Landa 1.110-060.0, Service Manual

Page: 11 / 44

11
Maintenance
PROBLEM POSSIBLE CAUSE SOLUTION
BURNER WILL
NOT LIGHT
(continued from
previous page)
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 altitudes, it may be necessary to adjust the
engine. 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.
Air adjustment is improper Readjust air bands on burner assembly.
Fuel pressure is low <140 psi for
burner
Adjust fuel pump pressure to specifications.
Burner nozzle spray pattern is faulty
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 Service Manual 8.920-098.0 - AU