Landa SDHW Series, Operator'S Manual

Page: 15 / 40

15
Maintenance
PROBLEM POSSIBLE CAUSE SOLUTION
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.
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
BURNER MOTOR
WILL NOT RUN
Fuel pump seized Replace fuel pump.
Burner fan loose or misaligned Position correctly, tighten set screws.
Defective control switch Replace switch.
Loose wire Check and replace or tighten wiring.
Defective burner motor Replace motor.
LOW WATER
TEMPERATURE
Improper fuel or water in fuel Replace with clean and 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 buildup on coils not allowing heat
transfer
Clean coils. Call local Landa Dealer.
Improper burner nozzle See breakdown for model.
WATER
TEMPERATURE
TOO HOT
Incoming water to unit warm or hot Lower incoming water temperature.
Fuel pump pressure too high
Call local Landa Dealer for proper fuel
pressure.
Fuel pump defective Replace fuel pump.
Detergent line sucking air
Tighten all clamps. Check detergent lines for
holes.
Defective high limit switch Replace.
Incorrect fuel nozzle size See breakdown for model.
Insufficient water supplied Check water G.P.M. to machine.
Restricted water flow Check serial plate for proper size.
(For parts and information call your Local Dealer)
Landa SDHW6-35824 E/M Operator’s Manual 8.913-958.0 - AC