PROBLEM POSSIBLE CAUSE SOLUTION
BURNER WILL
NOT LIGHT
(CONTINUED)
Heavy sooting on coil and burner can
cause interruption of air flow and
shorting of electrodes.
Clean as required.
Improper electrode setting
Clean and set 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 Replace.
Water not flowing through flow switch Open spray gun to allow water to flow.
Flow switch malfunction
Remove reed and test for continuity. Replace if
needed.
Fuel solenoid malfunction Replace if needed.
UNIT SMOKES
WHILE BURNER
IS RUNNING
OR
SMOKES AT
COLD-START
WHEN
BURNER IS OFF
ADJUST FOR
LOCAL
ALTITUDE,
HUMIDITY, AND
AMBIENT AIR
TEMPERATURE.
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 higher.
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 thor-
oughly.
Misaligned electrode Realign electrodes.
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 if 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 tank assembly parts list for correct nozzle.
21
Maintenance
Landa PHW Operator’s Manual 8.917-417.0 - D
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