23
Maintenance
PROBLEM
POSSIBLE CAUSE
SOLUTION
BURNER WILL
NOT LIGHT
(continued from
previous page)
Flex coupling slipping on fuel pump
shaft or burner motor shaft
Replace if needed.
On-Off switch defective
Check for electrical current reaching burner
assembly with burner switch on.
Heavy sooting on coil and burner can
cause interruption of air flow
and shorting of electrodes
Clean as required.
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
Replace.
Thermostat faulty or slow engine
speed
Increase engine RPM to increase voltage.
Pressure 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.
MACHINE
SMOKES
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 fuel pump pressure to specifications.
Plugged or dirty burner nozzle
Replace nozzle.
Faulty burner nozzle spray pattern
Replace nozzle.
Heavy accumulation of soot on coils
and burner assembly
Remove coils and burner assembly, clean
thoroughly.
Misaligned electrode setting
Realign electrodes to specifications.
Obstruction in smoke stack
Check for insulation blockage or other foreign
objects.
Manual Operator HOTSY 1265SSD/S 9.808-057.0 - A
