct specs. See serial plate.
Fuel Pressure is too high for clean
burn (fuel PSI above >140 and
below 200) and smokes when
burner is off Reduce fuel pressure PSI/Increase air band set for
cleaner without max water heat loss
Landa PDHW Series Operator’s Manual 8.919-980.0 - B