Landa MHC3-25124 Operator's Manual page 19

PROBLEM
Burner nozzle is clogged
BURNER
Thermostat has malfunctioned
WILL NOT
LIGHT
Fuel solenoid has malfunctioned
Fuel is improper or water is in fuel
Air adjustment is improper
Fuel pressure is low 140 psi for burner
MACHINE
Burner nozzle is plugged or dirty
SMOKES
WHILE
BURNER UNIT
Burner nozzle spray pattern is faulty
IS RUNNING
Coil and burner assembly have heavy accumu-
lation of soot
OR
Electrode setting is misaligned
UNIT SMOKES
AT COLD-START
Smoke stack has obstruction
ONLY WHEN
BURNER IS OFF
Engine RPM is low
Fuel Pressure is too high for clean burn (fuel
PSI above 140 and below 200) and smokes
when burner is off
Fuel is improper or has water in it
Fuel pressure is low
LOW Fuel pump is weak
WATER
Fuel filter is partially clogged
TEMPERATURE
Soot buildup on coils is not allowing heat
transfer
Burner nozzle is improper
Incoming water to machine is warm or hot
Fuel pump pressure is too high
Fuel pump is defective
WATER
TEMPERATURE
Fuel nozzle is incorrect size
TOO HOT
Water supplied is insufficient
Water flow is restricted
Oil seal is worn
PRESENCE
OF WATER Air humidity is high
IN OIL
Packing is worn or bad
Air is leaking
DETERGENT
NOT Filter screen on detergent suction hose is
DRAWING plugged
Detergent has high viscosity
POSSIBLE CAUSE
Landa MHC 9.800-950.0 - V
SOLUTION
Clean as required.
Test and replace if needed.
Test and replace if needed.
Drain tank and replace contaminated fuel.
Readjust air bands on burner assembly.
Adjust fuel pump pressure to specifications.
Replace nozzle. Check parts breakdown for
nozzle size.
Replace nozzle. Check parts breakdown for
nozzle size.
Remove coils and burner assembly, clean
thoroughly. Call local dealer.
Realign electrodes to specifications.
Check for blockage or other foreign objects.
Increase RPM to correct specs. See serial
plate.
Reduce fuel pressure PSI/Increase air band
set for cleaner without max water heat loss
Replace with clean and proper fuel.
Increase fuel pressure.
Check fuel pump pressure. Replace pump if
needed.
Replace as needed.
Clean coils.
Call your local dealer for proper nozzle.
Lower incoming water temperature.
Call your local dealer for proper fuel pressure.
Replace fuel pump.
See parts breakdown or serial plate for proper
size.
Check water GPM to machine.
Check nozzle for obstruction and proper size.
Check serial plate for correct size.
Check and replace if necessary.
Check and change oil twice as often.
Check and replace if necessary.
Tighten all clamps. Check detergent lines for
holes.
Clean or replace.
Dilute detergent to specifications.
Maintenance
19